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SpanTables
forJoists
andRafters
AMERICAN SOFTWOOD LUMBERSTANDARD SIZES PS 20-70
Recommended byAMERICAN FOREST & PAPER ASSOCIATION(formerly National Forest Products Association)
1993
SpanTables
forJoists
andRafters
AMERICAN SOFTWOOD LUMBERSTANDARD SIZES PS 20-70
Recommended byAMERICAN FOREST & PAPER ASSOCIATION(formerly National Forest Products Association)
1993
Copyright © 1993, 2004American Forest & Paper Association
Washington, D.C.
Contents
TableNo. Description of Tables Page
Explanation of Tables .................................................................................................................1
FLOOR JOISTS WITH L/360 DEFLECTION LIMITS
F-1 Live Load of 30 psf plus dead load of 10 psf .....................................................................................4F-2 Live Load of 40 psf plus dead load of 10 psf .....................................................................................5F-3 Live Load of 50 psf plus dead load of 10 psf .....................................................................................6F-4 Live Load of 60 psf plus dead load of 10 psf .....................................................................................7
F-5 Live Load of 40 psf plus dead load of 20 psf .....................................................................................8F-6 Live Load of 50 psf plus dead load of 20 psf .....................................................................................9F-7 Live Load of 60 psf plus dead load of 20 psf .....................................................................................10
CEILING JOISTS WITH L/240 DEFLECTION LIMITS
C-1 Live Load of 10 psf plus dead load of 5 psf .......................................................................................11C-2 Live Load of 20 psf plus dead load of 10 psf .....................................................................................12
RAFTERS WITH L/240 DEFLECTION LIMITS
R-1 Live Load of 20 psf plus dead load of 10 psf .....................................................................................13R-2 Live Load of 30 psf plus dead load of 10 psf .....................................................................................14R-3 Live Load of 40 psf plus dead load of 10 psf .....................................................................................15R-4 Live Load of 50 psf plus dead load of 10 psf .....................................................................................16
R-5 Live Load of 20 psf plus dead load of 15 psf .....................................................................................17R-6 Live Load of 30 psf plus dead load of 15 psf .....................................................................................18R-7 Live Load of 40 psf plus dead load of 15 psf .....................................................................................19R-8 Live Load of 50 psf plus dead load of 15 psf .....................................................................................20
R-9 Live Load of 20 psf plus dead load of 20 psf .....................................................................................21R-10 Live Load of 30 psf plus dead load of 20 psf .....................................................................................22R-11 Live Load of 40 psf plus dead load of 20 psf .....................................................................................23R-12 Live Load of 50 psf plus dead load of 20 psf .....................................................................................24
Span Tables for Joists and Rafters
Table of Contents i
RAFTERS WITH L/180 DEFLECTION LIMITS
R-13 Live Load of 20 psf plus dead load of 10 psf .....................................................................................25R-14 Live Load of 30 psf plus dead load of 10 psf .....................................................................................26R-15 Live Load of 40 psf plus dead load of 10 psf .....................................................................................27R-16 Live Load of 50 psf plus dead load of 10 psf .....................................................................................28
R-17 Live Load of 20 psf plus dead load of 15 psf .....................................................................................29R-18 Live Load of 30 psf plus dead load of 15 psf .....................................................................................30R-19 Live Load of 40 psf plus dead load of 15 psf .....................................................................................31R-20 Live Load of 50 psf plus dead load of 15 psf .....................................................................................32
R-21 Live Load of 20 psf plus dead load of 20 psf .....................................................................................33R-22 Live Load of 30 psf plus dead load of 20 psf .....................................................................................34R-23 Live Load of 40 psf plus dead load of 20 psf .....................................................................................35R-24 Live Load of 50 psf plus dead load of 20 psf .....................................................................................36
Commentary .................................................................................................................A-1
Contents (cont'd)
TableNo. Description of Tables Page
Span Tables for Joists and Rafters
ii Table of Contents
Span Tables for Joists and Rafters
Explanation of Tables 1
EXPLANATION OF TABLES
1. SCOPE
These span tables for joists and rafters are calcu-lated on the basis of a series of modulus of elasticity(E) and bending design values (Fb). Additionally,compression perpendicular to grain design values(Fc⊥) are included as a consideration for selection ofjoist and rafters. The range of values in the tablesprovides allowable spans for all species and grades ofnominal 2-inch framing lumber customarily used inconstruction. These span tables assume installationof at least three joists or rafters that are spaced notmore than 24" on center. The calculated spansassume fully supported members, properly sheathedand nailed on the top edge of the joist or rafter.Straight-line interpolation shall be permitted for inter-mediate spans and design values.
2. LUMBER DESIGN VALUES
Use of these span tables requires reference to theapplicable design values for the various species andgrades of lumber. Tables W-1 and W-2 of DesignValues for Joists and Rafters, a supplement to thesespan tables, provide such values for the most com-monly used framing sizes. Modulus of elasticity (E),bending design values (Fb) and compression designvalues perpendicular to grain (Fc⊥) therein are basedon the National Design Specification® (NDS®)for Wood Construction and incorporate adjust-ments appropriate for repetitive-member use undervarious durations of load.
3. LUMBER SIZES
Tabulated spans apply to surfaced (S4S) lumberhaving dimensions which conform to the AmericanSoftwood Lumber Standard, PS 20-99. These sizesare as follows:
Nominal Actual SurfacedSize Dry Size2 x 4 1-1/2 x 3-1/22 x 6 1-1/2 x 5-1/22 x 8 1-1/2 x 7-1/42 x 10 1-1/2 x 9-1/42 x 12 1-1/2 x 11-1/4
4. MOISTURE CONTENT
The listed dry sizes are based on lumber at 19percent maximum moisture content. Since the changein dimension that occurs in wet service conditions hasalready been accounted for in the fully adjusted designvalue, tabulated spans are applicable to lumber in dryor wet service conditions.
5. SPAN MEASUREMENT
Tabulated spans are the distance from face toface of supports. For sloping rafters the span ismeasured along the horizontal projection. The com-mentary provides further information on span mea-surements including a chart which converts horizontaldistances to sloping distances, or vice versa.
6. ROOF LOADS
Rafter spans are tabulated for the most commonroof loads. The loads are based on adjusted roof snowloads from the governing building code. For roof liveloads less than 20 pounds per square foot (psf), rafterspans and required E values tabulated for 20 psf shallbe permitted to be adjusted in accordance with thefollowing table:
For roof live loads of 12 psf or 16 psf
Table Multiply tabulated Multiply requirednumber span by E-value by
12 psf 16 psf 12 psf 16 psf
R-1 1.17 1.07 0.96 0.99R-5 1.14 1.06 0.89 0.96R-9 1.12 1.05 0.84 0.94R-13 1.17 1.07 0.96 0.99R-17 1.14 1.06 0.89 0.96R-21 1.12 1.05 0.84 0.94
For intermediate values of roof live loads, use straightline interpolation.
Span Tables for Joists and Rafters
2 Explanation of Tables
7. LUMBER IDENTIFICATION
The tabulated spans in these tables apply tolumber identified by the grade stamp of, or certificateof inspection issued by, a lumber grading or inspectionbureau or agency recognized as being competent bythe Board of Review of the American Lumber Stan-dards Committee or the Canadian Lumber StandardsAccreditation Board.
8. GENERAL REQUIREMENTS
The quality of wood products and fasteners andthe design of load-supporting members and connec-tions shall conform to the NDS. All members shall beso framed, anchored, tied, and braced that they havethe necessary strength and rigidity. Adequate bracingand bridging to resist wind and other lateral forcesshall be provided.
9. REQUIRED COMPRESSIONPERPENDICULAR TO GRAIN
The required compression perpendicular to graindesign value, Fc⊥, for the joist or rafter shall bedetermined from Table 9.1. The table assumes a totalload of 66.67 plf on the joist or rafter. The required Fc⊥value shall be permitted to be adjusted in directproportion to alternate total loads using factors tabu-lated in Table 9.2. The commentary outlines severalexamples that include provisions for determining re-quired compression perpendicular to grain designvalues.
Span Tables for Joists and Rafters
Explanation of Tables 3
Table 9.1 Required compression perpendicular to grain design values (Fc⊥) in pounds persquare inch for simple span joists and rafters with uniform load
Bearing Length, in
Span, ft 1.5 2.0 2.5 3.0 3.5
2 30 22 18 15 134 59 44 36 30 256 89 67 53 44 388 119 89 71 59 51
10 148 111 89 74 6312 178 133 107 89 7614 207 156 124 104 8916 237 178 142 119 10218 267 200 160 133 11420 296 222 178 148 12722 326 244 196 163 14024 356 267 213 178 15226 385 289 231 193 165
Notes: 1) Bearing width is assumed to be 1.5".2) Total uniform load is assumed to be 66.67 plf.3) Alternate Fc⊥ values are possible by adjusting the tabulated values in direct proportion to the
desired load. Adjustment factors are tabulated in Table 9.2.4) See A.1.3 for 2 span floor joist requirements.
Table 9.2 Adjustment factors for alternate loading and spacing conditions for determiningrequired compression perpendicular to grain design values (Fc⊥) for joists and rafters
Loads, psf On-center spacing, in
Live Dead 12 16 19.2 24
10 5 0.23 0.30 0.36 0.4520 10 0.45 0.60 0.72 0.9030 10 0.60 0.80 0.96 1.2040 10 0.75 1.00 1.20 1.5050 10 0.90 1.20 1.44 1.8060 10 1.05 1.40 1.68 2.1020 15 0.53 0.70 0.84 1.0530 15 0.68 0.90 1.08 1.3540 15 0.83 1.10 1.32 1.6550 15 0.98 1.30 1.56 1.9520 20 0.60 0.80 0.96 1.2030 20 0.75 1.00 1.20 1.5040 20 0.90 1.20 1.44 1.8050 20 1.05 1.40 1.68 2.1060 20 1.20 1.60 1.92 2.40
Note: Multiply Table 9.1 values by adjustment factors to obtain required compression perpendicular tograin design values.
Span Tables for Joists and Rafters
4 Span Tables
TABL
E F-
1FL
OO
R JO
ISTS
WIT
H L
/360
DEF
LEC
TIO
N L
IMIT
S
DE
SIG
N C
RIT
ER
IA:
Def
lect
ion
- Fo
r 30
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
360
.St
reng
th -
Liv
e lo
ad o
f 30
psf
plu
s de
ad lo
adof
10
psf
dete
rmin
es t
he r
equi
red
bend
ing
desi
gn v
alue
.
Jois
tM
odul
us o
f E
last
icity
, E
, in
1,0
00,0
00 p
siS
ize
Spac
ing
(in)
(in)
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
12.0
9-
4 9
- 9
10-
110
- 5
10-
911
- 0
11-
311
- 7
11-1
012
- 0
12-
312
- 6
12-
912
-11
13-
113
- 4
13-
616
.0 8
- 6
8-1
0 9
- 2
9-
6 9
- 9
10-
010
- 3
10-
610
- 9
10-1
111
- 2
11-
411
- 7
11-
911
-11
12-
112
- 3
2x 6
19.2
8-
0 8
- 4
8-
8 8
-11
9-
2 9
- 5
9-
8 9
-10
10-
110
- 4
10-
610
- 8
10-1
011
- 1
11-
311
- 5
11-
724
.0 7
- 5
7-
9 8
- 0
8-
3 8
- 6
8-
9 8
-11
9-
2 9
- 4
9-
7 9
- 9
9-1
110
- 1
10-
310
- 5
10-
710
- 9
12.0
12-
412
-10
13-
413
- 9
14-
214
- 6
14-1
115
- 3
15-
715
-10
16-
216
- 6
16-
917
- 0
17-
417
- 7
17-1
016
.011
- 3
11-
812
- 1
12-
612
-10
13-
213
- 6
13-1
014
- 2
14-
514
- 8
15-
015
- 3
15-
615
- 9
15-1
116
- 2
2x 8
19.2
10-
711
- 0
11-
411
- 9
12-
112
- 5
12-
913
- 0
13-
413
- 7
13-1
014
- 1
14-
414
- 7
14-
915
- 0
15-
324
.0 9
-10
10-
210
- 7
10-1
111
- 3
11-
611
-10
12-
112
- 4
12-
712
-10
13-
113
- 4
13-
613
- 9
13-1
114
- 2
12.0
15-
916
- 5
17-
017
- 6
18-
018
- 6
19-
019
- 5
19-1
020
- 3
20-
821
- 0
21-
521
- 9
22-
122
- 5
22-
916
.014
- 4
14-1
115
- 5
15-1
116
- 5
16-1
017
- 3
17-
818
- 0
18-
518
- 9
19-
119
- 5
19-
920
- 1
20-
420
- 8
2x10
19.2
13-
614
- 0
14-
615
- 0
15-
515
-10
16-
316
- 7
17-
017
- 4
17-
818
- 0
18-
318
- 7
18-1
019
- 2
19-
524
.012
- 6
13-
013
- 6
13-1
114
- 4
14-
815
- 1
15-
515
- 9
16-
116
- 5
16-
817
- 0
17-
317
- 6
17-
918
- 0
12.0
19-
219
-11
20-
821
- 4
21-1
122
- 6
23-
123
- 7
24-
224
- 8
25-
125
- 7
26-
016
.017
- 5
18-
118
- 9
19-
419
-11
20-
621
- 0
21-
621
-11
22-
522
-10
23-
323
- 7
24-
024
- 5
24-
925
- 1
2x12
19.2
16-
517
- 0
17-
818
- 3
18-
919
- 3
19-
920
- 2
20-
821
- 1
21-
621
-10
22-
322
- 7
22-1
123
- 3
23-
724
.015
- 2
15-1
016
- 5
16-1
117
- 5
17-1
118
- 4
18-
919
- 2
19-
719
-11
20-
320
- 8
21-
021
- 4
21-
721
-11
F b12
.0 6
96 7
53 8
08 8
61 9
12 9
6210
1110
5811
0511
5011
9512
3912
8213
2413
6614
0714
48F b
16.0
766
829
889
947
1004
1059
1112
1165
1216
1266
1315
1364
1411
1458
1504
1549
1593
F b19
.2 8
14 8
81 9
4510
0710
6711
2511
8212
3812
9213
4513
9814
4914
9915
4915
9816
4616
93F b
24.0
877
949
1018
1084
1149
1212
1273
1333
1392
1449
1506
1561
1615
1669
1721
1773
1824
Not
e:
The
requ
ired
bend
ing
desi
gn v
alue
, Fb,
in p
ound
s pe
r sq
uare
inc
h is
sho
wn
at t
he b
otto
m o
f ea
ch t
able
and
is
appl
icab
le t
o al
l lu
mbe
r si
zes
show
n.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6'
and
less
. C
heck
sou
rces
of
supp
ly f
or a
vaila
bilit
y of
lum
ber
in l
engt
hs g
reat
er t
han
20'.
Span Tables 5
Span Tables for Joists and Rafters
TABL
E F-
2FL
OO
R JO
ISTS
WIT
H L
/360
DEF
LEC
TIO
N L
IMIT
S
DE
SIG
N C
RIT
ER
IA:
Def
lect
ion
- Fo
r 40
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
360
.St
reng
th -
Liv
e lo
ad o
f 40
psf
plu
s de
ad lo
adof
10
psf
dete
rmin
es t
he r
equi
red
bend
ing
desi
gn v
alue
.
Jois
tM
odul
us o
f E
last
icity
, E
, in
1,0
00,0
00 p
siS
ize
Spac
ing
(in)
(in)
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
12.0
8-
6 8
-10
9-
2 9
- 6
9-
910
- 0
10-
310
- 6
10-
910
-11
11-
211
- 4
11-
711
- 9
11-1
112
- 1
12-
316
.0 7
- 9
8-
0 8
- 4
8-
7 8
-10
9-
1 9
- 4
9-
6 9
- 9
9-1
110
- 2
10-
410
- 6
10-
810
-10
11-
011
- 2
2x 6
19.2
7-
3 7
- 7
7-1
0 8
- 1
8-
4 8
- 7
8-
9 9
- 0
9-
2 9
- 4
9-
6 9
- 8
9-1
010
- 0
10-
210
- 4
10-
624
.0 6
- 9
7-
0 7
- 3
7-
6 7
- 9
7-1
1 8
- 2
8-
4 8
- 6
8-
8 8
-10
9-
0 9
- 2
9-
4 9
- 6
9-
7 9
- 9
12.0
11-
311
- 8
12-
112
- 6
12-1
013
- 2
13-
613
-10
14-
214
- 5
14-
815
- 0
15-
315
- 6
15-
915
-11
16-
216
.010
- 2
10-
711
- 0
11-
411
- 8
12-
012
- 3
12-
712
-10
13-
113
- 4
13-
713
-10
14-
114
- 3
14-
614
- 8
2x 8
19.2
9-
710
- 0
10-
410
- 8
11-
011
- 3
11-
711
-10
12-
112
- 4
12-
712
-10
13-
013
- 3
13-
513
- 8
13-1
024
.0 8
-11
9-
3 9
- 7
9-1
110
- 2
10-
610
- 9
11-
011
- 3
11-
511
- 8
11-1
112
- 1
12-
312
- 6
12-
812
-10
12.0
14-
414
-11
15-
515
-11
16-
516
-10
17-
317
- 8
18-
018
- 5
18-
919
- 1
19-
519
- 9
20-
120
- 4
20-
816
.013
- 0
13-
614
- 0
14-
614
-11
15-
315
- 8
16-
016
- 5
16-
917
- 0
17-
417
- 8
17-1
118
- 3
18-
618
- 9
2x10
19.2
12-
312
- 9
13-
213
- 7
14-
014
- 5
14-
915
- 1
15-
515
- 9
16-
016
- 4
16-
716
-11
17-
217
- 5
17-
824
.011
- 4
11-1
012
- 3
12-
813
- 0
13-
413
- 8
14-
014
- 4
14-
714
-11
15-
215
- 5
15-
815
-11
16-
216
- 5
12.0
17-
518
- 1
18-
919
- 4
19-1
120
- 6
21-
021
- 6
21-1
122
- 5
22-1
023
- 3
23-
724
- 0
24-
524
- 9
25-
116
.015
-10
16-
517
- 0
17-
718
- 1
18-
719
- 1
19-
619
-11
20-
420
- 9
21-
121
- 6
21-1
022
- 2
22-
622
-10
2x12
19.2
14-1
115
- 6
16-
016
- 7
17-
017
- 6
17-1
118
- 4
18-
919
- 2
19-
619
-10
20-
220
- 6
20-1
021
- 2
21-
624
.013
-10
14-
414
-11
15-
415
-10
16-
316
- 8
17-
017
- 5
17-
918
- 1
18-
518
- 9
19-
119
- 4
19-
819
-11
F b12
.0 7
18 7
77 8
33 8
88 9
41 9
9310
4310
9211
4011
8712
3312
7813
2313
6714
1014
5214
94F b
16.0
790
855
917
977
1036
1093
1148
1202
1255
1306
1357
1407
1456
1504
1551
1598
1644
F b19
.2 8
40 9
09 9
7510
3911
0111
6112
2012
7713
3313
8814
4214
9515
4715
9816
4916
9817
47F b
24.0
905
979
1050
1119
1186
1251
1314
1376
1436
1496
1554
1611
1667
1722
1776
1829
1882
Not
e:Th
e re
quire
d be
ndin
g de
sign
val
ue, F
b, in
pou
nds
per
squa
re i
nch
is s
how
n at
the
bot
tom
of
each
tab
le a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Sp
ans
are
show
n in
fee
t-inc
hes
and
are
limite
d to
26'
a
nd le
ss.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables for Joists and Rafters
6 Span Tables
TABL
E F-
3FL
OO
R JO
ISTS
WIT
H L
/360
DEF
LEC
TIO
N L
IMIT
S
DE
SIG
N C
RIT
ER
IA:
Def
lect
ion
- Fo
r 50
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
360
.St
reng
th -
Liv
e lo
ad o
f 50
psf
plu
s de
ad lo
adof
10
psf
dete
rmin
es t
he r
equi
red
bend
ing
desi
gn v
alue
.
Jois
tM
odul
us o
f E
last
icity
, E
, in
1,0
00,0
00 p
siS
ize
Spac
ing
(in)
(in)
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
12.0
7-1
1 8
- 3
8-
6 8
- 9
9-
1 9
- 3
9-
6 9
- 9
9-1
110
- 2
10-
410
- 6
10-
910
-11
11-
111
- 3
11-
516
.0 7
- 2
7-
6 7
- 9
8-
0 8
- 3
8-
5 8
- 8
8-1
0 9
- 1
9-
3 9
- 5
9-
7 9
- 9
9-1
110
- 1
10-
210
- 4
2x 6
19.2
6-
9 7
- 0
7-
3 7
- 6
7-
9 7
-11
8-
2 8
- 4
8-
6 8
- 8
8-1
0 9
- 0
9-
2 9
- 4
9-
6 9
- 7
9-
924
.0 6
- 3
6-
6 6
- 9
7-
0 7
- 2
7-
4 7
- 7
7-
9 7
-11
8-
1 8
- 3
8-
4 8
- 6
8-
8 8
- 9
8-1
1 9
- 1
12.0
10-
510
-10
11-
311
- 7
11-1
112
- 3
12-
712
-10
13-
113
- 5
13-
813
-11
14-
214
- 4
14-
714
-10
15-
016
.0 9
- 6
9-1
010
- 2
10-
610
-10
11-
111
- 5
11-
811
-11
12-
212
- 5
12-
712
-10
13-
113
- 3
13-
513
- 8
2x 8
19.2
8-1
1 9
- 3
9-
7 9
-11
10-
210
- 6
10-
911
- 0
11-
311
- 5
11-
811
-11
12-
112
- 3
12-
612
- 8
12-1
024
.0 8
- 3
8-
7 8
-11
9-
2 9
- 6
9-
910
- 0
10-
210
- 5
10-
810
-10
11-
011
- 3
11-
511
- 7
11-
911
-11
12.0
13-
313
-10
14-
414
- 9
15-
215
- 7
16-
016
- 5
16-
917
- 1
17-
517
- 9
18-
018
- 4
18-
718
-11
19-
216
.012
- 1
12-
713
- 0
13-
513
-10
14-
214
- 7
14-1
115
- 2
15-
615
-10
16-
116
- 5
16-
816
-11
17-
217
- 5
2x10
19.2
11-
411
-10
12-
312
- 8
13-
013
- 4
13-
814
- 0
14-
414
- 7
14-1
115
- 2
15-
515
- 8
15-1
116
- 2
16-
524
.010
- 7
11-
011
- 4
11-
912
- 1
12-
512
- 8
13-
013
- 3
13-
713
-10
14-
114
- 4
14-
714
- 9
15-
015
- 2
12.0
16-
216
-10
17-
518
- 0
18-
619
- 0
19-
619
-11
20-
420
- 9
21-
221
- 7
21-1
122
- 3
22-
823
- 0
23-
416
.014
- 8
15-
315
-10
16-
416
-10
17-
317
- 8
18-
118
- 6
18-1
019
- 3
19-
719
-11
20-
320
- 7
20-1
021
- 2
2x12
19.2
13-1
014
- 4
14-1
115
- 4
15-1
016
- 3
16-
817
- 0
17-
517
- 9
18-
118
- 5
18-
919
- 1
19-
419
- 8
19-1
124
.012
-10
13-
413
-10
14-
314
- 8
15-
115
- 5
15-1
016
- 2
16-
616
-10
17-
117
- 5
17-
818
- 0
18-
318
- 6
F b12
.0 7
43 8
03 8
62 9
18 9
7310
2610
7811
2911
7912
2812
7513
2213
6814
1314
5815
0215
45F b
16.0
817
884
949
1011
1071
1130
1187
1243
1298
1351
1404
1455
1506
1555
1604
1653
1700
F b19
.2 8
69 9
4010
0810
7411
3812
0112
6113
2113
7914
3614
9115
4616
0016
5317
0517
5618
07F b
24.0
936
1012
1086
1157
1226
1293
1359
1423
1485
1547
1607
1666
1724
1781
1837
1892
1946
Not
e:Th
e re
quire
d be
ndin
g de
sign
val
ue, F
b, in
pou
nds
per
squa
re i
nch
is s
how
n at
the
bot
tom
of
each
tab
le a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Sp
ans
are
show
n in
fee
t-inc
hes
and
are
limite
d to
26'
and
less
. C
heck
sou
rces
of
supp
ly f
or a
vaila
bilit
y of
lum
ber
in l
engt
hs g
reat
er t
han
20'.
The
gov
erni
ng b
uild
ing
code
may
req
uire
a c
heck
for
con
cent
rate
d lo
ads
for
occu
panc
ies
with
thi
sun
iform
loa
d co
nditi
on.
Span Tables 7
Span Tables for Joists and Rafters
TABL
E F-
4FL
OO
R JO
ISTS
WIT
H L
/360
DEF
LEC
TIO
N L
IMIT
S
DE
SIG
N C
RIT
ER
IA:
Def
lect
ion
- Fo
r 60
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
360
.St
reng
th -
Liv
e lo
ad o
f 60
psf
plu
s de
ad lo
adof
10
psf
dete
rmin
es t
he r
equi
red
bend
ing
desi
gn v
alue
.
Jois
tM
odul
us o
f E
last
icity
, E
, in
1,0
00,0
00 p
siS
ize
Spac
ing
(in)
(in)
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
12.0
7-
5 7
- 9
8-
0 8
- 3
8-
6 8
- 9
8-1
1 9
- 2
9-
4 9
- 7
9-
9 9
-11
10-
110
- 3
10-
510
- 7
10-
916
.0 6
- 9
7-
0 7
- 3
7-
6 7
- 9
7-1
1 8
- 2
8-
4 8
- 6
8-
8 8
-10
9-
0 9
- 2
9-
4 9
- 6
9-
7 9
- 9
2x 6
19.2
6-
4 6
- 7
6-1
0 7
- 1
7-
3 7
- 6
7-
8 7
-10
8-
0 8
- 2
8-
4 8
- 6
8-
8 8
- 9
8-1
1 9
- 0
9-
224
.0 5
-11
6-
2 6
- 4
6-
7 6
- 9
6-1
1 7
- 1
7-
3 7
- 5
7-
7 7
- 9
7-1
0 8
- 0
8-
2 8
- 3
8-
5 8
- 6
12.0
9-1
010
- 2
10-
710
-11
11-
311
- 6
11-1
012
- 1
12-
412
- 7
12-1
013
- 1
13-
413
- 6
13-
913
-11
14-
216
.0 8
-11
9-
3 9
- 7
9-1
110
- 2
10-
610
- 9
11-
011
- 3
11-
511
- 8
11-1
112
- 1
12-
312
- 6
12-
812
-10
2x 8
19.2
8-
5 8
- 9
9-
0 9
- 4
9-
7 9
-10
10-
110
- 4
10-
710
- 9
11-
011
- 2
11-
411
- 7
11-
911
-11
12-
124
.0 7
- 9
8-
1 8
- 5
8-
8 8
-11
9-
2 9
- 4
9-
7 9
-10
10-
010
- 2
10-
510
- 7
10-
910
-11
11-
111
- 3
12.0
12-
613
- 0
13-
613
-11
14-
414
- 8
15-
115
- 5
15-
916
- 1
16-
516
- 8
17-
017
- 3
17-
617
- 9
18-
016
.011
- 4
11-1
012
- 3
12-
813
- 0
13-
413
- 8
14-
014
- 4
14-
714
-11
15-
215
- 5
15-
815
-11
16-
216
- 5
2x10
19.2
10-
811
- 1
11-
611
-11
12-
312
- 7
12-1
113
- 2
13-
613
- 9
14-
014
- 3
14-
614
- 9
15-
015
- 2
15-
524
.0 9
-11
10-
410
- 8
11-
011
- 4
11-
811
-11
12-
312
- 6
12-
913
- 0
13-
313
- 6
13-
813
-11
14-
114
- 4
12.0
15-
215
-10
16-
516
-11
17-
517
-11
18-
418
- 9
19-
219
- 7
19-1
120
- 3
20-
821
- 0
21-
421
- 7
21-1
116
.013
-10
14-
414
-11
15-
415
-10
16-
316
- 8
17-
017
- 5
17-
918
- 1
18-
518
- 9
19-
119
- 4
19-
819
-11
2x12
19.2
13-
013
- 6
14-
014
- 5
14-1
115
- 3
15-
816
- 0
16-
516
- 9
17-
017
- 4
17-
817
-11
18-
318
- 6
18-
924
.012
- 1
12-
713
- 0
13-
513
-10
14-
214
- 7
14-1
115
- 2
15-
615
-10
16-
116
- 5
16-
816
-11
17-
217
- 5
F b12
.0 7
67 8
30 8
90 9
4910
0510
6111
1411
6712
1812
6813
1713
6614
1314
6015
0615
5115
96F b
16.0
844
913
980
1044
1107
1167
1226
1284
1341
1396
1450
1503
1556
1607
1658
1707
1757
F b19
.2 8
97 9
7110
4111
1011
7612
4013
0313
6514
2514
8315
4115
9716
5317
0817
6118
1418
67F b
24.0
967
1046
1122
1195
1267
1336
1404
1470
1535
1598
1660
1721
1781
1840
1897
1955
2011
Not
e:Th
e re
quire
d be
ndin
g de
sign
val
ue, F
b, in
pou
nds
per
squa
re i
nch
is s
how
n at
the
bot
tom
of
each
tab
le a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Sp
ans
are
show
n in
fee
t-inc
hes
and
are
limite
d to
26'
a
nd le
ss.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables for Joists and Rafters
8 Span Tables
TABL
E F-
5FL
OO
R JO
ISTS
WIT
H L
/360
DEF
LEC
TIO
N L
IMIT
S
DE
SIG
N C
RIT
ER
IA:
Def
lect
ion
- Fo
r 40
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
360
.St
reng
th -
Liv
e lo
ad o
f 40
psf
plu
s de
ad lo
adof
20
psf
dete
rmin
es t
he r
equi
red
bend
ing
desi
gn v
alue
.
Jois
tM
odul
us o
f E
last
icity
, E
, in
1,0
00,0
00 p
siS
ize
Spac
ing
(in)
(in)
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
12.0
8-
6 8
-10
9-
2 9
- 6
9-
910
- 0
10-
310
- 6
10-
910
-11
11-
211
- 4
11-
711
- 9
11-1
112
- 1
12-
316
.0 7
- 9
8-
0 8
- 4
8-
7 8
-10
9-
1 9
- 4
9-
6 9
- 9
9-1
110
- 2
10-
410
- 6
10-
810
-10
11-
011
- 2
2x 6
19.2
7-
3 7
- 7
7-1
0 8
- 1
8-
4 8
- 7
8-
9 9
- 0
9-
2 9
- 4
9-
6 9
- 8
9-1
010
- 0
10-
210
- 4
10-
624
.0 6
- 9
7-
0 7
- 3
7-
6 7
- 9
7-1
1 8
- 2
8-
4 8
- 6
8-
8 8
-10
9-
0 9
- 2
9-
4 9
- 6
9-
7 9
- 9
12.0
11-
311
- 8
12-
112
- 6
12-1
013
- 2
13-
613
-10
14-
214
- 5
14-
815
- 0
15-
315
- 6
15-
915
-11
16-
216
.010
- 2
10-
711
- 0
11-
411
- 8
12-
012
- 3
12-
712
-10
13-
113
- 4
13-
713
-10
14-
114
- 3
14-
614
- 8
2x 8
19.2
9-
710
- 0
10-
410
- 8
11-
011
- 3
11-
711
-10
12-
112
- 4
12-
712
-10
13-
013
- 3
13-
513
- 8
13-1
024
.0 8
-11
9-
3 9
- 7
9-1
110
- 2
10-
610
- 9
11-
011
- 3
11-
511
- 8
11-1
112
- 1
12-
312
- 6
12-
812
-10
12.0
14-
414
-11
15-
515
-11
16-
516
-10
17-
317
- 8
18-
018
- 5
18-
919
- 1
19-
519
- 9
20-
120
- 4
20-
816
.013
- 0
13-
614
- 0
14-
614
-11
15-
315
- 8
16-
016
- 5
16-
917
- 0
17-
417
- 8
17-1
118
- 3
18-
618
- 9
2x10
19.2
12-
312
- 9
13-
213
- 7
14-
014
- 5
14-
915
- 1
15-
515
- 9
16-
016
- 4
16-
716
-11
17-
217
- 5
17-
824
.011
- 4
11-1
012
- 3
12-
813
- 0
13-
413
- 8
14-
014
- 4
14-
714
-11
15-
215
- 5
15-
815
-11
16-
216
- 5
12.0
17-
518
- 1
18-
919
- 4
19-1
120
- 6
21-
021
- 6
21-1
122
- 5
22-1
023
- 3
23-
724
- 0
24-
524
- 9
25-
116
.015
-10
16-
517
- 0
17-
718
- 1
18-
719
- 1
19-
619
-11
20-
420
- 9
21-
121
- 6
21-1
022
- 2
22-
622
-10
2x12
19.2
14-1
115
- 6
16-
016
- 7
17-
017
- 6
17-1
118
- 4
18-
919
- 2
19-
619
-10
20-
220
- 6
20-1
021
- 2
21-
624
.013
-10
14-
414
-11
15-
415
-10
16-
316
- 8
17-
017
- 5
17-
918
- 1
18-
518
- 9
19-
119
- 4
19-
819
-11
F b12
.0 8
62 9
3210
0010
6611
2911
9112
5113
1013
6814
2414
8015
3415
8716
4016
9217
4217
93F b
16.0
949
1026
1101
1173
1243
1311
1377
1442
1506
1568
1629
1688
1747
1805
1862
1918
1973
F b19
.210
0810
9011
7012
4613
2113
9314
6415
3316
0016
6617
3117
9418
5719
1819
7820
3820
97F b
24.0
1086
1174
1260
1343
1423
1501
1577
1651
1724
1795
1864
1933
2000
2066
2131
2195
2258
Not
e:Th
e re
quire
d be
ndin
g de
sign
val
ue, F
b, in
pou
nds
per
squa
re i
nch
is s
how
n at
the
bot
tom
of
each
tab
le a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Sp
ans
are
show
n in
fee
t-inc
hes
and
are
limite
d to
26'
a
nd le
ss.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables 9
Span Tables for Joists and Rafters
TABL
E F-
6FL
OO
R JO
ISTS
WIT
H L
/360
DEF
LEC
TIO
N L
IMIT
S
DE
SIG
N C
RIT
ER
IA:
Def
lect
ion
- Fo
r 50
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
360
.St
reng
th -
Liv
e lo
ad o
f 50
psf
plu
s de
ad lo
adof
20
psf
dete
rmin
es t
he r
equi
red
bend
ing
desi
gn v
alue
.
Jois
tM
odul
us o
f E
last
icity
, E
, in
1,0
00,0
00 p
siS
ize
Spac
ing
(in)
(in)
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
12.0
7-1
1 8
- 3
8-
6 8
- 9
9-
1 9
- 3
9-
6 9
- 9
9-1
110
- 2
10-
410
- 6
10-
910
-11
11-
111
- 3
11-
516
.0 7
- 2
7-
6 7
- 9
8-
0 8
- 3
8-
5 8
- 8
8-1
0 9
- 1
9-
3 9
- 5
9-
7 9
- 9
9-1
110
- 1
10-
210
- 4
2x 6
19.2
6-
9 7
- 0
7-
3 7
- 6
7-
9 7
-11
8-
2 8
- 4
8-
6 8
- 8
8-1
0 9
- 0
9-
2 9
- 4
9-
6 9
- 7
9-
924
.0 6
- 3
6-
6 6
- 9
7-
0 7
- 2
7-
4 7
- 7
7-
9 7
-11
8-
1 8
- 3
8-
4 8
- 6
8-
8 8
- 9
8-1
1 9
- 1
12.0
10-
510
-10
11-
311
- 7
11-1
112
- 3
12-
712
-10
13-
113
- 5
13-
813
-11
14-
214
- 4
14-
714
-10
15-
016
.0 9
- 6
9-1
010
- 2
10-
610
-10
11-
111
- 5
11-
811
-11
12-
212
- 5
12-
712
-10
13-
113
- 3
13-
513
- 8
2x 8
19.2
8-1
1 9
- 3
9-
7 9
-11
10-
210
- 6
10-
911
- 0
11-
311
- 5
11-
811
-11
12-
112
- 3
12-
612
- 8
12-1
024
.0 8
- 3
8-
7 8
-11
9-
2 9
- 6
9-
910
- 0
10-
210
- 5
10-
810
-10
11-
011
- 3
11-
511
- 7
11-
911
-11
12.0
13-
313
-10
14-
414
- 9
15-
215
- 7
16-
016
- 5
16-
917
- 1
17-
517
- 9
18-
018
- 4
18-
718
-11
19-
216
.012
- 1
12-
713
- 0
13-
513
-10
14-
214
- 7
14-1
115
- 2
15-
615
-10
16-
116
- 5
16-
816
-11
17-
217
- 5
2x10
19.2
11-
411
-10
12-
312
- 8
13-
013
- 4
13-
814
- 0
14-
414
- 7
14-1
115
- 2
15-
515
- 8
15-1
116
- 2
16-
524
.010
- 7
11-
011
- 4
11-
912
- 1
12-
512
- 8
13-
013
- 3
13-
713
-10
14-
114
- 4
14-
714
- 9
15-
015
- 2
12.0
16-
216
-10
17-
518
- 0
18-
619
- 0
19-
619
-11
20-
420
- 9
21-
221
- 7
21-1
122
- 3
22-
823
- 0
23-
416
.014
- 8
15-
315
-10
16-
416
-10
17-
317
- 8
18-
118
- 6
18-1
019
- 3
19-
719
-11
20-
320
- 7
20-1
021
- 2
2x12
19.2
13-1
014
- 4
14-1
115
- 4
15-1
016
- 3
16-
817
- 0
17-
517
- 9
18-
118
- 5
18-
919
- 1
19-
419
- 8
19-1
124
.012
-10
13-
413
-10
14-
314
- 8
15-
115
- 5
15-1
016
- 2
16-
616
-10
17-
117
- 5
17-
818
- 0
18-
318
- 6
F b12
.0 8
66 9
3710
0510
7111
3511
9812
5813
1713
7514
3214
8815
4215
9616
4917
0117
5218
02F b
16.0
954
1032
1107
1179
1250
1318
1385
1450
1514
1576
1637
1698
1757
1815
1872
1928
1984
F b19
.210
1310
9611
7612
5313
2814
0114
7215
4116
0916
7517
4018
0418
6719
2819
8920
4921
08F b
24.0
1092
1181
1267
1350
1430
1509
1585
1660
1733
1804
1874
1943
2011
2077
2143
2207
2271
Not
e:Th
e re
quire
d be
ndin
g de
sign
val
ue, F
b, in
pou
nds
per
squa
re i
nch
is s
how
n at
the
bot
tom
of
each
tab
le a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Sp
ans
are
show
n in
fee
t-inc
hes
and
are
limite
d to
26'
and
less
. C
heck
sou
rces
of
supp
ly f
or a
vaila
bilit
y of
lum
ber
in l
engt
hs g
reat
er t
han
20'.
The
gov
erni
ng b
uild
ing
code
may
req
uire
a c
heck
for
con
cent
rate
d lo
ads
for
occu
panc
ies
with
thi
sun
iform
loa
d co
nditi
on.
Span Tables for Joists and Rafters
10 Span Tables
TABL
E F-
7FL
OO
R JO
ISTS
WIT
H L
/360
DEF
LEC
TIO
N L
IMIT
S
DE
SIG
N C
RIT
ER
IA:
Def
lect
ion
- Fo
r 60
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
360
.St
reng
th -
Liv
e lo
ad o
f 60
psf
plu
s de
ad lo
adof
20
psf
dete
rmin
es t
he r
equi
red
bend
ing
desi
gn v
alue
.
Jois
tM
odul
us o
f E
last
icity
, E
, in
1,0
00,0
00 p
siS
ize
Spac
ing
(in)
(in)
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
12.0
7-
5 7
- 9
8-
0 8
- 3
8-
6 8
- 9
8-1
1 9
- 2
9-
4 9
- 7
9-
9 9
-11
10-
110
- 3
10-
510
- 7
10-
916
.0 6
- 9
7-
0 7
- 3
7-
6 7
- 9
7-1
1 8
- 2
8-
4 8
- 6
8-
8 8
-10
9-
0 9
- 2
9-
4 9
- 6
9-
7 9
- 9
2x 6
19.2
6-
4 6
- 7
6-1
0 7
- 1
7-
3 7
- 6
7-
8 7
-10
8-
0 8
- 2
8-
4 8
- 6
8-
8 8
- 9
8-1
1 9
- 0
9-
224
.0 5
-11
6-
2 6
- 4
6-
7 6
- 9
6-1
1 7
- 1
7-
3 7
- 5
7-
7 7
- 9
7-1
0 8
- 0
8-
2 8
- 3
8-
5 8
- 6
12.0
9-1
010
- 2
10-
710
-11
11-
311
- 6
11-1
012
- 1
12-
412
- 7
12-1
013
- 1
13-
413
- 6
13-
913
-11
14-
216
.0 8
-11
9-
3 9
- 7
9-1
110
- 2
10-
610
- 9
11-
011
- 3
11-
511
- 8
11-1
112
- 1
12-
312
- 6
12-
812
-10
2x 8
19.2
8-
5 8
- 9
9-
0 9
- 4
9-
7 9
-10
10-
110
- 4
10-
710
- 9
11-
011
- 2
11-
411
- 7
11-
911
-11
12-
124
.0 7
- 9
8-
1 8
- 5
8-
8 8
-11
9-
2 9
- 4
9-
7 9
-10
10-
010
- 2
10-
510
- 7
10-
910
-11
11-
111
- 3
12.0
12-
613
- 0
13-
613
-11
14-
414
- 8
15-
115
- 5
15-
916
- 1
16-
516
- 8
17-
017
- 3
17-
617
- 9
18-
016
.011
- 4
11-1
012
- 3
12-
813
- 0
13-
413
- 8
14-
014
- 4
14-
714
-11
15-
215
- 5
15-
815
-11
16-
216
- 5
2x10
19.2
10-
811
- 1
11-
611
-11
12-
312
- 7
12-1
113
- 2
13-
613
- 9
14-
014
- 3
14-
614
- 9
15-
015
- 2
15-
524
.0 9
-11
10-
410
- 8
11-
011
- 4
11-
811
-11
12-
312
- 6
12-
913
- 0
13-
313
- 6
13-
813
-11
14-
114
- 4
12.0
15-
215
-10
16-
516
-11
17-
517
-11
18-
418
- 9
19-
219
- 7
19-1
120
- 3
20-
821
- 0
21-
421
- 7
21-1
116
.013
-10
14-
414
-11
15-
415
-10
16-
316
- 8
17-
017
- 5
17-
918
- 1
18-
518
- 9
19-
119
- 4
19-
819
-11
2x12
19.2
13-
013
- 6
14-
014
- 5
14-1
115
- 3
15-
816
- 0
16-
516
- 9
17-
017
- 4
17-
817
-11
18-
318
- 6
18-
924
.012
- 1
12-
713
- 0
13-
513
-10
14-
214
- 7
14-1
115
- 2
15-
615
-10
16-
116
- 5
16-
816
-11
17-
217
- 5
F b12
.0 8
77 9
4910
1810
8411
4912
1212
7313
3313
9214
4915
0615
6116
1516
6917
2117
7318
24F b
16.0
965
1044
1120
1193
1265
1334
1402
1468
1532
1595
1657
1718
1778
1837
1894
1951
2008
F b19
.210
2611
0911
9012
6813
4414
1814
8915
5916
2816
9517
6118
2618
8919
5220
1320
7421
33F b
24.0
1105
1195
1282
1366
1448
1527
1604
1680
1754
1826
1897
1967
2035
2102
2169
2234
2298
Not
e:Th
e re
quire
d be
ndin
g de
sign
val
ue, F
b, in
pou
nds
per
squa
re i
nch
is s
how
n at
the
bot
tom
of
each
tab
le a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Sp
ans
are
show
n in
fee
t-inc
hes
and
are
limite
d to
26'
a
nd le
ss.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables 11
Span Tables for Joists and Rafters
TABL
E C
-1C
EILI
NG
JOIS
TS W
ITH
L/2
40 D
EFLE
CTI
ON
LIM
ITS
DE
SIG
N C
RIT
ER
IA:
Def
lect
ion
- Fo
r 10
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
240
.St
reng
th -
Liv
e Lo
ad o
f 10
psf
plu
sde
ad l
oad
of 5
psf
det
erm
ines
the
req
uire
d fib
er s
tress
val
ue.
Jois
tM
odul
us o
f E
last
icity
, E
, in
1,0
00,0
00 p
siS
ize
Spac
ing
(in)
(in)
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
12.0
9-1
010
- 3
10-
710
-11
11-
311
- 7
11-1
012
- 2
12-
512
- 8
12-1
113
- 2
13-
413
- 7
13-
914
- 0
14-
216
.0 8
-11
9-
4 9
- 8
9-1
110
- 3
10-
610
- 9
11-
011
- 3
11-
611
- 9
11-1
112
- 2
12-
412
- 6
12-
912
-11
2x 4
19.2
8-
5 8
- 9
9-
1 9
- 4
9-
8 9
-11
10-
210
- 4
10-
710
-10
11-
011
- 3
11-
511
- 7
11-
912
- 0
12-
224
.0 7
-10
8-
1 8
- 5
8-
8 8
-11
9-
2 9
- 5
9-
8 9
-10
10-
010
- 3
10-
510
- 7
10-
910
-11
11-
111
- 3
12.0
15-
616
- 1
16-
817
- 2
17-
818
- 2
18-
819
- 1
19-
619
-11
20-
320
- 8
21-
021
- 4
21-
822
- 0
22-
416
.014
- 1
14-
715
- 2
15-
716
- 1
16-
616
-11
17-
417
- 8
18-
118
- 5
18-
919
- 1
19-
519
- 8
20-
020
- 3
2x 6
19.2
13-
313
- 9
14-
314
- 8
15-
215
- 7
15-1
116
- 4
16-
817
- 0
17-
417
- 8
17-1
118
- 3
18-
618
-10
19-
124
.012
- 3
12-
913
- 3
13-
814
- 1
14-
514
- 9
15-
215
- 6
15-
916
- 1
16-
416
- 8
16-1
117
- 2
17-
517
- 8
12.0
20-
521
- 2
21-1
122
- 8
23-
424
- 0
24-
725
- 2
25-
816
.018
- 6
19-
319
-11
20-
721
- 2
21-
922
- 4
22-1
023
- 4
23-1
024
- 3
24-
825
- 2
25-
725
-11
2x 8
19.2
17-
518
- 1
18-
919
- 5
19-1
120
- 6
21-
021
- 6
21-1
122
- 5
22-1
023
- 3
23-
824
- 0
24-
524
- 9
25-
224
.016
- 2
16-1
017
- 5
18-
018
- 6
19-
019
- 6
19-1
120
- 5
20-1
021
- 2
21-
721
-11
22-
422
- 8
23-
023
- 4
12.0
26-
016
.023
- 8
24-
725
- 5
2x10
19.2
22-
323
- 1
23-1
124
- 9
25-
524
.020
- 8
21-
622
- 3
22-1
123
- 8
24-
324
-10
25-
526
- 0
F b12
.0 7
11 7
69 8
25 8
80 9
32 9
8310
3310
8211
2911
7612
2112
6613
1013
5413
9614
3814
80F b
16.0
783
847
909
968
1026
1082
1137
1191
1243
1294
1344
1394
1442
1490
1537
1583
1629
F b19
.2 8
32 9
00 9
6510
2910
9011
5012
0812
6513
2113
7514
2914
8115
3315
8316
3316
8217
31F b
24.0
896
969
1040
1108
1174
1239
1302
1363
1423
1481
1539
1595
1651
1706
1759
1812
1864
Not
e:Th
e re
quire
d be
ndin
g de
sign
val
ue, F
b, in
pou
nds
per
squa
re i
nch
is s
how
n at
the
bot
tom
of
each
tab
le a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Sp
ans
are
show
n in
fee
t-inc
hes
and
are
limite
d to
26'
and
less
. C
heck
sou
rces
of
supp
ly f
or a
vaila
bilit
y of
lum
ber
in l
engt
hs g
reat
er t
han
20'.
Span Tables for Joists and Rafters
12 Span Tables
TABL
E C
-2C
EILI
NG
JOIS
TS W
ITH
L/2
40 D
EFLE
CTI
ON
LIM
ITS
DE
SIG
N C
RIT
ER
IA:
Def
lect
ion
- Fo
r 20
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
240
.St
reng
th -
Liv
e Lo
ad o
f 20
psf
plu
sde
ad lo
ad o
f 10
psf
det
erm
ines
the
requ
ired
bend
ing
desi
gn v
alue
.
Jois
tM
odul
us o
f E
last
icity
, E
, in
1,0
00,0
00 p
siS
ize
Spac
ing
(in)
(in)
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
12.0
7-1
0 8
- 1
8-
5 8
- 8
8-1
1 9
- 2
9-
5 9
- 8
9-1
010
- 0
10-
310
- 5
10-
710
- 9
10-1
111
- 1
11-
316
.0 7
- 1
7-
5 7
- 8
7-1
1 8
- 1
8-
4 8
- 7
8-
9 8
-11
9-
1 9
- 4
9-
6 9
- 8
9-
9 9
-11
10-
110
- 3
2x 4
19.2
6-
8 6
-11
7-
2 7
- 5
7-
8 7
-10
8-
1 8
- 3
8-
5 8
- 7
8-
9 8
-11
9-
1 9
- 3
9-
4 9
- 6
9-
824
.0 6
- 2
6-
5 6
- 8
6-1
1 7
- 1
7-
3 7
- 6
7-
8 7
-10
8-
0 8
- 1
8-
3 8
- 5
8-
7 8
- 8
8-1
0 8
-11
12.0
12-
312
- 9
13-
313
- 8
14-
114
- 5
14-
915
- 2
15-
615
- 9
16-
116
- 4
16-
816
-11
17-
217
- 5
17-
816
.011
- 2
11-
712
- 0
12-
512
- 9
13-
113
- 5
13-
914
- 1
14-
414
- 7
14-1
115
- 2
15-
515
- 7
15-1
016
- 1
2x 6
19.2
10-
610
-11
11-
411
- 8
12-
012
- 4
12-
812
-11
13-
313
- 6
13-
914
- 0
14-
314
- 6
14-
814
-11
15-
224
.0 9
- 9
10-
210
- 6
10-1
011
- 2
11-
511
- 9
12-
012
- 3
12-
612
- 9
13-
013
- 3
13-
513
- 8
13-1
014
- 1
12.0
16-
216
-10
17-
518
- 0
18-
619
- 0
19-
619
-11
20-
520
-10
21-
221
- 7
21-1
122
- 4
22-
823
- 0
23-
416
.014
- 8
15-
315
-10
16-
416
-10
17-
317
- 9
18-
118
- 6
18-1
119
- 3
19-
719
-11
20-
320
- 7
20-1
121
- 2
2x 8
19.2
13-1
014
- 5
14-1
115
- 5
15-1
016
- 3
16-
817
- 1
17-
517
- 9
18-
118
- 5
18-
919
- 1
19-
519
- 8
19-1
124
.012
-10
13-
413
-10
14-
314
- 8
15-
115
- 6
15-1
016
- 2
16-
616
-10
17-
217
- 5
17-
918
- 0
18-
318
- 6
12.0
20-
821
- 6
22-
322
-11
23-
824
- 3
24-1
025
- 5
26-
016
.018
- 9
19-
620
- 2
20-1
021
- 6
22-
122
- 7
23-
123
- 8
24-
124
- 7
25-
025
- 5
25-1
02x
1019
.217
- 8
18-
419
- 0
19-
720
- 2
20-
921
- 3
21-
922
- 3
22-
823
- 1
23-
723
-11
24-
424
- 9
25-
125
- 5
24.0
16-
517
- 0
17-
818
- 3
18-
919
- 3
19-
920
- 2
20-
821
- 1
21-
621
-10
22-
322
- 7
22-1
123
- 4
23-
8
F b12
.0 8
96 9
6910
4011
0811
7412
3913
0213
6314
2314
8115
3915
9516
5117
0617
5918
1218
64F b
16.0
986
1067
1145
1220
1293
1364
1433
1500
1566
1631
1694
1756
1817
1877
1936
1995
2052
F b19
.210
4811
3412
1612
9613
7414
4915
2215
9416
6417
3318
0018
6619
3119
9520
5821
2021
81F b
24.0
1129
1221
1310
1396
1480
1561
1640
1717
1793
1866
1939
2010
2080
2149
2217
2283
2349
Not
e:Th
e re
quire
d be
ndin
g de
sign
val
ue, F
b, in
pou
nds
per
squa
re i
nch
is s
how
n at
the
bot
tom
of
each
tab
le a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Sp
ans
are
show
n in
fee
t-inc
hes
and
are
limite
d to
26'
and
less
.Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables 13
Span Tables for Joists and Rafters
TABL
E R
-1R
AFT
ERS W
ITH
L/2
40 D
EFLE
CTI
ON
LIM
ITA
TIO
N
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
20 p
sf p
lus
Dea
d Lo
ad o
f 10
psf
det
erm
ines
the
req
uire
d be
ndin
g de
sign
val
ue.
Def
lect
ion
- Fo
r 20
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
240
.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n) 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
00
12.0
7-
1 8
- 2
9-
210
- 0
10-1
011
- 7
12-
413
- 0
13-
714
- 2
14-
915
- 4
15-1
116
- 5
16-1
117
- 5
17-1
016
.0 6
- 2
7-
1 7
-11
8-
8 9
- 5
10-
010
- 8
11-
311
- 9
12-
412
-10
13-
313
- 9
14-
214
- 8
15-
115
- 6
15-1
116
- 3
2x 6
19.2
5-
7 6
- 6
7-
3 7
-11
8-
7 9
- 2
9-
910
- 3
10-
911
- 3
11-
812
- 2
12-
713
- 0
13-
413
- 9
14-
214
- 6
14-1
015
- 2
15-
724
.0 5
- 0
5-1
0 6
- 6
7-
1 7
- 8
8-
2 8
- 8
9-
2 9
- 7
10-
010
- 5
10-1
011
- 3
11-
711
-11
12-
412
- 8
13-
013
- 3
13-
713
-11
14-
2
12.0
9-
410
-10
12-
113
- 3
14-
415
- 3
16-
317
- 1
17-1
118
- 9
19-
620
- 3
20-1
121
- 7
22-
322
-11
23-
716
.0 8
- 1
9-
410
- 6
11-
612
- 5
13-
314
- 0
14-1
015
- 6
16-
316
-10
17-
618
- 1
18-
919
- 4
19-1
020
- 5
20-1
121
- 5
2x 8
19.2
7-
5 8
- 7
9-
710
- 6
11-
412
- 1
12-1
013
- 6
14-
214
-10
15-
516
- 0
16-
717
- 1
17-
718
- 1
18-
719
- 1
19-
720
- 0
20-
624
.0 6
- 7
7-
8 8
- 7
9-
410
- 1
10-1
011
- 6
12-
112
- 8
13-
313
- 9
14-
414
-10
15-
315
- 9
16-
316
- 8
17-
117
- 6
17-1
118
- 4
18-
9
12.0
11-1
113
- 9
15-
516
-11
18-
319
- 6
20-
821
-10
22-1
023
-11
24-1
025
-10
16.0
10-
411
-11
13-
414
- 8
15-1
016
-11
17-1
118
-11
19-1
020
- 8
21-
622
- 4
23-
123
-11
24-
725
- 4
26-
02x
1019
.2 9
- 5
10-1
112
- 2
13-
414
- 5
15-
516
- 4
17-
318
- 1
18-1
119
- 8
20-
521
- 1
21-1
022
- 6
23-
123
- 9
24-
525
- 0
25-
724
.0 8
- 5
9-
910
-11
11-1
112
-11
13-
914
- 8
15-
516
- 2
16-1
117
- 7
18-
318
-11
19-
620
- 1
20-
821
- 3
21-1
022
- 4
22-1
023
- 5
23-1
1
12.0
14-
616
- 9
18-
920
- 6
22-
223
- 9
25-
216
.012
- 7
14-
616
- 3
17-
919
- 3
20-
621
- 9
23-
024
- 1
25-
22x
1219
.211
- 6
13-
314
-10
16-
317
- 6
18-
919
-11
21-
022
- 0
23-
023
-11
24-1
025
- 8
24.0
10-
311
-10
13-
314
- 6
15-
816
- 9
17-
918
- 9
19-
820
- 6
21-
522
- 2
23-
023
- 9
24-
525
- 2
25-1
0
E12
.00.
150.
240.
330.
440.
550.
670.
800.
941.
091.
241.
401.
561.
731.
912.
092.
282.
47E
16.0
0.13
0.21
0.29
0.38
0.48
0.58
0.70
0.82
0.94
1.07
1.21
1.35
1.50
1.65
1.81
1.97
2.14
2.31
2.48
E19
.20.
120.
190.
260.
350.
440.
530.
640.
750.
860.
981.
101.
231.
371.
511.
651.
801.
952.
112.
272.
432.
60E
24.0
0.11
0.17
0.24
0.31
0.39
0.48
0.57
0.67
0.77
0.88
0.99
1.10
1.22
1.35
1.48
1.61
1.75
1.89
2.03
2.18
2.33
2.48
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.C
heck
sou
rces
of
supp
ly f
or a
vaila
bilit
y of
lum
ber
in l
engt
hs g
reat
er t
han
20'.
Span Tables for Joists and Rafters
14 Span Tables
TABL
E R
-2R
AFT
ERS W
ITH
L/2
40 D
EFLE
CTI
ON
LIM
ITA
TIO
N
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
30 p
sf p
lus
Dea
d Lo
ad o
f 10
psf
det
erm
ines
the
req
uire
d be
ndin
g de
sign
val
ue.
Def
lect
ion
- Fo
r 30
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
240
.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n) 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
00
12.0
6-
2 7
- 1
7-1
1 8
- 8
9-
510
- 0
10-
811
- 3
11-
912
- 4
12-1
013
- 3
13-
914
- 2
14-
815
- 1
15-
615
-11
16.0
5-
4 6
- 2
6-1
0 7
- 6
8-
2 8
- 8
9-
3 9
- 9
10-
210
- 8
11-
111
- 6
11-1
112
- 4
12-
813
- 1
13-
513
- 9
14-
114
- 5
2x 6
19.2
4-1
0 5
- 7
6-
3 6
-10
7-
5 7
-11
8-
5 8
-11
9-
4 9
- 9
10-
110
- 6
10-1
011
- 3
11-
711
-11
12-
312
- 7
12-1
013
- 2
13-
624
.0 4
- 4
5-
0 5
- 7
6-
2 6
- 8
7-
1 7
- 6
7-1
1 8
- 4
8-
8 9
- 1
9-
5 9
- 9
10-
010
- 4
10-
810
-11
11-
311
- 6
11-
912
- 0
12-
4
12.0
8-
1 9
- 4
10-
611
- 6
12-
513
- 3
14-
014
-10
15-
616
- 3
16-1
017
- 6
18-
118
- 9
19-
419
-10
20-
520
-11
16.0
7-
0 8
- 1
9-
1 9
-11
10-
911
- 6
12-
212
-10
13-
514
- 0
14-
715
- 2
15-
816
- 3
16-
917
- 2
17-
818
- 1
18-
719
- 0
2x 8
19.2
6-
5 7
- 5
8-
3 9
- 1
9-
910
- 6
11-
111
- 8
12-
312
-10
13-
413
-10
14-
414
-10
15-
315
- 8
16-
216
- 7
16-1
117
- 4
17-
924
.0 5
- 9
6-
7 7
- 5
8-
1 8
- 9
9-
4 9
-11
10-
611
- 0
11-
611
-11
12-
512
-10
13-
313
- 8
14-
014
- 5
14-1
015
- 2
15-
615
-10
16-
3
12.0
10-
411
-11
13-
414
- 8
15-1
016
-11
17-1
118
-11
19-1
020
- 8
21-
622
- 4
23-
123
-11
24-
725
- 4
26-
016
.0 8
-11
10-
411
- 7
12-
813
- 8
14-
815
- 6
16-
417
- 2
17-1
118
- 8
19-
420
- 0
20-
821
- 4
21-1
122
- 6
23-
123
- 8
24-
32x
1019
.2 8
- 2
9-
510
- 7
11-
712
- 6
13-
414
- 2
14-1
115
- 8
16-
417
- 0
17-
818
- 3
18-1
119
- 6
20-
020
- 7
21-
121
- 8
22-
222
- 8
24.0
7-
4 8
- 5
9-
510
- 4
11-
211
-11
12-
813
- 4
14-
014
- 8
15-
315
-10
16-
416
-11
17-
517
-11
18-
518
-11
19-
419
-10
20-
320
- 8
12.0
12-
714
- 6
16-
317
- 9
19-
320
- 6
21-
923
- 0
24-
125
- 2
16.0
10-1
112
- 7
14-
115
- 5
16-
817
- 9
18-1
019
-11
20-1
021
- 9
22-
823
- 6
24-
425
- 2
25-1
12x
1219
.2 9
-11
11-
612
-10
14-
115
- 2
16-
317
- 3
18-
219
- 0
19-1
120
- 8
21-
622
- 3
23-
023
- 8
24-
425
- 0
25-
824
.0 8
-11
10-
311
- 6
12-
713
- 7
14-
615
- 5
16-
317
- 0
17-
918
- 6
19-
319
-11
20-
621
- 2
21-
922
- 5
23-
023
- 6
24-
124
- 8
25-
2
E12
.00.
150.
230.
320.
430.
540.
660.
780.
921.
061.
211.
361.
521.
691.
862.
042.
222.
412.
60E
16.0
0.13
0.20
0.28
0.37
0.47
0.57
0.68
0.80
0.92
1.05
1.18
1.32
1.46
1.61
1.76
1.92
2.08
2.25
2.42
2.60
E19
.20.
120.
180.
260.
340.
430.
520.
620.
730.
840.
951.
081.
201.
331.
471.
611.
751.
902.
052.
212.
372.
53E
24.0
0.11
0.16
0.23
0.30
0.38
0.46
0.55
0.65
0.75
0.85
0.96
1.08
1.19
1.31
1.44
1.57
1.70
1.84
1.98
2.12
2.27
2.41
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables 15
Span Tables for Joists and Rafters
TABL
E R
-3R
AFT
ERS W
ITH
L/2
40 D
EFLE
CTI
ON
LIM
ITA
TIO
N
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
40 p
sf p
lus
Dea
d Lo
ad o
f 10
psf
det
erm
ines
the
req
uire
d be
ndin
g de
sign
val
ue.
Def
lect
ion
- Fo
r 40
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
240
.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n) 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
00
12.0
5-
6 6
- 4
7-
1 7
- 9
8-
5 9
- 0
9-
610
- 0
10-
611
- 0
11-
511
-11
12-
412
- 8
13-
113
- 6
13-1
014
- 2
16.0
4-
9 5
- 6
6-
2 6
- 9
7-
3 7
- 9
8-
3 8
- 8
9-
1 9
- 6
9-1
110
- 3
10-
811
- 0
11-
411
- 8
12-
012
- 4
12-
712
-11
2x 6
19.2
4-
4 5
- 0
5-
7 6
- 2
6-
8 7
- 1
7-
6 7
-11
8-
4 8
- 8
9-
1 9
- 5
9-
910
- 0
10-
410
- 8
10-1
111
- 3
11-
611
- 9
12-
012
- 4
24.0
3-1
1 4
- 6
5-
0 5
- 6
5-1
1 6
- 4
6-
9 7
- 1
7-
5 7
- 9
8-
1 8
- 5
8-
8 9
- 0
9-
3 9
- 6
9-
910
- 0
10-
310
- 6
10-
911
- 0
12.0
7-
3 8
- 4
9-
410
- 3
11-
111
-10
12-
713
- 3
13-1
114
- 6
15-
115
- 8
16-
316
- 9
17-
317
- 9
18-
318
- 9
16.0
6-
3 7
- 3
8-
1 8
-11
9-
710
- 3
10-1
011
- 6
12-
012
- 7
13-
113
- 7
14-
014
- 6
14-1
115
- 5
15-1
016
- 3
16-
717
- 0
2x 8
19.2
5-
9 6
- 7
7-
5 8
- 1
8-
9 9
- 4
9-1
110
- 6
11-
011
- 6
11-1
112
- 5
12-1
013
- 3
13-
814
- 0
14-
514
-10
15-
215
- 6
15-1
016
- 3
24.0
5-
2 5
-11
6-
7 7
- 3
7-1
0 8
- 4
8-1
1 9
- 4
9-1
010
- 3
10-
811
- 1
11-
611
-10
12-
212
- 7
12-1
113
- 3
13-
713
-11
14-
214
- 6
12.0
9-
310
- 8
11-1
113
- 1
14-
215
- 1
16-
016
-11
17-
918
- 6
19-
320
- 0
20-
821
- 4
22-
022
- 8
23-
323
-11
16.0
8-
0 9
- 3
10-
411
- 4
12-
313
- 1
13-1
014
- 8
15-
416
- 0
16-
817
- 4
17-1
118
- 6
19-
119
- 7
20-
220
- 8
21-
221
- 8
2x10
19.2
7-
4 8
- 5
9-
510
- 4
11-
211
-11
12-
813
- 4
14-
014
- 8
15-
315
-10
16-
416
-11
17-
517
-11
18-
518
-11
19-
419
-10
20-
320
- 8
24.0
6-
6 7
- 7
8-
5 9
- 3
10-
010
- 8
11-
411
-11
12-
613
- 1
13-
714
- 2
14-
815
- 1
15-
716
- 0
16-
616
-11
17-
417
- 9
18-
118
- 6
12.0
11-
313
- 0
14-
615
-11
17-
218
- 4
19-
620
- 6
21-
722
- 6
23-
524
- 4
25-
226
- 0
16.0
9-
911
- 3
12-
713
- 9
14-1
115
-11
16-1
017
- 9
18-
819
- 6
20-
321
- 1
21-
922
- 6
23-
223
-10
24-
625
- 2
25-
92x
1219
.2 8
-11
10-
311
- 6
12-
713
- 7
14-
615
- 5
16-
317
- 0
17-
918
- 6
19-
319
-11
20-
621
- 2
21-
922
- 5
23-
023
- 6
24-
124
- 8
25-
224
.0 7
-11
9-
210
- 3
11-
312
- 2
13-
013
- 9
14-
615
- 3
15-1
116
- 7
17-
217
- 9
18-
418
-11
19-
620
- 0
20-
621
- 1
21-
722
- 0
22-
6
E12
.00.
140.
220.
310.
410.
510.
630.
750.
881.
011.
151.
301.
451.
611.
771.
942.
122.
302.
48E
16.0
0.12
0.19
0.27
0.35
0.44
0.54
0.65
0.76
0.88
1.00
1.12
1.26
1.39
1.54
1.68
1.83
1.99
2.15
2.31
2.48
E19
.20.
110.
180.
240.
320.
410.
500.
590.
690.
800.
911.
031.
151.
271.
401.
541.
671.
811.
962.
112.
262.
422.
58E
24.0
0.10
0.16
0.22
0.29
0.36
0.44
0.53
0.62
0.71
0.81
0.92
1.03
1.14
1.25
1.37
1.50
1.62
1.75
1.89
2.02
2.16
2.30
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables for Joists and Rafters
16 Span Tables
TABL
E R
- 4R
AFT
ERS W
ITH
L/2
40 D
EFLE
CTI
ON
LIM
ITS
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
50 p
sf p
lus
dead
loa
dof
10
psf
dete
rmin
es t
he r
equi
red
bend
ing
desi
gn v
alue
.D
efle
ctio
n -
For
50 p
sf l
ive
load
.Li
mite
d to
spa
n in
inc
hes
divi
ded
by 2
40.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n) 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
00
12.0
5-
0 5
-10
6-
6 7
- 1
7-
8 8
- 2
8-
8 9
- 2
9-
710
- 0
10-
510
-10
11-
311
- 7
11-1
112
- 4
12-
813
- 0
13-
316
.0 4
- 4
5-
0 5
- 7
6-
2 6
- 8
7-
1 7
- 6
7-1
1 8
- 4
8-
8 9
- 1
9-
5 9
- 9
10-
010
- 4
10-
810
-11
11-
311
- 6
11-
912
- 0
2x 6
19.2
4-
0 4
- 7
5-
1 5
- 7
6-
1 6
- 6
6-1
0 7
- 3
7-
7 7
-11
8-
3 8
- 7
8-1
1 9
- 2
9-
5 9
- 9
10-
010
- 3
10-
610
- 9
11-
011
- 3
24.0
3-
7 4
- 1
4-
7 5
- 0
5-
5 5
-10
6-
2 6
- 6
6-1
0 7
- 1
7-
5 7
- 8
7-1
1 8
- 2
8-
5 8
- 8
8-1
1 9
- 2
9-
5 9
- 7
9-1
010
- 0
12.0
6-
7 7
- 8
8-
7 9
- 4
10-
110
-10
11-
612
- 1
12-
813
- 3
13-
914
- 4
14-1
015
- 3
15-
916
- 3
16-
817
- 1
17-
616
.0 5
- 9
6-
7 7
- 5
8-
1 8
- 9
9-
4 9
-11
10-
611
- 0
11-
611
-11
12-
512
-10
13-
313
- 8
14-
014
- 5
14-1
015
- 2
15-
615
-10
2x 8
19.2
5-
3 6
- 0
6-
9 7
- 5
8-
0 8
- 7
9-
1 9
- 7
10-
010
- 6
10-1
111
- 4
11-
812
- 1
12-
512
-10
13-
213
- 6
13-1
014
- 2
14-
614
-10
24.0
4-
8 5
- 5
6-
0 6
- 7
7-
2 7
- 8
8-
1 8
- 7
9-
0 9
- 4
9-
910
- 1
10-
610
-10
11-
211
- 6
11-
912
- 1
12-
512
- 8
12-1
113
- 3
12.0
8-
5 9
- 9
10-1
111
-11
12-1
113
- 9
14-
815
- 5
16-
216
-11
17-
718
- 3
18-1
119
- 6
20-
120
- 8
21-
321
-10
22-
416
.0 7
- 4
8-
5 9
- 5
10-
411
- 2
11-1
112
- 8
13-
414
- 0
14-
815
- 3
15-1
016
- 4
16-1
117
- 5
17-1
118
- 5
18-1
119
- 4
19-1
020
- 3
2x10
19.2
6-
8 7
- 8
8-
7 9
- 5
10-
210
-11
11-
712
- 2
12-
913
- 4
13-1
114
- 5
14-1
115
- 5
15-1
116
- 4
16-1
017
- 3
17-
818
- 1
18-
618
-11
24.0
6-
0 6
-11
7-
8 8
- 5
9-
1 9
- 9
10-
410
-11
11-
511
-11
12-
512
-11
13-
413
- 9
14-
314
- 8
15-
015
- 5
15-1
016
- 2
16-
616
-11
12.0
10-
311
-10
13-
314
- 6
15-
816
- 9
17-
918
- 9
19-
820
- 6
21-
522
- 2
23-
023
- 9
24-
525
- 2
25-1
016
.0 8
-11
10-
311
- 6
12-
713
- 7
14-
615
- 5
16-
317
- 0
17-
918
- 6
19-
319
-11
20-
621
- 2
21-
922
- 5
23-
023
- 6
24-
124
- 8
2x12
19.2
8-
1 9
- 4
10-
611
- 6
12-
513
- 3
14-
114
-10
15-
716
- 3
16-1
117
- 6
18-
218
- 9
19-
419
-11
20-
521
- 0
21-
622
- 0
22-
623
- 0
24.0
7-
3 8
- 5
9-
410
- 3
11-
111
-10
12-
713
- 3
13-1
114
- 6
15-
115
- 8
16-
316
- 9
17-
317
- 9
18-
318
- 9
19-
319
- 8
20-
120
- 6
E12
.00.
140.
210.
290.
390.
490.
600.
710.
830.
961.
101.
241.
381.
531.
691.
852.
012.
182.
362.
54E
16.0
0.12
0.18
0.26
0.34
0.42
0.52
0.62
0.72
0.83
0.95
1.07
1.20
1.33
1.46
1.60
1.74
1.89
2.04
2.20
2.35
2.52
E19
.20.
110.
170.
230.
310.
390.
470.
560.
660.
760.
870.
981.
091.
211.
331.
461.
591.
731.
862.
002.
152.
302.
45E
24.0
0.10
0.15
0.21
0.27
0.35
0.42
0.50
0.59
0.68
0.77
0.87
0.98
1.08
1.19
1.31
1.42
1.54
1.67
1.79
1.92
2.06
2.19
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables 17
Span Tables for Joists and Rafters
TABL
E R
-5R
AFT
ERS W
ITH
L/2
40 D
EFLE
CTI
ON
LIM
ITA
TIO
N
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
20 p
sf p
lus
Dea
d Lo
ad o
f 15
psf
det
erm
ines
the
req
uire
d be
ndin
g de
sign
val
ue.
Def
lect
ion
- Fo
r 20
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
240
.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n)30
0 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
00
12.0
6-
7 7
- 7
8-
6 9
- 4
10-
010
- 9
11-
512
- 0
12-
713
- 2
13-
814
- 2
14-
815
- 2
15-
816
- 1
16-
717
- 0
17-
517
-10
16.0
5-
8 6
- 7
7-
4 8
- 1
8-
8 9
- 4
9-1
010
- 5
10-1
111
- 5
11-1
012
- 4
12-
913
- 2
13-
713
-11
14-
414
- 8
15-
115
- 5
15-
916
- 1
16-
52x
619
.2 5
- 2
6-
0 6
- 9
7-
4 7
-11
8-
6 9
- 0
9-
6 9
-11
10-
510
-10
11-
311
- 7
12-
012
- 4
12-
913
- 1
13-
513
- 9
14-
114
- 5
14-
815
- 0
15-
424
.0 4
- 8
5-
4 6
- 0
6-
7 7
- 1
7-
7 8
- 1
8-
6 8
-11
9-
4 9
- 8
10-
010
- 5
10-
911
- 1
11-
511
- 8
12-
012
- 4
12-
712
-10
13-
213
- 5
13-
813
-11
12.0
8-
810
- 0
11-
212
- 3
13-
314
- 2
15-
015
-10
16-
717
- 4
18-
018
- 9
19-
520
- 0
20-
821
- 3
21-1
022
- 4
22-1
123
- 6
16.0
7-
6 8
- 8
9-
810
- 7
11-
612
- 3
13-
013
- 8
14-
415
- 0
15-
716
- 3
16-
917
- 4
17-1
018
- 5
18-1
119
- 5
19-1
020
- 4
20-
921
- 3
21-
82x
819
.2 6
-10
7-1
1 8
-10
9-
810
- 6
11-
211
-10
12-
613
- 1
13-
814
- 3
14-1
015
- 4
15-1
016
- 4
16-
917
- 3
17-
818
- 1
18-
719
- 0
19-
519
- 9
20-
224
.0 6
- 2
7-
1 7
-11
8-
8 9
- 4
10-
010
- 7
11-
211
- 9
12-
312
- 9
13-
313
- 8
14-
214
- 7
15-
015
- 5
15-1
016
- 3
16-
717
- 0
17-
417
- 8
18-
018
- 5
12.0
11-
112
- 9
14-
315
- 8
16-1
118
- 1
19-
220
- 2
21-
222
- 1
23-
023
-11
24-
925
- 6
16.0
9-
711
- 1
12-
413
- 6
14-
815
- 8
16-
717
- 6
18-
419
- 2
19-1
120
- 8
21-
522
- 1
22-1
023
- 5
24-
124
- 9
25-
425
-11
2x10
19.2
8-
910
- 1
11-
312
- 4
13-
414
- 3
15-
215
-11
16-
917
- 6
18-
218
-11
19-
720
- 2
20-1
021
- 5
22-
022
- 7
23-
123
- 8
24-
224
- 9
25-
325
- 9
24.0
7-1
0 9
- 0
10-
111
- 1
11-1
112
- 9
13-
614
- 3
15-
015
- 8
16-
316
-11
17-
618
- 1
18-
719
- 2
19-
820
- 2
20-
821
- 2
21-
822
- 1
22-
723
- 0
23-
5
12.0
13-
515
- 6
17-
419
- 0
20-
621
-11
23-
324
- 7
25-
916
.011
- 8
13-
515
- 0
16-
617
- 9
19-
020
- 2
21-
322
- 4
23-
324
- 3
25-
226
- 0
2x12
19.2
10-
812
- 3
13-
915
- 0
16-
317
- 4
18-
519
- 5
20-
421
- 3
22-
223
- 0
23-
924
- 7
25-
426
- 0
24.0
9-
611
- 0
12-
313
- 5
14-
615
- 6
16-
617
- 4
18-
219
- 0
19-1
020
- 6
21-
321
-11
22-
823
- 3
23-1
124
- 7
25-
225
- 9
E12
.00.
120.
190.
260.
350.
440.
540.
640.
750.
860.
981.
111.
241.
371.
511.
661.
811.
962.
122.
282.
44E
16.0
0.11
0.16
0.23
0.30
0.38
0.46
0.55
0.65
0.75
0.85
0.96
1.07
1.19
1.31
1.44
1.56
1.70
1.83
1.97
2.11
2.26
2.41
2.56
E19
.20.
100.
150.
210.
270.
350.
420.
510.
590.
680.
780.
880.
981.
091.
201.
311.
431.
551.
671.
801.
932.
062.
202.
342.
48E
24.0
0.09
0.13
0.19
0.25
0.31
0.38
0.45
0.53
0.61
0.70
0.78
0.88
0.97
1.07
1.17
1.28
1.39
1.50
1.61
1.73
1.85
1.97
2.09
2.22
2.35
Not
e:Th
e re
qui re
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables for Joists and Rafters
18 Span Tables
TABL
E R
-6R
AFT
ERS W
ITH
L/2
40 D
EFLE
CTI
ON
LIM
ITA
TIO
N
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
30 p
sf p
lus
Dea
d Lo
ad o
f 15
psf
det
erm
ines
the
req
uire
d be
ndin
g de
sign
val
ue.
Def
lect
ion
- Fo
r 30
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
240
.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n)30
0 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
00
12.0
5-1
0 6
- 8
7-
6 8
- 2
8-1
0 9
- 6
10-
010
- 7
11-
111
- 7
12-
112
- 6
13-
013
- 5
13-1
014
- 2
14-
715
- 0
15-
415
- 8
16.0
5-
0 5
-10
6-
6 7
- 1
7-
8 8
- 2
8-
8 9
- 2
9-
710
- 0
10-
510
-10
11-
311
- 7
11-1
112
- 4
12-
813
- 0
13-
313
- 7
13-1
114
- 2
2x 6
19.2
4-
7 5
- 4
5-1
1 6
- 6
7-
0 7
- 6
7-1
1 8
- 4
8-
9 9
- 2
9-
6 9
-11
10-
310
- 7
10-1
111
- 3
11-
611
-10
12-
212
- 5
12-
813
- 0
13-
313
- 6
24.0
4-
1 4
- 9
5-
4 5
-10
6-
3 6
- 8
7-
1 7
- 6
7-1
0 8
- 2
8-
6 8
-10
9-
2 9
- 6
9-
910
- 0
10-
410
- 7
10-1
011
- 1
11-
411
- 7
11-1
012
- 1
12-
4
12.0
7-
8 8
-10
9-1
010
-10
11-
812
- 6
13-
313
-11
14-
815
- 3
15-1
116
- 6
17-
117
- 8
18-
218
- 9
19-
319
- 9
20-
320
- 8
16.0
6-
7 7
- 8
8-
7 9
- 4
10-
110
-10
11-
612
- 1
12-
813
- 3
13-
914
- 4
14-1
015
- 3
15-
916
- 3
16-
817
- 1
17-
617
-11
18-
418
- 9
2x 8
19.2
6-
0 7
- 0
7-1
0 8
- 7
9-
3 9
-10
10-
611
- 0
11-
712
- 1
12-
713
- 1
13-
613
-11
14-
514
-10
15-
215
- 7
16-
016
- 4
16-
917
- 1
17-
517
- 9
24.0
5-
5 6
- 3
7-
0 7
- 8
8-
3 8
-10
9-
4 9
-10
10-
410
-10
11-
311
- 8
12-
112
- 6
12-1
013
- 3
13-
713
-11
14-
414
- 8
15-
015
- 3
15-
715
-11
16-
3
12.0
9-
911
- 3
12-
713
- 9
14-1
115
-11
16-1
117
-10
18-
819
- 6
20-
421
- 1
21-1
022
- 6
23-
323
-11
24-
625
- 2
25-1
016
.0 8
- 5
9-
910
-11
11-1
112
-11
13-
914
- 8
15-
516
- 2
16-1
117
- 7
18-
318
-11
19-
620
- 1
20-
821
- 3
21-1
022
- 4
22-1
023
- 5
23-1
12x
1019
.2 7
- 8
8-1
1 9
-11
10-1
111
- 9
12-
713
- 4
14-
114
- 9
15-
516
- 1
16-
817
- 3
17-1
018
- 4
18-1
119
- 5
19-1
120
- 5
20-1
021
- 4
21-1
022
- 3
22-
824
.0 6
-11
8-
0 8
-11
9-
910
- 6
11-
311
-11
12-
713
- 2
13-
914
- 4
14-1
115
- 5
15-1
116
- 5
16-1
117
- 4
17-1
018
- 3
18-
819
- 1
19-
619
-11
20-
420
- 8
12.0
11-1
013
- 8
15-
416
- 9
18-
119
- 4
20-
621
- 8
22-
823
- 9
24-
825
- 7
16.0
10-
311
-10
13-
314
- 6
15-
816
- 9
17-
918
- 9
19-
820
- 6
21-
522
- 2
23-
023
- 9
24-
525
- 2
25-1
02x
1219
.2 9
- 4
10-1
012
- 1
13-
314
- 4
15-
416
- 3
17-
117
-11
18-
919
- 6
20-
321
- 0
21-
822
- 4
23-
023
- 7
24-
224
-10
25-
525
-11
24.0
8-
5 9
- 8
10-1
011
-10
12-1
013
- 8
14-
615
- 4
16-
116
- 9
17-
518
- 1
18-
919
- 4
20-
020
- 6
21-
121
- 8
22-
222
- 8
23-
323
- 9
24-
224
- 8
25-
2
E12
.00.
130.
190.
270.
360.
450.
550.
660.
770.
891.
011.
141.
281.
411.
561.
711.
862.
022.
182.
342.
51E
16.0
0.11
0.17
0.24
0.31
0.39
0.48
0.57
0.67
0.77
0.88
0.99
1.10
1.22
1.35
1.48
1.61
1.75
1.89
2.03
2.18
2.33
2.48
E19
.20.
100.
150.
220.
280.
360.
440.
520.
610.
700.
800.
901.
011.
121.
231.
351.
471.
591.
721.
851.
992.
122.
262.
412.
55E
24.0
0.09
0.14
0.19
0.25
0.32
0.39
0.46
0.54
0.63
0.72
0.81
0.90
1.00
1.10
1.21
1.31
1.43
1.54
1.66
1.78
1.90
2.02
2.15
2.28
2.41
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables 19
Span Tables for Joists and Rafters
TABL
E R
-7R
AFT
ERS W
ITH
L/2
40 D
EFLE
CTI
ON
LIM
ITA
TIO
N
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
40 p
sf p
lus
Dea
d Lo
ad o
f 15
psf
det
erm
ines
the
req
uire
d be
ndin
g de
sign
val
ue.
Def
lect
ion
- Fo
r 40
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
240
.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n) 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
00
12.0
5-
3 6
- 1
6-
9 7
- 5
8-
0 8
- 7
9-
1 9
- 7
10-
010
- 6
10-1
111
- 4
11-
912
- 1
12-
612
-10
13-
213
- 6
13-1
014
- 2
16.0
4-
6 5
- 3
5-1
0 6
- 5
6-1
1 7
- 5
7-1
0 8
- 3
8-
8 9
- 1
9-
5 9
-10
10-
210
- 6
10-1
011
- 1
11-
511
- 9
12-
012
- 4
12-
712
-10
2x 6
19.2
4-
2 4
- 9
5-
4 5
-10
6-
4 6
- 9
7-
2 7
- 7
7-1
1 8
- 3
8-
8 8
-11
9-
3 9
- 7
9-1
010
- 2
10-
510
- 8
11-
011
- 3
11-
611
- 9
12-
012
- 2
24.0
3-
8 4
- 3
4-
9 5
- 3
5-
8 6
- 1
6-
5 6
- 9
7-
1 7
- 5
7-
9 8
- 0
8-
3 8
- 7
8-1
0 9
- 1
9-
4 9
- 7
9-1
010
- 0
10-
310
- 6
10-
810
-11
11-
1
12.0
6-1
1 8
- 0
8-1
1 9
- 9
10-
711
- 3
12-
012
- 7
13-
313
-10
14-
514
-11
15-
516
- 0
16-
516
-11
17-
517
-10
18-
318
- 9
16.0
6-
0 6
-11
7-
9 8
- 6
9-
2 9
- 9
10-
410
-11
11-
612
- 0
12-
612
-11
13-
513
-10
14-
314
- 8
15-
115
- 5
15-1
016
- 3
16-
716
-11
2x 8
19.2
5-
6 6
- 4
7-
1 7
- 9
8-
4 8
-11
9-
610
- 0
10-
610
-11
11-
511
-10
12-
312
- 7
13-
013
- 5
13-
914
- 1
14-
614
-10
15-
215
- 5
15-
916
- 1
24.0
4-1
1 5
- 8
6-
4 6
-11
7-
6 8
- 0
8-
6 8
-11
9-
4 9
- 9
10-
210
- 7
10-1
111
- 3
11-
812
- 0
12-
412
- 7
12-1
113
- 3
13-
613
-10
14-
114
- 5
14-
8
12.0
8-1
010
- 2
11-
512
- 6
13-
614
- 5
15-
316
- 1
16-1
117
- 8
18-
419
- 1
19-
920
- 4
21-
021
- 7
22-
222
- 9
23-
423
-11
16.0
7-
8 8
-10
9-1
010
-10
11-
812
- 6
13-
313
-11
14-
815
- 3
15-1
116
- 6
17-
117
- 8
18-
218
- 9
19-
319
- 9
20-
220
- 8
21-
221
- 7
2x10
19.2
7-
0 8
- 1
9-
0 9
-10
10-
811
- 5
12-
112
- 9
13-
413
-11
14-
615
- 1
15-
716
- 1
16-
717
- 1
17-
718
- 0
18-
518
-11
19-
419
- 9
20-
220
- 6
24.0
6-
3 7
- 2
8-
1 8
-10
9-
610
- 2
10-1
011
- 5
11-1
112
- 6
13-
013
- 6
13-1
114
- 5
14-1
015
- 3
15-
816
- 1
16-
616
-11
17-
317
- 8
18-
018
- 4
18-
9
12.0
10-
912
- 5
13-1
015
- 2
16-
517
- 6
18-
719
- 7
20-
621
- 5
22-
423
- 2
24-
024
- 9
25-
616
.0 9
- 3
10-
912
- 0
13-
214
- 2
15-
216
- 1
17-
017
- 9
18-
719
- 4
20-
120
- 9
21-
522
- 1
22-
923
- 5
24-
024
- 7
25-
225
- 9
2x12
19.2
8-
6 9
-10
10-1
112
- 0
12-1
113
-10
14-
815
- 6
16-
317
- 0
17-
818
- 4
19-
019
- 7
20-
220
- 9
21-
421
-11
22-
523
- 0
23-
624
- 0
24-
625
- 0
24.0
7-
7 8
- 9
9-1
010
- 9
11-
712
- 5
13-
213
-10
14-
615
- 2
15-
916
- 5
17-
017
- 6
18-
118
- 7
19-
119
- 7
20-
120
- 6
21-
021
- 5
21-1
122
- 4
22-
9
E12
.00.
120.
190.
270.
350.
440.
540.
650.
760.
881.
001.
131.
261.
401.
541.
681.
831.
992.
152.
312.
48E
16.0
0.11
0.17
0.23
0.31
0.39
0.47
0.56
0.66
0.76
0.86
0.98
1.09
1.21
1.33
1.46
1.59
1.72
1.86
2.00
2.15
2.29
2.45
E19
.20.
100.
150.
210.
280.
350.
430.
510.
600.
690.
790.
890.
991.
101.
221.
331.
451.
571.
701.
831.
962.
092.
232.
372.
52E
24.0
0.09
0.14
0.19
0.25
0.31
0.38
0.46
0.54
0.62
0.71
0.80
0.89
0.99
1.09
1.19
1.30
1.41
1.52
1.63
1.75
1.87
2.00
2.12
2.25
2.38
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables for Joists and Rafters
20 Span Tables
TABL
E R
- 8R
AFT
ERS W
ITH
L/2
40 D
EFLE
CTI
ON
LIM
ITS
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
50 p
sf p
lus
dead
loa
dof
15
psf
dete
rmin
es t
he r
equi
red
bend
ing
desi
gn v
alue
.D
efle
ctio
n -
For
50 p
sf l
ive
load
.Li
mite
d to
spa
n in
inc
hes
divi
ded
by 2
40.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n) 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
00
12.0
4-1
0 5
- 7
6-
3 6
-10
7-
4 7
-11
8-
4 8
-10
9-
3 9
- 8
10-
010
- 5
10-
911
- 2
11-
611
-10
12-
212
- 5
12-
913
- 1
13-
416
.0 4
- 2
4-1
0 5
- 5
5-1
1 6
- 5
6-1
0 7
- 3
7-
8 8
- 0
8-
4 8
- 8
9-
0 9
- 4
9-
8 9
-11
10-
310
- 6
10-
911
- 1
11-
411
- 7
11-1
012
- 1
2x 6
19.2
3-1
0 4
- 5
4-1
1 5
- 5
5-1
0 6
- 3
6-
7 7
- 0
7-
4 7
- 8
7-1
1 8
- 3
8-
6 8
-10
9-
1 9
- 4
9-
7 9
-10
10-
110
- 4
10-
710
- 9
11-
011
- 3
11-
524
.0 3
- 5
3-1
1 4
- 5
4-1
0 5
- 3
5-
7 5
-11
6-
3 6
- 6
6-1
0 7
- 1
7-
4 7
- 8
7-1
1 8
- 1
8-
4 8
- 7
8-1
0 9
- 0
9-
3 9
- 5
9-
8 9
-10
10-
010
- 3
12.0
6-
4 7
- 4
8-
3 9
- 0
9-
910
- 5
11-
011
- 7
12-
212
- 9
13-
313
- 9
14-
314
- 8
15-
215
- 7
16-
016
- 5
16-1
017
- 3
17-
716
.0 5
- 6
6-
4 7
- 1
7-
9 8
- 5
9-
0 9
- 6
10-
110
- 7
11-
011
- 6
11-1
112
- 4
12-
913
- 1
13-
613
-10
14-
314
- 7
14-1
115
- 3
15-
715
-11
2x 8
19.2
5-
0 5
-10
6-
6 7
- 1
7-
8 8
- 3
8-
8 9
- 2
9-
810
- 1
10-
610
-10
11-
311
- 7
12-
012
- 4
12-
813
- 0
13-
413
- 7
13-1
114
- 3
14-
614
-10
15-
124
.0 4
- 6
5-
2 5
-10
6-
4 6
-10
7-
4 7
- 9
8-
3 8
- 7
9-
0 9
- 4
9-
910
- 1
10-
510
- 8
11-
011
- 4
11-
711
-11
12-
212
- 5
12-
913
- 0
13-
313
- 6
12.0
8-
1 9
- 4
10-
611
- 6
12-
513
- 3
14-
114
-10
15-
616
- 3
16-1
117
- 6
18-
218
- 9
19-
419
-10
20-
520
-11
21-
622
- 0
22-
616
.0 7
- 0
8-
1 9
- 1
9-1
110
- 9
11-
612
- 2
12-1
013
- 5
14-
114
- 8
15-
215
- 9
16-
316
- 9
17-
317
- 8
18-
218
- 7
19-
019
- 5
19-1
020
- 3
2x10
19.2
6-
5 7
- 5
8-
3 9
- 1
9-1
010
- 6
11-
111
- 9
12-
312
-10
13-
413
-10
14-
414
-10
15-
315
- 9
16-
216
- 7
17-
017
- 4
17-
918
- 2
18-
618
-11
19-
324
.0 5
- 9
6-
7 7
- 5
8-
1 8
- 9
9-
4 9
-11
10-
611
- 0
11-
611
-11
12-
512
-10
13-
313
- 8
14-
114
- 5
14-1
015
- 2
15-
615
-11
16-
316
- 7
16-1
117
- 3
12.0
9-1
011
- 5
12-
913
-11
15-
116
- 1
17-
118
- 0
18-1
119
- 9
20-
621
- 4
22-
122
- 9
23-
624
- 2
24-1
025
- 6
16.0
8-
7 9
-10
11-
012
- 1
13-
113
-11
14-1
015
- 7
16-
417
- 1
17-
918
- 6
19-
119
- 9
20-
420
-11
21-
622
- 1
22-
723
- 2
23-
824
- 2
24-
82x
1219
.2 7
-10
9-
010
- 1
11-
011
-11
12-
913
- 6
14-
314
-11
15-
716
- 3
16-1
017
- 5
18-
018
- 7
19-
119
- 8
20-
220
- 8
21-
121
- 7
22-
122
- 6
23-
023
- 5
24.0
7-
0 8
- 1
9-
0 9
-10
10-
811
- 5
12-
112
- 9
13-
413
-11
14-
615
- 1
15-
716
- 1
16-
717
- 1
17-
718
- 0
18-
618
-11
19-
419
- 9
20-
220
- 6
20-1
1
E12
.00.
120.
190.
260.
340.
430.
530.
630.
740.
850.
971.
101.
221.
361.
501.
641.
781.
942.
092.
252.
412.
58E
16.0
0.11
0.16
0.23
0.30
0.37
0.46
0.55
0.64
0.74
0.84
0.95
1.06
1.18
1.30
1.42
1.55
1.68
1.81
1.95
2.09
2.23
2.38
2.53
E19
.20.
100.
150.
210.
270.
340.
420.
500.
580.
670.
770.
870.
971.
071.
181.
301.
411.
531.
651.
781.
912.
042.
172.
312.
452.
59E
24.0
0.09
0.13
0.18
0.24
0.31
0.37
0.45
0.52
0.60
0.69
0.77
0.87
0.96
1.06
1.16
1.26
1.37
1.48
1.59
1.71
1.82
1.94
2.07
2.19
2.32
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables 21
Span Tables for Joists and Rafters
TABL
E R
-9R
AFT
ERS W
ITH
L/2
40 D
EFLE
CTI
ON
LIM
ITA
TIO
N
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
20 p
sf p
lus
Dea
d Lo
ad o
f 20
psf
det
erm
ines
the
req
uire
d be
ndin
g de
sign
val
ue.
Def
lect
ion
- Fo
r 20
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
240
.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n)30
0 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
00
12.0
6-
2 7
- 1
7-1
1 8
- 8
9-
510
- 0
10-
811
- 3
11-
912
- 4
12-1
013
- 3
13-
914
- 2
14-
815
- 1
15-
615
-11
16-
316
- 8
17-
017
- 5
17-
918
- 1
16.0
5-
4 6
- 2
6-1
0 7
- 6
8-
2 8
- 8
9-
3 9
- 9
10-
210
- 8
11-
111
- 6
11-1
112
- 4
12-
813
- 1
13-
513
- 9
14-
114
- 5
14-
915
- 1
15-
415
- 8
16-
02x
619
.2 4
-10
5-
7 6
- 3
6-1
0 7
- 5
7-1
1 8
- 5
8-1
1 9
- 4
9-
910
- 1
10-
610
-10
11-
311
- 7
11-1
112
- 3
12-
712
-10
13-
213
- 6
13-
914
- 0
14-
414
- 7
24.0
4-
4 5
- 0
5-
7 6
- 2
6-
8 7
- 1
7-
6 7
-11
8-
4 8
- 8
9-
1 9
- 5
9-
910
- 0
10-
410
- 8
10-1
111
- 3
11-
611
- 9
12-
012
- 4
12-
712
-10
13-
1
12.0
8-
1 9
- 4
10-
611
- 6
12-
513
- 3
14-
014
-10
15-
616
- 3
16-1
017
- 6
18-
118
- 9
19-
419
-10
20-
520
-11
21-
521
-11
22-
522
-11
23-
523
-10
16.0
7-
0 8
- 1
9-
1 9
-11
10-
911
- 6
12-
212
-10
13-
514
- 0
14-
715
- 2
15-
816
- 3
16-
917
- 2
17-
818
- 1
18-
719
- 0
19-
519
-10
20-
320
- 8
21-
12x
819
.2 6
- 5
7-
5 8
- 3
9-
1 9
- 9
10-
611
- 1
11-
812
- 3
12-1
013
- 4
13-1
014
- 4
14-1
015
- 3
15-
816
- 2
16-
716
-11
17-
417
- 9
18-
118
- 6
18-1
019
- 3
24.0
5-
9 6
- 7
7-
5 8
- 1
8-
9 9
- 4
9-1
110
- 6
11-
011
- 6
11-1
112
- 5
12-1
013
- 3
13-
814
- 0
14-
514
-10
15-
215
- 6
15-1
016
- 3
16-
716
-10
17-
2
12.0
10-
411
-11
13-
414
- 8
15-1
016
-11
17-1
118
-11
19-1
020
- 8
21-
622
- 4
23-
123
-11
24-
725
- 4
26-
016
.0 8
-11
10-
411
- 7
12-
813
- 8
14-
815
- 6
16-
417
- 2
17-1
118
- 8
19-
420
- 0
20-
821
- 4
21-1
122
- 6
23-
123
- 8
24-
324
-10
25-
425
-10
2x10
19.2
8-
2 9
- 5
10-
711
- 7
12-
613
- 4
14-
214
-11
15-
816
- 4
17-
017
- 8
18-
318
-11
19-
620
- 0
20-
721
- 1
21-
822
- 2
22-
823
- 1
23-
724
- 1
24-
624
.0 7
- 4
8-
5 9
- 5
10-
411
- 2
11-1
112
- 8
13-
414
- 0
14-
815
- 3
15-1
016
- 4
16-1
117
- 5
17-1
118
- 5
18-1
119
- 4
19-1
020
- 3
20-
821
- 1
21-
621
-11
12.0
12-
714
- 6
16-
317
- 9
19-
320
- 6
21-
923
- 0
24-
125
- 2
16.0
10-1
112
- 7
14-
115
- 5
16-
817
- 9
18-1
019
-11
20-1
021
- 9
22-
823
- 6
24-
425
- 2
25-1
12x
1219
.2 9
-11
11-
612
-10
14-
115
- 2
16-
317
- 3
18-
219
- 0
19-1
120
- 8
21-
622
- 3
23-
023
- 8
24-
425
- 0
25-
824
.0 8
-11
10-
311
- 6
12-
713
- 7
14-
615
- 5
16-
317
- 0
17-
918
- 6
19-
319
-11
20-
621
- 2
21-
922
- 5
23-
023
- 6
24-
124
- 8
25-
225
- 8
E12
.00.
100.
150.
220.
280.
360.
440.
520.
610.
710.
800.
911.
011.
131.
241.
361.
481.
601.
731.
862.
002.
142.
282.
422.
57E
16.0
0.09
0.13
0.19
0.25
0.31
0.38
0.45
0.53
0.61
0.70
0.79
0.88
0.97
1.07
1.18
1.28
1.39
1.50
1.61
1.73
1.85
1.97
2.10
2.22
2.35
E19
.20.
080.
120.
170.
230.
280.
350.
410.
480.
560.
640.
720.
800.
890.
981.
071.
171.
271.
371.
471.
581.
691.
801.
912.
032.
15E
24.0
0.07
0.11
0.15
0.20
0.25
0.31
0.37
0.43
0.50
0.57
0.64
0.72
0.80
0.88
0.96
1.05
1.13
1.22
1.32
1.41
1.51
1.61
1.71
1.82
1.92
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables for Joists and Rafters
22 Span Tables
TABL
E R
-10
RA
FTER
S WIT
H L
/240
DEF
LEC
TIO
N L
IMIT
ATI
ON
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
30 p
sf p
lus
Dea
d Lo
ad o
f 20
psf
det
erm
ines
the
req
uire
d be
ndin
g de
sign
val
ue.
Def
lect
ion
- Fo
r 30
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
240
.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n) 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
00
12.0
5-
6 6
- 4
7-
1 7
- 9
8-
5 9
- 0
9-
610
- 0
10-
611
- 0
11-
511
-11
12-
412
- 8
13-
113
- 6
13-1
014
- 2
14-
714
-11
15-
315
- 7
15-1
116
.0 4
- 9
5-
6 6
- 2
6-
9 7
- 3
7-
9 8
- 3
8-
8 9
- 1
9-
6 9
-11
10-
310
- 8
11-
011
- 4
11-
812
- 0
12-
412
- 7
12-1
113
- 2
13-
613
- 9
14-
014
- 3
2x 6
19.2
4-
4 5
- 0
5-
7 6
- 2
6-
8 7
- 1
7-
6 7
-11
8-
4 8
- 8
9-
1 9
- 5
9-
910
- 0
10-
410
- 8
10-1
111
- 3
11-
611
- 9
12-
012
- 4
12-
712
-10
13-
124
.0 3
-11
4-
6 5
- 0
5-
6 5
-11
6-
4 6
- 9
7-
1 7
- 5
7-
9 8
- 1
8-
5 8
- 8
9-
0 9
- 3
9-
6 9
- 9
10-
010
- 3
10-
610
- 9
11-
011
- 3
11-
511
- 8
12.0
7-
3 8
- 4
9-
410
- 3
11-
111
-10
12-
713
- 3
13-1
114
- 6
15-
115
- 8
16-
316
- 9
17-
317
- 9
18-
318
- 9
19-
219
- 8
20-
120
- 6
20-1
116
.0 6
- 3
7-
3 8
- 1
8-1
1 9
- 7
10-
310
-10
11-
612
- 0
12-
713
- 1
13-
714
- 0
14-
614
-11
15-
515
-10
16-
316
- 7
17-
017
- 5
17-
918
- 1
18-
618
-10
2x 8
19.2
5-
9 6
- 7
7-
5 8
- 1
8-
9 9
- 4
9-1
110
- 6
11-
011
- 6
11-1
112
- 5
12-1
013
- 3
13-
814
- 0
14-
514
-10
15-
215
- 6
15-1
016
- 3
16-
716
-10
17-
224
.0 5
- 2
5-1
1 6
- 7
7-
3 7
-10
8-
4 8
-11
9-
4 9
-10
10-
310
- 8
11-
111
- 6
11-1
012
- 2
12-
712
-11
13-
313
- 7
13-1
114
- 2
14-
614
-10
15-
115
- 5
12.0
9-
310
- 8
11-1
113
- 1
14-
215
- 1
16-
016
-11
17-
918
- 6
19-
320
- 0
20-
821
- 4
22-
022
- 8
23-
323
-11
24-
625
- 1
25-
716
.0 8
- 0
9-
310
- 4
11-
412
- 3
13-
113
-10
14-
815
- 4
16-
016
- 8
17-
417
-11
18-
619
- 1
19-
720
- 2
20-
821
- 2
21-
822
- 2
22-
823
- 1
23-
724
- 0
2x10
19.2
7-
4 8
- 5
9-
510
- 4
11-
211
-11
12-
813
- 4
14-
014
- 8
15-
315
-10
16-
416
-11
17-
517
-11
18-
518
-11
19-
419
-10
20-
320
- 8
21-
121
- 6
21-1
124
.0 6
- 6
7-
7 8
- 5
9-
310
- 0
10-
811
- 4
11-1
112
- 6
13-
113
- 7
14-
214
- 8
15-
115
- 7
16-
016
- 6
16-1
117
- 4
17-
918
- 1
18-
618
-11
19-
319
- 7
12.0
11-
313
- 0
14-
615
-11
17-
218
- 4
19-
620
- 6
21-
722
- 6
23-
524
- 4
25-
226
- 0
16.0
9-
911
- 3
12-
713
- 9
14-1
115
-11
16-1
017
- 9
18-
819
- 6
20-
321
- 1
21-
922
- 6
23-
223
-10
24-
625
- 2
25-
92x
1219
.2 8
-11
10-
311
- 6
12-
713
- 7
14-
615
- 5
16-
317
- 0
17-
918
- 6
19-
319
-11
20-
621
- 2
21-
922
- 5
23-
023
- 6
24-
124
- 8
25-
225
- 8
24.0
7-1
1 9
- 2
10-
311
- 3
12-
213
- 0
13-
914
- 6
15-
315
-11
16-
717
- 2
17-
918
- 4
18-1
119
- 6
20-
020
- 6
21-
121
- 7
22-
022
- 6
23-
023
- 5
23-1
0
E12
.00.
110.
170.
230.
310.
380.
470.
560.
660.
760.
860.
971.
091.
211.
331.
461.
591.
721.
862.
002.
142.
292.
442.
60E
16.0
0.09
0.14
0.20
0.26
0.33
0.41
0.49
0.57
0.66
0.75
0.84
0.94
1.05
1.15
1.26
1.37
1.49
1.61
1.73
1.86
1.99
2.12
2.25
2.39
2.53
E19
.20.
090.
130.
180.
240.
300.
370.
440.
520.
600.
680.
770.
860.
951.
051.
151.
251.
361.
471.
581.
701.
811.
932.
052.
182.
31E
24.0
0.08
0.12
0.16
0.22
0.27
0.33
0.40
0.46
0.54
0.61
0.69
0.77
0.85
0.94
1.03
1.12
1.22
1.31
1.41
1.52
1.62
1.73
1.84
1.95
2.06
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables 23
Span Tables for Joists and Rafters
TABL
E R
-11
RA
FTER
S WIT
H L
/240
DEF
LEC
TIO
N L
IMIT
ATI
ON
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
40 p
sf p
lus
Dea
d Lo
ad o
f 20
psf
det
erm
ines
the
req
uire
d be
ndin
g de
sign
val
ue.
Def
lect
ion
- Fo
r 40
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
240
.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n) 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
00
12.0
5-
0 5
-10
6-
6 7
- 1
7-
8 8
- 2
8-
8 9
- 2
9-
710
- 0
10-
510
-10
11-
311
- 7
11-1
112
- 4
12-
813
- 0
13-
313
- 7
13-1
114
- 2
16.0
4-
4 5
- 0
5-
7 6
- 2
6-
8 7
- 1
7-
6 7
-11
8-
4 8
- 8
9-
1 9
- 5
9-
910
- 0
10-
410
- 8
10-1
111
- 3
11-
611
- 9
12-
012
- 4
12-
712
-10
13-
12x
619
.2 4
- 0
4-
7 5
- 1
5-
7 6
- 1
6-
6 6
-10
7-
3 7
- 7
7-1
1 8
- 3
8-
7 8
-11
9-
2 9
- 5
9-
910
- 0
10-
310
- 6
10-
911
- 0
11-
311
- 5
11-
811
-11
24.0
3-
7 4
- 1
4-
7 5
- 0
5-
5 5
-10
6-
2 6
- 6
6-1
0 7
- 1
7-
5 7
- 8
7-1
1 8
- 2
8-
5 8
- 8
8-1
1 9
- 2
9-
5 9
- 7
9-1
010
- 0
10-
310
- 5
10-
8
12.0
6-
7 7
- 8
8-
7 9
- 4
10-
110
-10
11-
612
- 1
12-
813
- 3
13-
914
- 4
14-1
015
- 3
15-
916
- 3
16-
817
- 1
17-
617
-11
18-
418
- 9
16.0
5-
9 6
- 7
7-
5 8
- 1
8-
9 9
- 4
9-1
110
- 6
11-
011
- 6
11-1
112
- 5
12-1
013
- 3
13-
814
- 0
14-
514
-10
15-
215
- 6
15-1
016
- 3
16-
716
-10
17-
22x
819
.2 5
- 3
6-
0 6
- 9
7-
5 8
- 0
8-
7 9
- 1
9-
710
- 0
10-
610
-11
11-
411
- 8
12-
112
- 5
12-1
013
- 2
13-
613
-10
14-
214
- 6
14-1
015
- 1
15-
515
- 8
24.0
4-
8 5
- 5
6-
0 6
- 7
7-
2 7
- 8
8-
1 8
- 7
9-
0 9
- 4
9-
910
- 1
10-
610
-10
11-
211
- 6
11-
912
- 1
12-
512
- 8
12-1
113
- 3
13-
613
- 9
14-
0
12.0
8-
5 9
- 9
10-1
111
-11
12-1
113
- 9
14-
815
- 5
16-
216
-11
17-
718
- 3
18-1
119
- 6
20-
120
- 8
21-
321
-10
22-
422
-10
23-
523
-11
16.0
7-
4 8
- 5
9-
510
- 4
11-
211
-11
12-
813
- 4
14-
014
- 8
15-
315
-10
16-
416
-11
17-
517
-11
18-
518
-11
19-
419
-10
20-
320
- 8
21-
121
- 6
21-1
12x
1019
.2 6
- 8
7-
8 8
- 7
9-
510
- 2
10-1
111
- 7
12-
212
- 9
13-
413
-11
14-
514
-11
15-
515
-11
16-
416
-10
17-
317
- 8
18-
118
- 6
18-1
119
- 3
19-
820
- 0
24.0
6-
0 6
-11
7-
8 8
- 5
9-
1 9
- 9
10-
410
-11
11-
511
-11
12-
512
-11
13-
413
- 9
14-
314
- 8
15-
015
- 5
15-1
016
- 2
16-
616
-11
17-
317
- 7
17-1
1
12.0
10-
311
-10
13-
314
- 6
15-
816
- 9
17-
918
- 9
19-
820
- 6
21-
522
- 2
23-
023
- 9
24-
525
- 2
25-1
016
.0 8
-11
10-
311
- 6
12-
713
- 7
14-
615
- 5
16-
317
- 0
17-
918
- 6
19-
319
-11
20-
621
- 2
21-
922
- 5
23-
023
- 6
24-
124
- 8
25-
225
- 8
2x12
19.2
8-
1 9
- 4
10-
611
- 6
12-
513
- 3
14-
114
-10
15-
716
- 3
16-1
117
- 6
18-
218
- 9
19-
419
-11
20-
521
- 0
21-
622
- 0
22-
623
- 0
23-
523
-11
24-
424
.0 7
- 3
8-
5 9
- 4
10-
311
- 1
11-1
012
- 7
13-
313
-11
14-
615
- 1
15-
816
- 3
16-
917
- 3
17-
918
- 3
18-
919
- 3
19-
820
- 1
20-
621
- 0
21-
521
- 9
E12
.00.
110.
170.
240.
310.
390.
480.
570.
670.
770.
880.
991.
101.
221.
351.
481.
611.
751.
892.
032.
182.
332.
48E
16.0
0.09
0.15
0.20
0.27
0.34
0.41
0.49
0.58
0.67
0.76
0.86
0.96
1.06
1.17
1.28
1.39
1.51
1.63
1.76
1.88
2.01
2.15
2.28
2.42
2.56
E19
.20.
090.
130.
190.
240.
310.
380.
450.
530.
610.
690.
780.
870.
971.
071.
171.
271.
381.
491.
601.
721.
841.
962.
082.
212.
34E
24.0
0.08
0.12
0.17
0.22
0.28
0.34
0.40
0.47
0.54
0.62
0.70
0.78
0.87
0.95
1.04
1.14
1.23
1.33
1.43
1.54
1.64
1.75
1.86
1.98
2.09
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables for Joists and Rafters
24 Span Tables
TABL
E R
-12
RA
FTER
S WIT
H L
/240
DEF
LEC
TIO
N L
IMIT
S
DES
IGN
CR
ITER
IA:
Stre
ngth
- L
ive
Load
of
50 p
sf p
lus
dead
loa
dof
20
psf
dete
rmin
es t
he r
equi
red
bend
ing
desi
gn v
alue
.D
efle
ctio
n -
For
50 p
sf l
ive
load
.Li
mite
d to
spa
n in
inc
hes
divi
ded
by 2
40.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n) 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
00
12.0
4-
8 5
- 4
6-
0 6
- 7
7-
1 7
- 7
8-
1 8
- 6
8-1
1 9
- 4
9-
810
- 0
10-
510
- 9
11-
111
- 5
11-
812
- 0
12-
412
- 7
12-1
013
- 2
16.0
4-
0 4
- 8
5-
2 5
- 8
6-
2 6
- 7
7-
0 7
- 4
7-
8 8
- 1
8-
5 8
- 8
9-
0 9
- 4
9-
7 9
-10
10-
210
- 5
10-
810
-11
11-
211
- 5
11-
711
-10
12-
12x
619
.2 3
- 8
4-
3 4
- 9
5-
2 5
- 7
6-
0 6
- 4
6-
9 7
- 0
7-
4 7
- 8
7-1
1 8
- 3
8-
6 8
- 9
9-
0 9
- 3
9-
6 9
- 9
9-1
110
- 2
10-
510
- 7
10-1
011
- 0
24.0
3-
3 3
-10
4-
3 4
- 8
5-
0 5
- 4
5-
8 6
- 0
6-
4 6
- 7
6-1
0 7
- 1
7-
4 7
- 7
7-1
0 8
- 1
8-
3 8
- 6
8-
8 8
-11
9-
1 9
- 4
9-
6 9
- 8
9-1
0
12.0
6-
2 7
- 1
7-1
1 8
- 8
9-
410
- 0
10-
711
- 2
11-
912
- 3
12-
913
- 3
13-
814
- 2
14-
715
- 0
15-
515
-10
16-
316
- 7
17-
017
- 4
16.0
5-
4 6
- 2
6-1
0 7
- 6
8-
1 8
- 8
9-
2 9
- 8
10-
210
- 7
11-
111
- 6
11-1
012
- 3
12-
813
- 0
13-
413
- 8
14-
014
- 4
14-
815
- 0
15-
415
- 7
15-1
12x
819
.2 4
-10
5-
7 6
- 3
6-1
0 7
- 5
7-1
1 8
- 5
8-1
0 9
- 3
9-
810
- 1
10-
610
-10
11-
211
- 6
11-1
012
- 2
12-
612
-10
13-
113
- 5
13-
814
- 0
14-
314
- 6
24.0
4-
4 5
- 0
5-
7 6
- 2
6-
7 7
- 1
7-
6 7
-11
8-
4 8
- 8
9-
0 9
- 4
9-
810
- 0
10-
410
- 7
10-1
111
- 2
11-
611
- 9
12-
012
- 3
12-
612
- 9
13-
0
12.0
7-1
0 9
- 0
10-
111
- 1
11-1
112
- 9
13-
614
- 3
15-
015
- 8
16-
316
-11
17-
618
- 1
18-
719
- 2
19-
820
- 2
20-
821
- 2
21-
822
- 1
16.0
6-
9 7
-10
8-
9 9
- 7
10-
411
- 1
11-
912
- 4
13-
013
- 6
14-
114
- 8
15-
215
- 8
16-
116
- 7
17-
017
- 6
17-1
118
- 4
18-
919
- 2
19-
719
-11
20-
42x
1019
.2 6
- 2
7-
2 8
- 0
8-
9 9
- 5
10-
110
- 8
11-
311
-10
12-
412
-10
13-
413
-10
14-
314
- 9
15-
215
- 7
15-1
116
- 4
16-
917
- 1
17-
617
-10
18-
218
- 6
24.0
5-
6 6
- 5
7-
2 7
-10
8-
5 9
- 0
9-
710
- 1
10-
711
- 1
11-
611
-11
12-
412
- 9
13-
213
- 6
13-1
114
- 3
14-
815
- 0
15-
415
- 8
15-1
116
- 3
16-
7
12.0
9-
611
- 0
12-
313
- 5
14-
615
- 6
16-
617
- 4
18-
219
- 0
19-1
020
- 6
21-
321
-11
22-
823
- 3
23-1
124
- 7
25-
225
- 9
16.0
8-
3 9
- 6
10-
811
- 8
12-
713
- 5
14-
315
- 0
15-
916
- 6
17-
217
- 9
18-
519
- 0
19-
720
- 2
20-
921
- 3
21-
922
- 4
22-1
023
- 3
23-
924
- 3
24-
82x
1219
.2 7
- 6
8-
8 9
- 8
10-
811
- 6
12-
313
- 0
13-
914
- 5
15-
015
- 8
16-
316
-10
17-
417
-11
18-
518
-11
19-
519
-11
20-
420
-10
21-
321
- 8
22-
222
- 7
24.0
6-
9 7
- 9
8-
8 9
- 6
10-
311
- 0
11-
812
- 3
12-1
013
- 5
14-
014
- 6
15-
015
- 6
16-
016
- 6
16-1
117
- 4
17-
918
- 2
18-
719
- 0
19-
519
-10
20-
2
E12
.00.
110.
170.
230.
310.
390.
470.
560.
660.
760.
870.
981.
101.
211.
341.
471.
601.
731.
872.
012.
162.
312.
46E
16.0
0.09
0.14
0.20
0.27
0.34
0.41
0.49
0.57
0.66
0.75
0.85
0.95
1.05
1.16
1.27
1.38
1.50
1.62
1.74
1.87
2.00
2.13
2.26
2.40
2.54
E19
.20.
090.
130.
180.
240.
310.
370.
450.
520.
600.
690.
770.
870.
961.
061.
161.
261.
371.
481.
591.
711.
821.
942.
072.
192.
32E
24.0
0.08
0.12
0.17
0.22
0.27
0.33
0.40
0.47
0.54
0.61
0.69
0.77
0.86
0.95
1.04
1.13
1.22
1.32
1.42
1.53
1.63
1.74
1.85
1.96
2.07
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables 25
Span Tables for Joists and Rafters
TABL
E R
-13
RA
FTER
S WIT
H L
/180
DEF
LEC
TIO
N L
IMIT
ATI
ON
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
20 p
sf p
lus
Dea
d Lo
ad o
f 10
psf
det
erm
ines
the
req
uire
d be
ndin
g de
sign
val
ue.
Def
lect
ion
- Fo
r 20
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
180
.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n) 2
00 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
0028
0029
0030
00
12.0
3-
8 4
- 6
5-
3 5
-10
6-
5 6
-11
7-
5 7
-10
8-
3 8
- 8
9-
0 9
- 5
9-
910
- 1
10-
510
- 9
11-
111
- 4
11-
811
-11
12-
312
- 6
16.0
3-
2 3
-11
4-
6 5
- 1
5-
6 6
- 0
6-
5 6
- 9
7-
2 7
- 6
7-1
0 8
- 2
8-
5 8
- 9
9-
0 9
- 4
9-
7 9
-10
10-
110
- 4
10-
710
-10
11-
111
- 4
11-
62x
419
.2 2
-11
3-
7 4
- 1
4-
7 5
- 1
5-
5 5
-10
6-
2 6
- 6
6-1
0 7
- 2
7-
5 7
- 9
8-
0 8
- 3
8-
6 8
- 9
9-
0 9
- 3
9-
5 9
- 8
9-1
110
- 1
10-
410
- 6
10-
924
.0 2
- 7
3-
2 3
- 8
4-
1 4
- 6
4-1
1 5
- 3
5-
6 5
-10
6-
1 6
- 5
6-
8 6
-11
7-
2 7
- 5
7-
7 7
-10
8-
0 8
- 3
8-
5 8
- 8
8-1
0 9
- 0
9-
3 9
- 5
9-
7 9
- 9
9-1
110
- 1
12.0
5-1
0 7
- 1
8-
2 9
- 2
10-
010
-10
11-
712
- 4
13-
013
- 7
14-
214
- 9
15-
415
-11
16-
516
-11
17-
517
-10
18-
418
- 9
19-
319
- 8
16.0
5-
0 6
- 2
7-
1 7
-11
8-
8 9
- 5
10-
010
- 8
11-
311
- 9
12-
412
-10
13-
313
- 9
14-
214
- 8
15-
115
- 6
15-1
116
- 3
16-
817
- 0
17-
517
- 9
18-
12x
619
.2 4
- 7
5-
7 6
- 6
7-
3 7
-11
8-
7 9
- 2
9-
910
- 3
10-
911
- 3
11-
812
- 2
12-
713
- 0
13-
413
- 9
14-
214
- 6
14-1
015
- 2
15-
715
-11
16-
216
- 6
16-1
024
.0 4
- 1
5-
0 5
-10
6-
6 7
- 1
7-
8 8
- 2
8-
8 9
- 2
9-
710
- 0
10-
510
-10
11-
311
- 7
11-1
112
- 4
12-
813
- 0
13-
313
- 7
13-1
114
- 2
14-
614
- 9
15-
115
- 4
15-
715
-11
12.0
7-
8 9
- 4
10-1
012
- 1
13-
314
- 4
15-
316
- 3
17-
117
-11
18-
919
- 6
20-
320
-11
21-
722
- 3
22-1
123
- 7
24-
224
- 9
25-
425
-11
16.0
6-
7 8
- 1
9-
410
- 6
11-
612
- 5
13-
314
- 0
14-1
015
- 6
16-
316
-10
17-
618
- 1
18-
919
- 4
19-1
020
- 5
20-1
121
- 5
21-1
122
- 5
22-1
123
- 5
23-1
02x
819
.2 6
- 0
7-
5 8
- 7
9-
710
- 6
11-
412
- 1
12-1
013
- 6
14-
214
-10
15-
516
- 0
16-
717
- 1
17-
718
- 1
18-
719
- 1
19-
720
- 0
20-
620
-11
21-
421
- 9
22-
224
.0 5
- 5
6-
7 7
- 8
8-
7 9
- 4
10-
110
-10
11-
612
- 1
12-
813
- 3
13-
914
- 4
14-1
015
- 3
15-
916
- 3
16-
817
- 1
17-
617
-11
18-
418
- 9
19-
119
- 6
19-1
020
- 3
20-
720
-11
12.0
9-
911
-11
13-
915
- 5
16-1
118
- 3
19-
620
- 8
21-1
022
-10
23-1
124
-10
25-1
016
.0 8
- 5
10-
411
-11
13-
414
- 8
15-1
016
-11
17-1
118
-11
19-1
020
- 8
21-
622
- 4
23-
123
-11
24-
725
- 4
26-
02x
1019
.2 7
- 8
9-
510
-11
12-
213
- 4
14-
515
- 5
16-
417
- 3
18-
118
-11
19-
820
- 5
21-
121
-10
22-
623
- 1
23-
924
- 5
25-
025
- 7
24.0
6-1
1 8
- 5
9-
910
-11
11-1
112
-11
13-
914
- 8
15-
516
- 2
16-1
117
- 7
18-
318
-11
19-
620
- 1
20-
821
- 3
21-1
022
- 4
22-1
023
- 5
23-1
124
- 5
24-1
025
- 4
25-1
0
E12
.00.
060.
120.
180.
250.
330.
410.
510.
600.
710.
820.
931.
051.
171.
301.
431.
571.
711.
852.
002.
152.
312.
47E
16.0
0.05
0.10
0.15
0.22
0.28
0.36
0.44
0.52
0.61
0.71
0.80
0.91
1.01
1.13
1.24
1.36
1.48
1.60
1.73
1.86
2.00
2.14
2.28
2.42
2.57
E19
.20.
050.
090.
140.
200.
260.
330.
400.
480.
560.
640.
730.
830.
931.
031.
131.
241.
351.
461.
581.
701.
821.
952.
082.
212.
342.
48E
24.0
0.04
0.08
0.13
0.18
0.23
0.29
0.36
0.43
0.50
0.58
0.66
0.74
0.83
0.92
1.01
1.11
1.21
1.31
1.41
1.52
1.63
1.74
1.86
1.98
2.10
2.22
2.34
2.47
2.60
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables for Joists and Rafters
26 Span Tables
TABL
E R
-14
RA
FTER
S WIT
H L
/180
DEF
LEC
TIO
N L
IMIT
ATI
ON
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
30 p
sf p
lus
Dea
d Lo
ad o
f 10
psf
det
erm
ines
the
req
uire
d be
ndin
g de
sign
val
ue.
Def
lect
ion
- Fo
r 30
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
180
.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n)20
0 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
0028
0029
0030
00
12.0
3-
2 3
-11
4-
6 5
- 1
5-
6 6
- 0
6-
5 6
- 9
7-
2 7
- 6
7-1
0 8
- 2
8-
5 8
- 9
9-
0 9
- 4
9-
7 9
-10
10-
110
- 4
10-
710
-10
11-
116
.0 2
- 9
3-
5 3
-11
4-
4 4
-10
5-
2 5
- 6
5-1
0 6
- 2
6-
6 6
- 9
7-
1 7
- 4
7-
7 7
-10
8-
1 8
- 4
8-
6 8
- 9
9-
0 9
- 2
9-
5 9
- 7
9-
910
- 0
2x 4
19.2
2-
6 3
- 1
3-
7 4
- 0
4-
4 4
- 9
5-
1 5
- 4
5-
8 5
-11
6-
2 6
- 5
6-
8 6
-11
7-
2 7
- 4
7-
7 7
- 9
8-
0 8
- 2
8-
5 8
- 7
8-
9 8
-11
9-
1 9
- 3
9-
524
.0 2
- 3
2-
9 3
- 2
3-
7 3
-11
4-
3 4
- 6
4-1
0 5
- 1
5-
4 5
- 6
5-
9 6
- 0
6-
2 6
- 5
6-
7 6
- 9
7-
0 7
- 2
7-
4 7
- 6
7-
8 7
-10
8-
0 8
- 2
8-
4 8
- 5
8-
7 8
- 9
12.0
5-
0 6
- 2
7-
1 7
-11
8-
8 9
- 5
10-
010
- 8
11-
311
- 9
12-
412
-10
13-
313
- 9
14-
214
- 8
15-
115
- 6
15-1
116
- 3
16-
817
- 0
17-
516
.0 4
- 4
5-
4 6
- 2
6-1
0 7
- 6
8-
2 8
- 8
9-
3 9
- 9
10-
210
- 8
11-
111
- 6
11-1
112
- 4
12-
813
- 1
13-
513
- 9
14-
114
- 5
14-
915
- 1
15-
415
- 8
2x 6
19.2
4-
0 4
-10
5-
7 6
- 3
6-1
0 7
- 5
7-1
1 8
- 5
8-1
1 9
- 4
9-
910
- 1
10-
610
-10
11-
311
- 7
11-1
112
- 3
12-
712
-10
13-
213
- 6
13-
914
- 0
14-
414
- 7
14-1
024
.0 3
- 7
4-
4 5
- 0
5-
7 6
- 2
6-
8 7
- 1
7-
6 7
-11
8-
4 8
- 8
9-
1 9
- 5
9-
910
- 0
10-
410
- 8
10-1
111
- 3
11-
611
- 9
12-
012
- 4
12-
712
-10
13-
113
- 3
13-
613
- 9
12.0
6-
7 8
- 1
9-
410
- 6
11-
612
- 5
13-
314
- 0
14-1
015
- 6
16-
316
-10
17-
618
- 1
18-
919
- 4
19-1
020
- 5
20-1
121
- 5
21-1
122
- 5
22-1
116
.0 5
- 9
7-
0 8
- 1
9-
1 9
-11
10-
911
- 6
12-
212
-10
13-
514
- 0
14-
715
- 2
15-
816
- 3
16-
917
- 2
17-
818
- 1
18-
719
- 0
19-
519
-10
20-
320
- 8
2x 8
19.2
5-
3 6
- 5
7-
5 8
- 3
9-
1 9
- 9
10-
611
- 1
11-
812
- 3
12-1
013
- 4
13-1
014
- 4
14-1
015
- 3
15-
816
- 2
16-
716
-11
17-
417
- 9
18-
118
- 6
18-1
019
- 3
19-
724
.0 4
- 8
5-
9 6
- 7
7-
5 8
- 1
8-
9 9
- 4
9-1
110
- 6
11-
011
- 6
11-1
112
- 5
12-1
013
- 3
13-
814
- 0
14-
514
-10
15-
215
- 6
15-1
016
- 3
16-
716
-10
17-
217
- 6
17-1
018
- 1
12.0
8-
510
- 4
11-1
113
- 4
14-
815
-10
16-1
117
-11
18-1
119
-10
20-
821
- 6
22-
423
- 1
23-1
124
- 7
25-
426
- 0
16.0
7-
4 8
-11
10-
411
- 7
12-
813
- 8
14-
815
- 6
16-
417
- 2
17-1
118
- 8
19-
420
- 0
20-
821
- 4
21-1
122
- 6
23-
123
- 8
24-
324
-10
25-
425
-10
2x10
19.2
6-
8 8
- 2
9-
510
- 7
11-
712
- 6
13-
414
- 2
14-1
115
- 8
16-
417
- 0
17-
818
- 3
18-1
119
- 6
20-
020
- 7
21-
121
- 8
22-
222
- 8
23-
123
- 7
24-
124
- 6
25-
024
.0 6
- 0
7-
4 8
- 5
9-
510
- 4
11-
211
-11
12-
813
- 4
14-
014
- 8
15-
315
-10
16-
416
-11
17-
517
-11
18-
518
-11
19-
419
-10
20-
320
- 8
21-
121
- 6
21-1
122
- 4
22-
923
- 1
E12
.00.
060.
110.
170.
240.
320.
400.
490.
590.
690.
790.
911.
021.
141.
271.
391.
531.
661.
801.
952.
102.
252.
402.
56E
16.0
0.05
0.10
0.15
0.21
0.28
0.35
0.43
0.51
0.60
0.69
0.78
0.88
0.99
1.10
1.21
1.32
1.44
1.56
1.69
1.82
1.95
2.08
2.22
2.36
2.50
E19
.20.
050.
090.
140.
190.
250.
320.
390.
470.
540.
630.
720.
810.
901.
001.
101.
211.
321.
431.
541.
661.
781.
902.
032.
152.
282.
422.
55E
24.0
0.04
0.08
0.12
0.17
0.23
0.29
0.35
0.42
0.49
0.56
0.64
0.72
0.81
0.89
0.99
1.08
1.18
1.28
1.38
1.48
1.59
1.70
1.81
1.93
2.04
2.16
2.28
2.41
2.53
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables 27
Span Tables for Joists and Rafters
TABL
E R
-15
RA
FTER
S WIT
H L
/180
DEF
LEC
TIO
N L
IMIT
ATI
ON
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
40 p
sf p
lus
Dea
d Lo
ad o
f 10
psf
det
erm
ines
the
req
uire
d be
ndin
g de
sign
val
ue.
Def
lect
ion
- Fo
r 40
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
180
.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n)20
0 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
0028
0029
0030
00
12.0
2-1
0 3
- 6
4-
0 4
- 6
4-1
1 5
- 4
5-
9 6
- 1
6-
5 6
- 8
7-
0 7
- 3
7-
7 7
-10
8-
1 8
- 4
8-
7 8
-10
9-
0 9
- 3
9-
6 9
- 8
9-1
110
- 1
16.0
2-
6 3
- 0
3-
6 3
-11
4-
3 4
- 8
4-1
1 5
- 3
5-
6 5
-10
6-
1 6
- 4
6-
7 6
- 9
7-
0 7
- 3
7-
5 7
- 8
7-1
0 8
- 0
8-
2 8
- 5
8-
7 8
- 9
8-1
1 9
- 1
2x 4
19.2
2-
3 2
- 9
3-
2 3
- 7
3-1
1 4
- 3
4-
6 4
-10
5-
1 5
- 4
5-
6 5
- 9
6-
0 6
- 2
6-
5 6
- 7
6-
9 7
- 0
7-
2 7
- 4
7-
6 7
- 8
7-1
0 8
- 0
8-
2 8
- 4
8-
5 8
- 7
24.0
2-
0 2
- 6
2-1
0 3
- 2
3-
6 3
- 9
4-
0 4
- 3
4-
6 4
- 9
4-1
1 5
- 2
5-
4 5
- 6
5-
9 5
-11
6-
1 6
- 3
6-
5 6
- 7
6-
8 6
-10
7-
0 7
- 2
7-
3 7
- 5
7-
7 7
- 8
7-1
0
12.0
4-
6 5
- 6
6-
4 7
- 1
7-
9 8
- 5
9-
0 9
- 6
10-
010
- 6
11-
011
- 5
11-1
112
- 4
12-
813
- 1
13-
613
-10
14-
214
- 7
14-1
115
- 3
15-
715
-11
16.0
3-1
1 4
- 9
5-
6 6
- 2
6-
9 7
- 3
7-
9 8
- 3
8-
8 9
- 1
9-
6 9
-11
10-
310
- 8
11-
011
- 4
11-
812
- 0
12-
412
- 7
12-1
113
- 2
13-
613
- 9
14-
014
- 3
2x 6
19.2
3-
7 4
- 4
5-
0 5
- 7
6-
2 6
- 8
7-
1 7
- 6
7-1
1 8
- 4
8-
8 9
- 1
9-
5 9
- 9
10-
010
- 4
10-
810
-11
11-
311
- 6
11-
912
- 0
12-
412
- 7
12-1
013
- 1
13-
313
- 6
24.0
3-
2 3
-11
4-
6 5
- 0
5-
6 5
-11
6-
4 6
- 9
7-
1 7
- 5
7-
9 8
- 1
8-
5 8
- 8
9-
0 9
- 3
9-
6 9
- 9
10-
010
- 3
10-
610
- 9
11-
011
- 3
11-
511
- 8
11-1
112
- 1
12-
4
12.0
5-1
1 7
- 3
8-
4 9
- 4
10-
311
- 1
11-1
012
- 7
13-
313
-11
14-
615
- 1
15-
816
- 3
16-
917
- 3
17-
918
- 3
18-
919
- 2
19-
820
- 1
20-
620
-11
16.0
5-
2 6
- 3
7-
3 8
- 1
8-1
1 9
- 7
10-
310
-10
11-
612
- 0
12-
713
- 1
13-
714
- 0
14-
614
-11
15-
515
-10
16-
316
- 7
17-
017
- 5
17-
918
- 1
18-
618
-10
2x 8
19.2
4-
8 5
- 9
6-
7 7
- 5
8-
1 8
- 9
9-
4 9
-11
10-
611
- 0
11-
611
-11
12-
512
-10
13-
313
- 8
14-
014
- 5
14-1
015
- 2
15-
615
-10
16-
316
- 7
16-1
017
- 2
17-
617
-10
24.0
4-
2 5
- 2
5-1
1 6
- 7
7-
3 7
-10
8-
4 8
-11
9-
4 9
-10
10-
310
- 8
11-
111
- 6
11-1
012
- 2
12-
712
-11
13-
313
- 7
13-1
114
- 2
14-
614
-10
15-
115
- 5
15-
815
-11
16-
3
12.0
7-
7 9
- 3
10-
811
-11
13-
114
- 2
15-
116
- 0
16-1
117
- 9
18-
619
- 3
20-
020
- 8
21-
422
- 0
22-
823
- 3
23-1
124
- 6
25-
125
- 7
16.0
6-
6 8
- 0
9-
310
- 4
11-
412
- 3
13-
113
-10
14-
815
- 4
16-
016
- 8
17-
417
-11
18-
619
- 1
19-
720
- 2
20-
821
- 2
21-
822
- 2
22-
823
- 1
23-
724
- 0
2x10
19.2
6-
0 7
- 4
8-
5 9
- 5
10-
411
- 2
11-1
112
- 8
13-
414
- 0
14-
815
- 3
15-1
016
- 4
16-1
117
- 5
17-1
118
- 5
18-1
119
- 4
19-1
020
- 3
20-
821
- 1
21-
621
-11
22-
422
- 9
24.0
5-
4 6
- 6
7-
7 8
- 5
9-
310
- 0
10-
811
- 4
11-1
112
- 6
13-
113
- 7
14-
214
- 8
15-
115
- 7
16-
016
- 6
16-1
117
- 4
17-
918
- 1
18-
618
-11
19-
319
- 7
20-
020
- 4
20-
8
E12
.00.
060.
110.
170.
230.
310.
380.
470.
560.
660.
760.
860.
971.
091.
211.
331.
461.
591.
721.
862.
002.
142.
292.
442.
60E
16.0
0.05
0.09
0.14
0.20
0.26
0.33
0.41
0.49
0.57
0.66
0.75
0.84
0.94
1.05
1.15
1.26
1.37
1.49
1.61
1.73
1.86
1.99
2.12
2.25
2.39
2.53
E19
.20.
050.
090.
130.
180.
240.
300.
370.
440.
520.
600.
680.
770.
860.
951.
051.
151.
251.
361.
471.
581.
701.
811.
932.
052.
182.
312.
432.
57E
24.0
0.04
0.08
0.12
0.16
0.22
0.27
0.33
0.40
0.46
0.54
0.61
0.69
0.77
0.85
0.94
1.03
1.12
1.22
1.31
1.41
1.52
1.62
1.73
1.84
1.95
2.06
2.18
2.30
2.41
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables for Joists and Rafters
28 Span Tables
TABL
E R
-16
RA
FTER
S WIT
H L
/180
DEF
LEC
TIO
N L
IMIT
S
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
50 p
sf p
lus
dead
loa
dof
10
psf
dete
rmin
es t
he r
equi
red
bend
ing
desi
gn v
alue
.D
efle
ctio
n -
For
50 p
sf l
ive
load
.Li
mite
d to
spa
n in
inc
hes
divi
ded
by 1
80.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n) 2
00 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
0028
0029
0030
00
12.0
2-
7 3
- 2
3-
8 4
- 1
4-
6 4
-11
5-
3 5
- 6
5-1
0 6
- 1
6-
5 6
- 8
6-1
1 7
- 2
7-
5 7
- 7
7-1
0 8
- 0
8-
3 8
- 5
8-
8 8
-10
9-
0 9
- 3
16.0
2-
3 2
- 9
3-
2 3
- 7
3-1
1 4
- 3
4-
6 4
-10
5-
1 5
- 4
5-
6 5
- 9
6-
0 6
- 2
6-
5 6
- 7
6-
9 7
- 0
7-
2 7
- 4
7-
6 7
- 8
7-1
0 8
- 0
8-
2 8
- 4
8-
52x
419
.2 2
- 1
2-
6 2
-11
3-
3 3
- 7
3-1
0 4
- 1
4-
4 4
- 7
4-1
0 5
- 1
5-
3 5
- 5
5-
8 5
-10
6-
0 6
- 2
6-
4 6
- 6
6-
8 6
-10
7-
0 7
- 2
7-
3 7
- 5
7-
7 7
- 9
7-1
0 8
- 0
24.0
1-1
0 2
- 3
2-
7 2
-11
3-
2 3
- 5
3-
8 3
-11
4-
1 4
- 4
4-
6 4
- 8
4-1
1 5
- 1
5-
3 5
- 5
5-
6 5
- 8
5-1
0 6
- 0
6-
1 6
- 3
6-
5 6
- 6
6-
8 6
- 9
6-1
1 7
- 0
7-
2
12.0
4-
1 5
- 0
5-1
0 6
- 6
7-
1 7
- 8
8-
2 8
- 8
9-
2 9
- 7
10-
010
- 5
10-1
011
- 3
11-
711
-11
12-
412
- 8
13-
013
- 3
13-
713
-11
14-
214
- 6
16.0
3-
7 4
- 4
5-
0 5
- 7
6-
2 6
- 8
7-
1 7
- 6
7-1
1 8
- 4
8-
8 9
- 1
9-
5 9
- 9
10-
010
- 4
10-
810
-11
11-
311
- 6
11-
912
- 0
12-
412
- 7
12-1
013
- 1
13-
32x
619
.2 3
- 3
4-
0 4
- 7
5-
1 5
- 7
6-
1 6
- 6
6-1
0 7
- 3
7-
7 7
-11
8-
3 8
- 7
8-1
1 9
- 2
9-
5 9
- 9
10-
010
- 3
10-
610
- 9
11-
011
- 3
11-
511
- 8
11-1
112
- 2
12-
412
- 7
24.0
2-1
1 3
- 7
4-
1 4
- 7
5-
0 5
- 5
5-1
0 6
- 2
6-
6 6
-10
7-
1 7
- 5
7-
8 7
-11
8-
2 8
- 5
8-
8 8
-11
9-
2 9
- 5
9-
7 9
-10
10-
010
- 3
10-
510
- 8
10-1
011
- 0
11-
3
12.0
5-
5 6
- 7
7-
8 8
- 7
9-
410
- 1
10-1
011
- 6
12-
112
- 8
13-
313
- 9
14-
414
-10
15-
315
- 9
16-
316
- 8
17-
117
- 6
17-1
118
- 4
18-
919
- 1
16.0
4-
8 5
- 9
6-
7 7
- 5
8-
1 8
- 9
9-
4 9
-11
10-
611
- 0
11-
611
-11
12-
512
-10
13-
313
- 8
14-
014
- 5
14-1
015
- 2
15-
615
-10
16-
316
- 7
16-1
017
- 2
17-
62x
819
.2 4
- 3
5-
3 6
- 0
6-
9 7
- 5
8-
0 8
- 7
9-
1 9
- 7
10-
010
- 6
10-1
111
- 4
11-
812
- 1
12-
512
-10
13-
213
- 6
13-1
014
- 2
14-
614
-10
15-
115
- 5
15-
816
- 0
16-
316
- 7
24.0
3-1
0 4
- 8
5-
5 6
- 0
6-
7 7
- 2
7-
8 8
- 1
8-
7 9
- 0
9-
4 9
- 9
10-
110
- 6
10-1
011
- 2
11-
611
- 9
12-
112
- 5
12-
812
-11
13-
313
- 6
13-
914
- 0
14-
414
- 7
14-1
0
12.0
6-1
1 8
- 5
9-
910
-11
11-1
112
-11
13-
914
- 8
15-
516
- 2
16-1
117
- 7
18-
318
-11
19-
620
- 1
20-
821
- 3
21-1
022
- 4
22-1
023
- 5
23-1
124
- 5
16.0
6-
0 7
- 4
8-
5 9
- 5
10-
411
- 2
11-1
112
- 8
13-
414
- 0
14-
815
- 3
15-1
016
- 4
16-1
117
- 5
17-1
118
- 5
18-1
119
- 4
19-1
020
- 3
20-
821
- 1
21-
621
-11
22-
42x
1019
.2 5
- 5
6-
8 7
- 8
8-
7 9
- 5
10-
210
-11
11-
712
- 2
12-
913
- 4
13-1
114
- 5
14-1
115
- 5
15-1
116
- 4
16-1
017
- 3
17-
818
- 1
18-
618
-11
19-
319
- 8
20-
020
- 5
20-
921
- 1
24.0
4-1
1 6
- 0
6-1
1 7
- 8
8-
5 9
- 1
9-
910
- 4
10-1
111
- 5
11-1
112
- 5
12-1
113
- 4
13-
914
- 3
14-
815
- 0
15-
515
-10
16-
216
- 6
16-1
117
- 3
17-
717
-11
18-
318
- 7
18-1
1
E12
.00.
060.
100.
160.
220.
290.
370.
450.
530.
630.
720.
820.
931.
041.
151.
261.
391.
511.
641.
771.
902.
042.
182.
322.
47E
16.0
0.05
0.09
0.14
0.19
0.25
0.32
0.39
0.46
0.54
0.62
0.71
0.80
0.90
0.99
1.10
1.20
1.31
1.42
1.53
1.65
1.77
1.89
2.01
2.14
2.27
2.40
2.54
E19
.20.
040.
080.
130.
170.
230.
290.
350.
420.
490.
570.
650.
730.
820.
911.
001.
101.
191.
291.
401.
501.
611.
721.
841.
952.
072.
192.
322.
442.
57E
24.0
0.04
0.07
0.11
0.16
0.21
0.26
0.32
0.38
0.44
0.51
0.58
0.66
0.73
0.81
0.89
0.98
1.07
1.16
1.25
1.34
1.44
1.54
1.64
1.75
1.85
1.96
2.07
2.18
2.30
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables 29
Span Tables for Joists and Rafters
TABL
E R
-17
RA
FTER
S WIT
H L
/180
DEF
LEC
TIO
N L
IMIT
ATI
ON
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
20 p
sf p
lus
Dea
d Lo
ad o
f 15
psf
det
erm
ines
the
req
uire
d be
ndin
g de
sign
val
ue.
Def
lect
ion
- Fo
r 20
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
180
.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n) 2
00 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
0028
0029
0030
00
12.0
3-
5 4
- 2
4-1
0 5
- 5
5-1
1 6
- 5
6-1
0 7
- 3
7-
8 8
- 0
8-
4 8
- 8
9-
0 9
- 4
9-
8 9
-11
10-
310
- 6
10-1
011
- 1
11-
411
- 7
11-1
012
- 1
12-
412
- 7
16.0
2-1
1 3
- 7
4-
2 4
- 8
5-
1 5
- 6
5-1
1 6
- 3
6-
7 6
-11
7-
3 7
- 6
7-1
0 8
- 1
8-
4 8
- 7
8-1
0 9
- 1
9-
4 9
- 7
9-1
010
- 0
10-
310
- 5
10-
810
-10
11-
111
- 3
11-
52x
419
.2 2
- 8
3-
4 3
-10
4-
3 4
- 8
5-
1 5
- 5
5-
9 6
- 0
6-
4 6
- 7
6-1
1 7
- 2
7-
5 7
- 8
7-1
0 8
- 1
8-
4 8
- 6
8-
9 8
-11
9-
2 9
- 4
9-
7 9
- 9
9-1
110
- 1
10-
310
- 5
24.0
2-
5 2
-11
3-
5 3
-10
4-
2 4
- 6
4-1
0 5
- 1
5-
5 5
- 8
5-1
1 6
- 2
6-
5 6
- 7
6-1
0 7
- 0
7-
3 7
- 5
7-
8 7
-10
8-
0 8
- 2
8-
4 8
- 6
8-
8 8
-10
9-
0 9
- 2
9-
4
12.0
5-
4 6
- 7
7-
7 8
- 6
9-
410
- 0
10-
911
- 5
12-
012
- 7
13-
213
- 8
14-
214
- 8
15-
215
- 8
16-
116
- 7
17-
017
- 5
17-1
018
- 2
18-
719
- 0
19-
419
- 9
16.0
4-
8 5
- 8
6-
7 7
- 4
8-
1 8
- 8
9-
4 9
-10
10-
510
-11
11-
511
-10
12-
412
- 9
13-
213
- 7
13-1
114
- 4
14-
815
- 1
15-
515
- 9
16-
116
- 5
16-
917
- 1
17-
517
- 8
18-
02x
619
.2 4
- 3
5-
2 6
- 0
6-
9 7
- 4
7-1
1 8
- 6
9-
0 9
- 6
9-1
110
- 5
10-1
011
- 3
11-
712
- 0
12-
412
- 9
13-
113
- 5
13-
914
- 1
14-
514
- 8
15-
015
- 4
15-
715
-11
16-
216
- 5
24.0
3-1
0 4
- 8
5-
4 6
- 0
6-
7 7
- 1
7-
7 8
- 1
8-
6 8
-11
9-
4 9
- 8
10-
010
- 5
10-
911
- 1
11-
511
- 8
12-
012
- 4
12-
712
-10
13-
213
- 5
13-
813
-11
14-
214
- 5
14-
8
12.0
7-
1 8
- 8
10-
011
- 2
12-
313
- 3
14-
215
- 0
15-1
016
- 7
17-
418
- 0
18-
919
- 5
20-
020
- 8
21-
321
-10
22-
422
-11
23-
624
- 0
24-
625
- 0
25-
626
- 0
16.0
6-
2 7
- 6
8-
8 9
- 8
10-
711
- 6
12-
313
- 0
13-
814
- 4
15-
015
- 7
16-
316
- 9
17-
417
-10
18-
518
-11
19-
519
-10
20-
420
- 9
21-
321
- 8
22-
122
- 6
22-1
123
- 4
23-
92x
819
.2 5
- 7
6-1
0 7
-11
8-1
0 9
- 8
10-
611
- 2
11-1
012
- 6
13-
113
- 8
14-
314
-10
15-
415
-10
16-
416
- 9
17-
317
- 8
18-
118
- 7
19-
019
- 5
19-
920
- 2
20-
720
-11
21-
421
- 8
24.0
5-
0 6
- 2
7-
1 7
-11
8-
8 9
- 4
10-
010
- 7
11-
211
- 9
12-
312
- 9
13-
313
- 8
14-
214
- 7
15-
015
- 5
15-1
016
- 3
16-
717
- 0
17-
417
- 8
18-
018
- 5
18-
919
- 1
19-
5
12.0
9-
011
- 1
12-
914
- 3
15-
816
-11
18-
119
- 2
20-
221
- 2
22-
123
- 0
23-1
124
- 9
25-
616
.0 7
-10
9-
711
- 1
12-
413
- 6
14-
815
- 8
16-
717
- 6
18-
419
- 2
19-1
120
- 8
21-
522
- 1
22-1
023
- 5
24-
124
- 9
25-
425
-11
2x10
19.2
7-
2 8
- 9
10-
111
- 3
12-
413
- 4
14-
315
- 2
15-1
116
- 9
17-
618
- 2
18-1
119
- 7
20-
220
-10
21-
522
- 0
22-
723
- 1
23-
824
- 2
24-
925
- 3
25-
924
.0 6
- 5
7-1
0 9
- 0
10-
111
- 1
11-1
112
- 9
13-
614
- 3
15-
015
- 8
16-
316
-11
17-
618
- 1
18-
719
- 2
19-
820
- 2
20-
821
- 2
21-
822
- 1
22-
723
- 0
23-
523
-11
24-
424
- 9
E12
.00.
050.
090.
140.
200.
260.
330.
400.
480.
560.
650.
740.
830.
931.
031.
141.
241.
361.
471.
591.
711.
831.
962.
092.
222.
352.
49E
16.0
0.04
0.08
0.12
0.17
0.23
0.28
0.35
0.41
0.49
0.56
0.64
0.72
0.80
0.89
0.98
1.08
1.17
1.27
1.37
1.48
1.59
1.70
1.81
1.92
2.04
2.16
2.28
2.40
2.53
E19
.20.
040.
070.
110.
160.
210.
260.
320.
380.
440.
510.
580.
660.
730.
810.
900.
981.
071.
161.
251.
351.
451.
551.
651.
751.
861.
972.
082.
192.
31E
24.0
0.04
0.07
0.10
0.14
0.18
0.23
0.28
0.34
0.40
0.46
0.52
0.59
0.66
0.73
0.80
0.88
0.96
1.04
1.12
1.21
1.29
1.38
1.48
1.57
1.66
1.76
1.86
1.96
2.06
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables for Joists and Rafters
30 Span Tables
TABL
E R
-18
RA
FTER
S WIT
H L
/180
DEF
LEC
TIO
N L
IMIT
ATI
ON
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
30 p
sf p
lus
Dea
d Lo
ad o
f 15
psf
det
erm
ines
the
req
uire
d be
ndin
g de
sign
val
ue.
Def
lect
ion
- Fo
r 30
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
180
.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n) 2
00 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
0028
0029
0030
00
12.0
3-
0 3
- 8
4-
3 4
- 9
5-
3 5
- 8
6-
0 6
- 5
6-
9 7
- 1
7-
5 7
- 8
8-
0 8
- 3
8-
6 8
- 9
9-
0 9
- 3
9-
6 9
- 9
10-
010
- 3
10-
510
- 8
10-1
011
- 1
16.0
2-
7 3
- 2
3-
8 4
- 1
4-
6 4
-11
5-
3 5
- 6
5-1
0 6
- 1
6-
5 6
- 8
6-1
1 7
- 2
7-
5 7
- 7
7-1
0 8
- 0
8-
3 8
- 5
8-
8 8
-10
9-
0 9
- 3
9-
5 9
- 7
9-
9 9
-11
10-
12x
419
.2 2
- 5
2-1
1 3
- 4
3-
9 4
- 1
4-
5 4
- 9
5-
1 5
- 4
5-
7 5
-10
6-
1 6
- 4
6-
6 6
- 9
6-1
1 7
- 2
7-
4 7
- 6
7-
9 7
-11
8-
1 8
- 3
8-
5 8
- 7
8-
9 8
-11
9-
1 9
- 3
24.0
2-
2 2
- 7
3-
0 3
- 4
3-
8 4
- 0
4-
3 4
- 6
4-
9 5
- 0
5-
3 5
- 5
5-
8 5
-10
6-
0 6
- 3
6-
5 6
- 7
6-
9 6
-11
7-
1 7
- 3
7-
5 7
- 6
7-
8 7
-10
8-
0 8
- 1
8-
3
12.0
4-
9 5
-10
6-
8 7
- 6
8-
2 8
-10
9-
610
- 0
10-
711
- 1
11-
712
- 1
12-
613
- 0
13-
513
-10
14-
214
- 7
15-
015
- 4
15-
816
- 1
16-
516
- 9
17-
117
- 5
16.0
4-
1 5
- 0
5-1
0 6
- 6
7-
1 7
- 8
8-
2 8
- 8
9-
2 9
- 7
10-
010
- 5
10-1
011
- 3
11-
711
-11
12-
412
- 8
13-
013
- 3
13-
713
-11
14-
214
- 6
14-
915
- 1
15-
415
- 7
15-1
12x
619
.2 3
- 9
4-
7 5
- 4
5-1
1 6
- 6
7-
0 7
- 6
7-1
1 8
- 4
8-
9 9
- 2
9-
6 9
-11
10-
310
- 7
10-1
111
- 3
11-
611
-10
12-
212
- 5
12-
813
- 0
13-
313
- 6
13-
914
- 0
14-
314
- 6
24.0
3-
4 4
- 1
4-
9 5
- 4
5-1
0 6
- 3
6-
8 7
- 1
7-
6 7
-10
8-
2 8
- 6
8-1
0 9
- 2
9-
6 9
- 9
10-
010
- 4
10-
710
-10
11-
111
- 4
11-
711
-10
12-
112
- 4
12-
612
- 9
13-
0
12.0
6-
3 7
- 8
8-1
0 9
-10
10-1
011
- 8
12-
613
- 3
13-1
114
- 8
15-
315
-11
16-
617
- 1
17-
818
- 2
18-
919
- 3
19-
920
- 3
20-
821
- 2
21-
722
- 1
22-
622
-11
16.0
5-
5 6
- 7
7-
8 8
- 7
9-
410
- 1
10-1
011
- 6
12-
112
- 8
13-
313
- 9
14-
414
-10
15-
315
- 9
16-
316
- 8
17-
117
- 6
17-1
118
- 4
18-
919
- 1
19-
619
-10
20-
320
- 7
20-1
12x
819
.2 4
-11
6-
0 7
- 0
7-1
0 8
- 7
9-
3 9
-10
10-
611
- 0
11-
712
- 1
12-
713
- 1
13-
613
-11
14-
514
-10
15-
215
- 7
16-
016
- 4
16-
917
- 1
17-
517
- 9
18-
118
- 5
18-
919
- 1
24.0
4-
5 5
- 5
6-
3 7
- 0
7-
8 8
- 3
8-1
0 9
- 4
9-1
010
- 4
10-1
011
- 3
11-
812
- 1
12-
612
-10
13-
313
- 7
13-1
114
- 4
14-
815
- 0
15-
315
- 7
15-1
116
- 3
16-
616
-10
17-
1
12.0
8-
0 9
- 9
11-
312
- 7
13-
914
-11
15-1
116
-11
17-1
018
- 8
19-
620
- 4
21-
121
-10
22-
623
- 3
23-1
124
- 6
25-
225
-10
16.0
6-1
1 8
- 5
9-
910
-11
11-1
112
-11
13-
914
- 8
15-
516
- 2
16-1
117
- 7
18-
318
-11
19-
620
- 1
20-
821
- 3
21-1
022
- 4
22-1
023
- 5
23-1
124
- 5
24-1
025
- 4
25-1
02x
1019
.2 6
- 4
7-
8 8
-11
9-1
110
-11
11-
912
- 7
13-
414
- 1
14-
915
- 5
16-
116
- 8
17-
317
-10
18-
418
-11
19-
519
-11
20-
520
-10
21-
421
-10
22-
322
- 8
23-
123
- 7
24-
024
- 5
24.0
5-
8 6
-11
8-
0 8
-11
9-
910
- 6
11-
311
-11
12-
713
- 2
13-
914
- 4
14-1
115
- 5
15-1
116
- 5
16-1
117
- 4
17-1
018
- 3
18-
819
- 1
19-
619
-11
20-
420
- 8
21-
121
- 5
21-1
0
E12
.00.
050.
090.
150.
200.
270.
340.
410.
490.
580.
670.
760.
860.
961.
061.
171.
281.
391.
511.
631.
761.
882.
012.
152.
282.
422.
56E
16.0
0.04
0.08
0.13
0.18
0.23
0.29
0.36
0.43
0.50
0.58
0.66
0.74
0.83
0.92
1.01
1.11
1.21
1.31
1.41
1.52
1.63
1.74
1.86
1.98
2.10
2.22
2.34
2.47
2.60
E19
.20.
040.
080.
120.
160.
210.
270.
330.
390.
460.
530.
600.
680.
760.
840.
921.
011.
101.
201.
291.
391.
491.
591.
701.
801.
912.
032.
142.
252.
37E
24.0
0.04
0.07
0.10
0.14
0.19
0.24
0.29
0.35
0.41
0.47
0.54
0.61
0.68
0.75
0.83
0.90
0.99
1.07
1.15
1.24
1.33
1.42
1.52
1.61
1.71
1.81
1.91
2.02
2.12
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables 31
Span Tables for Joists and Rafters
TABL
E R
-19
RA
FTER
S WIT
H L
/180
DEF
LEC
TIO
N L
IMIT
ATI
ON
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
40 p
sf p
lus
Dea
d Lo
ad o
f 15
psf
det
erm
ines
the
req
uire
d be
ndin
g de
sign
val
ue.
Def
lect
ion
- Fo
r 40
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
180
.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n) 2
00 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
0028
0029
0030
00
12.0
2-
9 3
- 4
3-1
0 4
- 4
4-
9 5
- 1
5-
5 5
- 9
6-
1 6
- 5
6-
8 6
-11
7-
3 7
- 6
7-
8 7
-11
8-
2 8
- 5
8-
7 8
-10
9-
0 9
- 3
9-
5 9
- 8
9-1
010
- 0
16.0
2-
4 2
-11
3-
4 3
- 9
4-
1 4
- 5
4-
9 5
- 0
5-
3 5
- 6
5-
9 6
- 0
6-
3 6
- 6
6-
8 6
-11
7-
1 7
- 3
7-
6 7
- 8
7-1
0 8
- 0
8-
2 8
- 4
8-
6 8
- 8
8-1
0 9
- 0
9-
22x
419
.2 2
- 2
2-
8 3
- 1
3-
5 3
- 9
4-
0 4
- 4
4-
7 4
-10
5-
1 5
- 3
5-
6 5
- 8
5-1
1 6
- 1
6-
3 6
- 6
6-
8 6
-10
7-
0 7
- 2
7-
4 7
- 6
7-
7 7
- 9
7-1
1 8
- 1
8-
2 8
- 4
24.0
1-1
1 2
- 4
2-
9 3
- 1
3-
4 3
- 7
3-1
0 4
- 1
4-
4 4
- 6
4-
9 4
-11
5-
1 5
- 3
5-
5 5
- 7
5-
9 5
-11
6-
1 6
- 3
6-
5 6
- 6
6-
8 6
-10
6-1
1 7
- 1
7-
3 7
- 4
7-
6
12.0
4-
3 5
- 3
6-
1 6
- 9
7-
5 8
- 0
8-
7 9
- 1
9-
710
- 0
10-
610
-11
11-
411
- 9
12-
112
- 6
12-1
013
- 2
13-
613
-10
14-
214
- 6
14-1
015
- 2
15-
515
- 9
16.0
3-
8 4
- 6
5-
3 5
-10
6-
5 6
-11
7-
5 7
-10
8-
3 8
- 8
9-
1 9
- 5
9-1
010
- 2
10-
610
-10
11-
111
- 5
11-
912
- 0
12-
412
- 7
12-1
013
- 1
13-
413
- 7
13-1
014
- 1
14-
42x
619
.2 3
- 5
4-
2 4
- 9
5-
4 5
-10
6-
4 6
- 9
7-
2 7
- 7
7-1
1 8
- 3
8-
8 8
-11
9-
3 9
- 7
9-1
010
- 2
10-
510
- 8
11-
011
- 3
11-
611
- 9
12-
012
- 2
12-
512
- 8
12-1
113
- 1
24.0
3-
0 3
- 8
4-
3 4
- 9
5-
3 5
- 8
6-
1 6
- 5
6-
9 7
- 1
7-
5 7
- 9
8-
0 8
- 3
8-
7 8
-10
9-
1 9
- 4
9-
7 9
-10
10-
010
- 3
10-
610
- 8
10-1
111
- 1
11-
411
- 6
11-
9
12.0
5-
8 6
-11
8-
0 8
-11
9-
910
- 7
11-
312
- 0
12-
713
- 3
13-1
014
- 5
14-1
115
- 5
16-
016
- 5
16-1
117
- 5
17-1
018
- 3
18-
919
- 2
19-
719
-11
20-
420
- 9
16.0
4-1
1 6
- 0
6-1
1 7
- 9
8-
6 9
- 2
9-
910
- 4
10-1
111
- 6
12-
012
- 6
12-1
113
- 5
13-1
014
- 3
14-
815
- 1
15-
515
-10
16-
316
- 7
16-1
117
- 3
17-
718
- 0
18-
318
- 7
18-1
12x
819
.2 4
- 6
5-
6 6
- 4
7-
1 7
- 9
8-
4 8
-11
9-
610
- 0
10-
610
-11
11-
511
-10
12-
312
- 7
13-
013
- 5
13-
914
- 1
14-
614
-10
15-
215
- 5
15-
916
- 1
16-
516
- 8
17-
017
- 3
24.0
4-
0 4
-11
5-
8 6
- 4
6-1
1 7
- 6
8-
0 8
- 6
8-1
1 9
- 4
9-
910
- 2
10-
710
-11
11-
311
- 8
12-
012
- 4
12-
712
-11
13-
313
- 6
13-1
014
- 1
14-
514
- 8
14-1
115
- 2
15-
5
12.0
7-
2 8
-10
10-
211
- 5
12-
613
- 6
14-
515
- 3
16-
116
-11
17-
818
- 4
19-
119
- 9
20-
421
- 0
21-
722
- 2
22-
923
- 4
23-1
124
- 5
24-1
125
- 6
26-
016
.0 6
- 3
7-
8 8
-10
9-1
010
-10
11-
812
- 6
13-
313
-11
14-
815
- 3
15-1
116
- 6
17-
117
- 8
18-
218
- 9
19-
319
- 9
20-
220
- 8
21-
221
- 7
22-
122
- 6
22-1
123
- 4
23-
924
- 2
2x10
19.2
5-
8 7
- 0
8-
1 9
- 0
9-1
010
- 8
11-
512
- 1
12-
913
- 4
13-1
114
- 6
15-
115
- 7
16-
116
- 7
17-
117
- 7
18-
018
- 5
18-1
119
- 4
19-
920
- 2
20-
620
-11
21-
421
- 8
22-
124
.0 5
- 1
6-
3 7
- 2
8-
1 8
-10
9-
610
- 2
10-1
011
- 5
11-1
112
- 6
13-
013
- 6
13-1
114
- 5
14-1
015
- 3
15-
816
- 1
16-
616
-11
17-
317
- 8
18-
018
- 4
18-
919
- 1
19-
519
- 9
E12
.00.
050.
090.
140.
200.
260.
330.
410.
490.
570.
660.
750.
840.
941.
051.
151.
261.
381.
491.
611.
731.
861.
992.
122.
252.
392.
53E
16.0
0.04
0.08
0.12
0.17
0.23
0.29
0.35
0.42
0.49
0.57
0.65
0.73
0.82
0.91
1.00
1.09
1.19
1.29
1.40
1.50
1.61
1.72
1.83
1.95
2.07
2.19
2.31
2.44
2.56
E19
.20.
040.
070.
110.
160.
210.
260.
320.
380.
450.
520.
590.
670.
750.
830.
911.
001.
091.
181.
271.
371.
471.
571.
671.
781.
892.
002.
112.
222.
34E
24.0
0.04
0.07
0.10
0.14
0.19
0.24
0.29
0.34
0.40
0.46
0.53
0.60
0.67
0.74
0.82
0.89
0.97
1.06
1.14
1.23
1.31
1.41
1.50
1.59
1.69
1.79
1.89
1.99
2.09
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables for Joists and Rafters
32 Span Tables
TABL
E R
-20
RA
FTER
S WIT
H L
/180
DEF
LEC
TIO
N L
IMIT
S
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
50 p
sf p
lus
dead
loa
dof
15
psf
dete
rmin
es t
he r
equi
red
bend
ing
desi
gn v
alue
.D
efle
ctio
n -
For
50 p
sf l
ive
load
.Li
mite
d to
spa
n in
inc
hes
divi
ded
by 1
80.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n) 2
00 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
0028
0029
0030
00
12.0
2-
6 3
- 1
3-
7 4
- 0
4-
4 4
- 8
5-
0 5
- 4
5-
7 5
-11
6-
2 6
- 5
6-
8 6
-10
7-
1 7
- 4
7-
6 7
- 9
7-1
1 8
- 1
8-
4 8
- 6
8-
8 8
-10
9-
0 9
- 3
9-
516
.0 2
- 2
2-
8 3
- 1
3-
5 3
- 9
4-
1 4
- 4
4-
7 4
-10
5-
1 5
- 4
5-
6 5
- 9
5-1
1 6
- 2
6-
4 6
- 6
6-
8 6
-10
7-
0 7
- 2
7-
4 7
- 6
7-
8 7
-10
8-
0 8
- 1
8-
3 8
- 5
2x 4
19.2
2-
0 2
- 5
2-1
0 3
- 2
3-
5 3
- 8
4-
0 4
- 2
4-
5 4
- 8
4-1
0 5
- 1
5-
3 5
- 5
5-
7 5
- 9
5-1
1 6
- 1
6-
3 6
- 5
6-
7 6
- 9
6-1
0 7
- 0
7-
2 7
- 3
7-
5 7
- 7
7-
824
.0 1
- 9
2-
2 2
- 6
2-1
0 3
- 1
3-
4 3
- 7
3-
9 4
- 0
4-
2 4
- 4
4-
6 4
- 8
4-1
0 5
- 0
5-
2 5
- 4
5-
6 5
- 7
5-
9 5
-11
6-
0 6
- 2
6-
3 6
- 5
6-
6 6
- 8
6-
9 6
-10
12.0
3-1
1 4
-10
5-
7 6
- 3
6-1
0 7
- 4
7-1
1 8
- 4
8-1
0 9
- 3
9-
810
- 0
10-
510
- 9
11-
211
- 6
11-1
012
- 2
12-
512
- 9
13-
113
- 4
13-
813
-11
14-
214
- 6
14-
916
.0 3
- 5
4-
2 4
-10
5-
5 5
-11
6-
5 6
-10
7-
3 7
- 8
8-
0 8
- 4
8-
8 9
- 0
9-
4 9
- 8
9-1
110
- 3
10-
610
- 9
11-
111
- 4
11-
711
-10
12-
112
- 4
12-
612
- 9
13-
013
- 3
2x 6
19.2
3-
1 3
-10
4-
5 4
-11
5-
5 5
-10
6-
3 6
- 7
7-
0 7
- 4
7-
8 7
-11
8-
3 8
- 6
8-1
0 9
- 1
9-
4 9
- 7
9-1
010
- 1
10-
410
- 7
10-
911
- 0
11-
311
- 5
11-
811
-10
12-
124
.0 2
- 9
3-
5 3
-11
4-
5 4
-10
5-
3 5
- 7
5-1
1 6
- 3
6-
6 6
-10
7-
1 7
- 4
7-
8 7
-11
8-
1 8
- 4
8-
7 8
-10
9-
0 9
- 3
9-
5 9
- 8
9-1
010
- 0
10-
310
- 5
10-
710
- 9
12.0
5-
2 6
- 4
7-
4 8
- 3
9-
0 9
- 9
10-
511
- 0
11-
712
- 2
12-
913
- 3
13-
914
- 3
14-
815
- 2
15-
716
- 0
16-
516
-10
17-
317
- 7
18-
018
- 4
18-
919
- 1
19-
516
.0 4
- 6
5-
6 6
- 4
7-
1 7
- 9
8-
5 9
- 0
9-
610
- 1
10-
711
- 0
11-
611
-11
12-
412
- 9
13-
113
- 6
13-1
014
- 3
14-
714
-11
15-
315
- 7
15-1
116
- 3
16-
616
-10
17-
117
- 5
2x 8
19.2
4-
1 5
- 0
5-1
0 6
- 6
7-
1 7
- 8
8-
3 8
- 8
9-
2 9
- 8
10-
110
- 6
10-1
011
- 3
11-
712
- 0
12-
412
- 8
13-
013
- 4
13-
713
-11
14-
314
- 6
14-1
015
- 1
15-
415
- 8
15-1
124
.0 3
- 8
4-
6 5
- 2
5-1
0 6
- 4
6-1
0 7
- 4
7-
9 8
- 3
8-
7 9
- 0
9-
4 9
- 9
10-
110
- 5
10-
811
- 0
11-
411
- 7
11-1
112
- 2
12-
512
- 9
13-
013
- 3
13-
613
- 9
14-
014
- 3
12.0
6-
7 8
- 1
9-
410
- 6
11-
612
- 5
13-
314
- 1
14-1
015
- 6
16-
316
-11
17-
618
- 2
18-
919
- 4
19-1
020
- 5
20-1
121
- 6
22-
022
- 6
22-1
123
- 5
23-1
124
- 4
24-
916
.0 5
- 9
7-
0 8
- 1
9-
1 9
-11
10-
911
- 6
12-
212
-10
13-
514
- 1
14-
815
- 2
15-
916
- 3
16-
917
- 3
17-
818
- 2
18-
719
- 0
19-
519
-10
20-
320
- 8
21-
121
- 6
21-1
022
- 3
2x10
19.2
5-
3 6
- 5
7-
5 8
- 3
9-
1 9
-10
10-
611
- 1
11-
912
- 3
12-1
013
- 4
13-1
014
- 4
14-1
015
- 3
15-
916
- 2
16-
717
- 0
17-
417
- 9
18-
218
- 6
18-1
119
- 3
19-
719
-11
20-
324
.0 4
- 8
5-
9 6
- 7
7-
5 8
- 1
8-
9 9
- 4
9-1
110
- 6
11-
011
- 6
11-1
112
- 5
12-1
013
- 3
13-
814
- 1
14-
514
-10
15-
215
- 6
15-1
116
- 3
16-
716
-11
17-
317
- 6
17-1
018
- 2
E12
.00.
050.
090.
140.
200.
260.
320.
400.
470.
550.
640.
730.
820.
921.
021.
121.
231.
341.
451.
571.
691.
811.
932.
062.
192.
322.
462.
60E
16.0
0.04
0.08
0.12
0.17
0.22
0.28
0.34
0.41
0.48
0.55
0.63
0.71
0.80
0.88
0.97
1.06
1.16
1.26
1.36
1.46
1.57
1.67
1.78
1.90
2.01
2.13
2.25
2.37
2.49
E19
.20.
040.
070.
110.
150.
200.
260.
310.
370.
440.
510.
580.
650.
730.
810.
890.
971.
061.
151.
241.
331.
431.
531.
631.
731.
841.
942.
052.
162.
28E
24.0
0.04
0.06
0.10
0.14
0.18
0.23
0.28
0.33
0.39
0.45
0.52
0.58
0.65
0.72
0.79
0.87
0.95
1.03
1.11
1.19
1.28
1.37
1.46
1.55
1.64
1.74
1.84
1.94
2.04
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables 33
Span Tables for Joists and Rafters
TABL
E R
-21
RA
FTER
S WIT
H L
/180
DEF
LEC
TIO
N L
IMIT
ATI
ON
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
20 p
sf p
lus
Dea
d Lo
ad o
f 20
psf
det
erm
ines
the
req
uire
d be
ndin
g de
sign
val
ue.
Def
lect
ion
- Fo
r 20
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
180
.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n)20
0 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
0028
0029
0030
00
12.0
3-
2 3
-11
4-
6 5
- 1
5-
6 6
- 0
6-
5 6
- 9
7-
2 7
- 6
7-1
0 8
- 2
8-
5 8
- 9
9-
0 9
- 4
9-
7 9
-10
10-
110
- 4
10-
710
-10
11-
111
- 4
11-
611
- 9
11-1
112
- 2
12-
416
.0 2
- 9
3-
5 3
-11
4-
4 4
-10
5-
2 5
- 6
5-1
0 6
- 2
6-
6 6
- 9
7-
1 7
- 4
7-
7 7
-10
8-
1 8
- 4
8-
6 8
- 9
9-
0 9
- 2
9-
5 9
- 7
9-
910
- 0
10-
210
- 4
10-
610
- 9
2x 4
19.2
2-
6 3
- 1
3-
7 4
- 0
4-
4 4
- 9
5-
1 5
- 4
5-
8 5
-11
6-
2 6
- 5
6-
8 6
-11
7-
2 7
- 4
7-
7 7
- 9
8-
0 8
- 2
8-
5 8
- 7
8-
9 8
-11
9-
1 9
- 3
9-
5 9
- 7
9-
924
.0 2
- 3
2-
9 3
- 2
3-
7 3
-11
4-
3 4
- 6
4-1
0 5
- 1
5-
4 5
- 6
5-
9 6
- 0
6-
2 6
- 5
6-
7 6
- 9
7-
0 7
- 2
7-
4 7
- 6
7-
8 7
-10
8-
0 8
- 2
8-
4 8
- 5
8-
7 8
- 9
12.0
5-
0 6
- 2
7-
1 7
-11
8-
8 9
- 5
10-
010
- 8
11-
311
- 9
12-
412
-10
13-
313
- 9
14-
214
- 8
15-
115
- 6
15-1
116
- 3
16-
817
- 0
17-
517
- 9
18-
118
- 5
18-
919
- 1
19-
516
.0 4
- 4
5-
4 6
- 2
6-1
0 7
- 6
8-
2 8
- 8
9-
3 9
- 9
10-
210
- 8
11-
111
- 6
11-1
112
- 4
12-
813
- 1
13-
513
- 9
14-
114
- 5
14-
915
- 1
15-
415
- 8
16-
016
- 3
16-
716
-10
2x 6
19.2
4-
0 4
-10
5-
7 6
- 3
6-1
0 7
- 5
7-1
1 8
- 5
8-1
1 9
- 4
9-
910
- 1
10-
610
-10
11-
311
- 7
11-1
112
- 3
12-
712
-10
13-
213
- 6
13-
914
- 0
14-
414
- 7
14-1
015
- 1
15-
424
.0 3
- 7
4-
4 5
- 0
5-
7 6
- 2
6-
8 7
- 1
7-
6 7
-11
8-
4 8
- 8
9-
1 9
- 5
9-
910
- 0
10-
410
- 8
10-1
111
- 3
11-
611
- 9
12-
012
- 4
12-
712
-10
13-
113
- 3
13-
613
- 9
12.0
6-
7 8
- 1
9-
410
- 6
11-
612
- 5
13-
314
- 0
14-1
015
- 6
16-
316
-10
17-
618
- 1
18-
919
- 4
19-1
020
- 5
20-1
121
- 5
21-1
122
- 5
22-1
123
- 5
23-1
024
- 4
24-
925
- 2
25-
816
.0 5
- 9
7-
0 8
- 1
9-
1 9
-11
10-
911
- 6
12-
212
-10
13-
514
- 0
14-
715
- 2
15-
816
- 3
16-
917
- 2
17-
818
- 1
18-
719
- 0
19-
519
-10
20-
320
- 8
21-
121
- 5
21-1
022
- 2
2x 8
19.2
5-
3 6
- 5
7-
5 8
- 3
9-
1 9
- 9
10-
611
- 1
11-
812
- 3
12-1
013
- 4
13-1
014
- 4
14-1
015
- 3
15-
816
- 2
16-
716
-11
17-
417
- 9
18-
118
- 6
18-1
019
- 3
19-
719
-11
20-
324
.0 4
- 8
5-
9 6
- 7
7-
5 8
- 1
8-
9 9
- 4
9-1
110
- 6
11-
011
- 6
11-1
112
- 5
12-1
013
- 3
13-
814
- 0
14-
514
-10
15-
215
- 6
15-1
016
- 3
16-
716
-10
17-
217
- 6
17-1
018
- 1
12.0
8-
510
- 4
11-1
113
- 4
14-
815
-10
16-1
117
-11
18-1
119
-10
20-
821
- 6
22-
423
- 1
23-1
124
- 7
25-
426
- 0
16.0
7-
4 8
-11
10-
411
- 7
12-
813
- 8
14-
815
- 6
16-
417
- 2
17-1
118
- 8
19-
420
- 0
20-
821
- 4
21-1
122
- 6
23-
123
- 8
24-
324
-10
25-
425
-10
2x10
19.2
6-
8 8
- 2
9-
510
- 7
11-
712
- 6
13-
414
- 2
14-1
115
- 8
16-
417
- 0
17-
818
- 3
18-1
119
- 6
20-
020
- 7
21-
121
- 8
22-
222
- 8
23-
123
- 7
24-
124
- 6
25-
025
- 5
25-1
024
.0 6
- 0
7-
4 8
- 5
9-
510
- 4
11-
211
-11
12-
813
- 4
14-
014
- 8
15-
315
-10
16-
416
-11
17-
517
-11
18-
518
-11
19-
419
-10
20-
320
- 8
21-
121
- 6
21-1
122
- 4
22-
923
- 1
E12
.00.
040.
080.
120.
160.
210.
270.
330.
390.
460.
530.
600.
680.
760.
840.
931.
021.
111.
201.
301.
401.
501.
601.
711.
821.
932.
042.
152.
272.
39E
16.0
0.04
0.07
0.10
0.14
0.18
0.23
0.28
0.34
0.40
0.46
0.52
0.59
0.66
0.73
0.80
0.88
0.96
1.04
1.13
1.21
1.30
1.39
1.48
1.57
1.67
1.76
1.86
1.96
2.07
E19
.20.
030.
060.
090.
130.
170.
210.
260.
310.
360.
420.
480.
540.
600.
670.
730.
800.
880.
951.
031.
101.
181.
271.
351.
441.
521.
611.
701.
791.
89E
24.0
0.03
0.05
0.08
0.11
0.15
0.19
0.23
0.28
0.32
0.37
0.43
0.48
0.54
0.60
0.66
0.72
0.78
0.85
0.92
0.99
1.06
1.13
1.21
1.28
1.36
1.44
1.52
1.60
1.69
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables for Joists and Rafters
34 Span Tables
TABL
E R
-22
RA
FTER
S WIT
H L
/180
DEF
LEC
TIO
N L
IMIT
ATI
ON
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
30 p
sf p
lus
Dea
d Lo
ad o
f 20
psf
det
erm
ines
the
req
uire
d be
ndin
g de
sign
val
ue.
Def
lect
ion
- Fo
r 30
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
180
.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n) 2
00 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
0028
0029
0030
00
12.0
2-1
0 3
- 6
4-
0 4
- 6
4-1
1 5
- 4
5-
9 6
- 1
6-
5 6
- 8
7-
0 7
- 3
7-
7 7
-10
8-
1 8
- 4
8-
7 8
-10
9-
0 9
- 3
9-
6 9
- 8
9-1
110
- 1
10-
410
- 6
10-
810
-11
11-
116
.0 2
- 6
3-
0 3
- 6
3-1
1 4
- 3
4-
8 4
-11
5-
3 5
- 6
5-1
0 6
- 1
6-
4 6
- 7
6-
9 7
- 0
7-
3 7
- 5
7-
8 7
-10
8-
0 8
- 2
8-
5 8
- 7
8-
9 8
-11
9-
1 9
- 3
9-
5 9
- 7
2x 4
19.2
2-
3 2
- 9
3-
2 3
- 7
3-1
1 4
- 3
4-
6 4
-10
5-
1 5
- 4
5-
6 5
- 9
6-
0 6
- 2
6-
5 6
- 7
6-
9 7
- 0
7-
2 7
- 4
7-
6 7
- 8
7-1
0 8
- 0
8-
2 8
- 4
8-
5 8
- 7
8-
924
.0 2
- 0
2-
6 2
-10
3-
2 3
- 6
3-
9 4
- 0
4-
3 4
- 6
4-
9 4
-11
5-
2 5
- 4
5-
6 5
- 9
5-1
1 6
- 1
6-
3 6
- 5
6-
7 6
- 8
6-1
0 7
- 0
7-
2 7
- 3
7-
5 7
- 7
7-
8 7
-10
12.0
4-
6 5
- 6
6-
4 7
- 1
7-
9 8
- 5
9-
0 9
- 6
10-
010
- 6
11-
011
- 5
11-1
112
- 4
12-
813
- 1
13-
613
-10
14-
214
- 7
14-1
115
- 3
15-
715
-11
16-
216
- 6
16-1
017
- 1
17-
516
.0 3
-11
4-
9 5
- 6
6-
2 6
- 9
7-
3 7
- 9
8-
3 8
- 8
9-
1 9
- 6
9-1
110
- 3
10-
811
- 0
11-
411
- 8
12-
012
- 4
12-
712
-11
13-
213
- 6
13-
914
- 0
14-
314
- 7
14-1
015
- 1
2x 6
19.2
3-
7 4
- 4
5-
0 5
- 7
6-
2 6
- 8
7-
1 7
- 6
7-1
1 8
- 4
8-
8 9
- 1
9-
5 9
- 9
10-
010
- 4
10-
810
-11
11-
311
- 6
11-
912
- 0
12-
412
- 7
12-1
013
- 1
13-
313
- 6
13-
924
.0 3
- 2
3-1
1 4
- 6
5-
0 5
- 6
5-1
1 6
- 4
6-
9 7
- 1
7-
5 7
- 9
8-
1 8
- 5
8-
8 9
- 0
9-
3 9
- 6
9-
910
- 0
10-
310
- 6
10-
911
- 0
11-
311
- 5
11-
811
-11
12-
112
- 4
12.0
5-1
1 7
- 3
8-
4 9
- 4
10-
311
- 1
11-1
012
- 7
13-
313
-11
14-
615
- 1
15-
816
- 3
16-
917
- 3
17-
918
- 3
18-
919
- 2
19-
820
- 1
20-
620
-11
21-
421
- 9
22-
222
- 6
22-1
116
.0 5
- 2
6-
3 7
- 3
8-
1 8
-11
9-
710
- 3
10-1
011
- 6
12-
012
- 7
13-
113
- 7
14-
014
- 6
14-1
115
- 5
15-1
016
- 3
16-
717
- 0
17-
517
- 9
18-
118
- 6
18-1
019
- 2
19-
619
-10
2x 8
19.2
4-
8 5
- 9
6-
7 7
- 5
8-
1 8
- 9
9-
4 9
-11
10-
611
- 0
11-
611
-11
12-
512
-10
13-
313
- 8
14-
014
- 5
14-1
015
- 2
15-
615
-10
16-
316
- 7
16-1
017
- 2
17-
617
-10
18-
124
.0 4
- 2
5-
2 5
-11
6-
7 7
- 3
7-1
0 8
- 4
8-1
1 9
- 4
9-1
010
- 3
10-
811
- 1
11-
611
-10
12-
212
- 7
12-1
113
- 3
13-
713
-11
14-
214
- 6
14-1
015
- 1
15-
515
- 8
15-1
116
- 3
12.0
7-
7 9
- 3
10-
811
-11
13-
114
- 2
15-
116
- 0
16-1
117
- 9
18-
619
- 3
20-
020
- 8
21-
422
- 0
22-
823
- 3
23-1
124
- 6
25-
125
- 7
16.0
6-
6 8
- 0
9-
310
- 4
11-
412
- 3
13-
113
-10
14-
815
- 4
16-
016
- 8
17-
417
-11
18-
619
- 1
19-
720
- 2
20-
821
- 2
21-
822
- 2
22-
823
- 1
23-
724
- 0
24-
624
-11
25-
42x
1019
.2 6
- 0
7-
4 8
- 5
9-
510
- 4
11-
211
-11
12-
813
- 4
14-
014
- 8
15-
315
-10
16-
416
-11
17-
517
-11
18-
518
-11
19-
419
-10
20-
320
- 8
21-
121
- 6
21-1
122
- 4
22-
923
- 1
24.0
5-
4 6
- 6
7-
7 8
- 5
9-
310
- 0
10-
811
- 4
11-1
112
- 6
13-
113
- 7
14-
214
- 8
15-
115
- 7
16-
016
- 6
16-1
117
- 4
17-
918
- 1
18-
618
-11
19-
319
- 7
20-
020
- 4
20-
8
E12
.00.
040.
080.
120.
170.
230.
290.
350.
420.
490.
570.
650.
730.
820.
911.
001.
091.
191.
291.
391.
501.
611.
721.
831.
952.
072.
192.
312.
432.
56E
16.0
0.04
0.07
0.11
0.15
0.20
0.25
0.31
0.36
0.43
0.49
0.56
0.63
0.71
0.78
0.86
0.95
1.03
1.12
1.21
1.30
1.39
1.49
1.59
1.69
1.79
1.89
2.00
2.11
2.22
E19
.20.
030.
060.
100.
140.
180.
230.
280.
330.
390.
450.
510.
580.
650.
720.
790.
860.
941.
021.
101.
191.
271.
361.
451.
541.
631.
731.
831.
922.
03E
24.0
0.03
0.06
0.09
0.12
0.16
0.20
0.25
0.30
0.35
0.40
0.46
0.52
0.58
0.64
0.71
0.77
0.84
0.91
0.99
1.06
1.14
1.22
1.30
1.38
1.46
1.55
1.63
1.72
1.81
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables 35
Span Tables for Joists and Rafters
TABL
E R
-23
RA
FTER
S WIT
H L
/180
DEF
LEC
TIO
N L
IMIT
ATI
ON
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
40 p
sf p
lus
Dea
d Lo
ad o
f 20
psf
det
erm
ines
the
req
uire
d be
ndin
g de
sign
val
ue.
Def
lect
ion
- Fo
r 40
psf
liv
e lo
ad.
Lim
ited
to s
pan
in i
nche
s di
vide
d by
180
.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n) 2
00 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
0028
0029
0030
00
12.0
2-
7 3
- 2
3-
8 4
- 1
4-
6 4
-11
5-
3 5
- 6
5-1
0 6
- 1
6-
5 6
- 8
6-1
1 7
- 2
7-
5 7
- 7
7-1
0 8
- 0
8-
3 8
- 5
8-
8 8
-10
9-
0 9
- 3
9-
5 9
- 7
9-
9 9
-11
10-
116
.0 2
- 3
2-
9 3
- 2
3-
7 3
-11
4-
3 4
- 6
4-1
0 5
- 1
5-
4 5
- 6
5-
9 6
- 0
6-
2 6
- 5
6-
7 6
- 9
7-
0 7
- 2
7-
4 7
- 6
7-
8 7
-10
8-
0 8
- 2
8-
4 8
- 5
8-
7 8
- 9
2x 4
19.2
2-
1 2
- 6
2-1
1 3
- 3
3-
7 3
-10
4-
1 4
- 4
4-
7 4
-10
5-
1 5
- 3
5-
5 5
- 8
5-1
0 6
- 0
6-
2 6
- 4
6-
6 6
- 8
6-1
0 7
- 0
7-
2 7
- 3
7-
5 7
- 7
7-
9 7
-10
8-
024
.0 1
-10
2-
3 2
- 7
2-1
1 3
- 2
3-
5 3
- 8
3-1
1 4
- 1
4-
4 4
- 6
4-
8 4
-11
5-
1 5
- 3
5-
5 5
- 6
5-
8 5
-10
6-
0 6
- 1
6-
3 6
- 5
6-
6 6
- 8
6-
9 6
-11
7-
0 7
- 2
12.0
4-
1 5
- 0
5-1
0 6
- 6
7-
1 7
- 8
8-
2 8
- 8
9-
2 9
- 7
10-
010
- 5
10-1
011
- 3
11-
711
-11
12-
412
- 8
13-
013
- 3
13-
713
-11
14-
214
- 6
14-
915
- 1
15-
415
- 7
15-1
116
.0 3
- 7
4-
4 5
- 0
5-
7 6
- 2
6-
8 7
- 1
7-
6 7
-11
8-
4 8
- 8
9-
1 9
- 5
9-
910
- 0
10-
410
- 8
10-1
111
- 3
11-
611
- 9
12-
012
- 4
12-
712
-10
13-
113
- 3
13-
613
- 9
2x 6
19.2
3-
3 4
- 0
4-
7 5
- 1
5-
7 6
- 1
6-
6 6
-10
7-
3 7
- 7
7-1
1 8
- 3
8-
7 8
-11
9-
2 9
- 5
9-
910
- 0
10-
310
- 6
10-
911
- 0
11-
311
- 5
11-
811
-11
12-
212
- 4
12-
724
.0 2
-11
3-
7 4
- 1
4-
7 5
- 0
5-
5 5
-10
6-
2 6
- 6
6-1
0 7
- 1
7-
5 7
- 8
7-1
1 8
- 2
8-
5 8
- 8
8-1
1 9
- 2
9-
5 9
- 7
9-1
010
- 0
10-
310
- 5
10-
810
-10
11-
011
- 3
12.0
5-
5 6
- 7
7-
8 8
- 7
9-
410
- 1
10-1
011
- 6
12-
112
- 8
13-
313
- 9
14-
414
-10
15-
315
- 9
16-
316
- 8
17-
117
- 6
17-1
118
- 4
18-
919
- 1
19-
619
-10
20-
320
- 7
20-1
116
.0 4
- 8
5-
9 6
- 7
7-
5 8
- 1
8-
9 9
- 4
9-1
110
- 6
11-
011
- 6
11-1
112
- 5
12-1
013
- 3
13-
814
- 0
14-
514
-10
15-
215
- 6
15-1
016
- 3
16-
716
-10
17-
217
- 6
17-1
018
- 1
2x 8
19.2
4-
3 5
- 3
6-
0 6
- 9
7-
5 8
- 0
8-
7 9
- 1
9-
710
- 0
10-
610
-11
11-
411
- 8
12-
112
- 5
12-1
013
- 2
13-
613
-10
14-
214
- 6
14-1
015
- 1
15-
515
- 8
16-
016
- 3
16-
724
.0 3
-10
4-
8 5
- 5
6-
0 6
- 7
7-
2 7
- 8
8-
1 8
- 7
9-
0 9
- 4
9-
910
- 1
10-
610
-10
11-
211
- 6
11-
912
- 1
12-
512
- 8
12-1
113
- 3
13-
613
- 9
14-
014
- 4
14-
714
-10
12.0
6-1
1 8
- 5
9-
910
-11
11-1
112
-11
13-
914
- 8
15-
516
- 2
16-1
117
- 7
18-
318
-11
19-
620
- 1
20-
821
- 3
21-1
022
- 4
22-1
023
- 5
23-1
124
- 5
24-1
025
- 4
25-1
016
.0 6
- 0
7-
4 8
- 5
9-
510
- 4
11-
211
-11
12-
813
- 4
14-
014
- 8
15-
315
-10
16-
416
-11
17-
517
-11
18-
518
-11
19-
419
-10
20-
320
- 8
21-
121
- 6
21-1
122
- 4
22-
923
- 1
2x10
19.2
5-
5 6
- 8
7-
8 8
- 7
9-
510
- 2
10-1
111
- 7
12-
212
- 9
13-
413
-11
14-
514
-11
15-
515
-11
16-
416
-10
17-
317
- 8
18-
118
- 6
18-1
119
- 3
19-
820
- 0
20-
520
- 9
21-
124
.0 4
-11
6-
0 6
-11
7-
8 8
- 5
9-
1 9
- 9
10-
410
-11
11-
511
-11
12-
512
-11
13-
413
- 9
14-
314
- 8
15-
015
- 5
15-1
016
- 2
16-
616
-11
17-
317
- 7
17-1
118
- 3
18-
718
-11
E12
.00.
040.
080.
130.
180.
230.
290.
360.
430.
500.
580.
660.
740.
830.
921.
011.
111.
211.
311.
411.
521.
631.
741.
861.
982.
102.
222.
342.
472.
60E
16.0
0.04
0.07
0.11
0.15
0.20
0.25
0.31
0.37
0.43
0.50
0.57
0.64
0.72
0.80
0.88
0.96
1.05
1.13
1.22
1.32
1.41
1.51
1.61
1.71
1.82
1.92
2.03
2.14
2.25
E19
.20.
040.
060.
100.
140.
180.
230.
280.
340.
400.
460.
520.
590.
650.
730.
800.
880.
951.
041.
121.
201.
291.
381.
471.
561.
661.
751.
851.
952.
05E
24.0
0.03
0.06
0.09
0.13
0.16
0.21
0.25
0.30
0.35
0.41
0.46
0.52
0.59
0.65
0.72
0.78
0.85
0.93
1.00
1.08
1.15
1.23
1.31
1.40
1.48
1.57
1.66
1.75
1.84
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables for Joists and Rafters
36 Span Tables
TABL
E R
-24
RA
FTER
S WIT
H L
/180
DEF
LEC
TIO
N L
IMIT
S
DE
SIG
N C
RIT
ER
IA:
Stre
ngth
- L
ive
Load
of
50 p
sf p
lus
dead
loa
dof
20
psf
dete
rmin
es t
he r
equi
red
bend
ing
desi
gn v
alue
.D
efle
ctio
n -
For
50 p
sf l
ive
load
.Li
mite
d to
spa
n in
inc
hes
divi
ded
by 1
80.
Raf
ter
Ben
ding
Des
ign
Val
ue,
F b, (p
si)
Siz
eSp
acin
g(i
n)(i
n) 2
00 3
00 4
00 5
00 6
00 7
00 8
00 9
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
0024
0025
0026
0027
0028
0029
0030
00
12.0
2-
5 2
-11
3-
5 3
-10
4-
2 4
- 6
4-1
0 5
- 1
5-
5 5
- 8
5-1
1 6
- 2
6-
5 6
- 7
6-1
0 7
- 0
7-
3 7
- 5
7-
8 7
-10
8-
0 8
- 2
8-
4 8
- 6
8-
8 8
-10
9-
0 9
- 2
9-
416
.0 2
- 1
2-
7 2
-11
3-
4 3
- 7
3-1
1 4
- 2
4-
5 4
- 8
4-1
1 5
- 1
5-
4 5
- 6
5-
9 5
-11
6-
1 6
- 3
6-
5 6
- 7
6-
9 6
-11
7-
1 7
- 3
7-
5 7
- 6
7-
8 7
-10
8-
0 8
- 1
2x 4
19.2
1-1
1 2
- 4
2-
8 3
- 0
3-
4 3
- 7
3-1
0 4
- 1
4-
3 4
- 6
4-
8 4
-10
5-
1 5
- 3
5-
5 5
- 7
5-
9 5
-11
6-
0 6
- 2
6-
4 6
- 6
6-
7 6
- 9
6-1
1 7
- 0
7-
2 7
- 3
7-
524
.0 1
- 8
2-
1 2
- 5
2-
8 2
-11
3-
2 3
- 5
3-
7 3
-10
4-
0 4
- 2
4-
4 4
- 6
4-
8 4
-10
5-
0 5
- 1
5-
3 5
- 5
5-
6 5
- 8
5-
9 5
-11
6-
0 6
- 2
6-
3 6
- 5
6-
6 6
- 7
12.0
3-1
0 4
- 8
5-
4 6
- 0
6-
7 7
- 1
7-
7 8
- 1
8-
6 8
-11
9-
4 9
- 8
10-
010
- 5
10-
911
- 1
11-
511
- 8
12-
012
- 4
12-
712
-10
13-
213
- 5
13-
813
-11
14-
214
- 5
14-
816
.0 3
- 3
4-
0 4
- 8
5-
2 5
- 8
6-
2 6
- 7
7-
0 7
- 4
7-
8 8
- 1
8-
5 8
- 8
9-
0 9
- 4
9-
7 9
-10
10-
210
- 5
10-
810
-11
11-
211
- 5
11-
711
-10
12-
112
- 4
12-
612
- 9
2x 6
19.2
3-
0 3
- 8
4-
3 4
- 9
5-
2 5
- 7
6-
0 6
- 4
6-
9 7
- 0
7-
4 7
- 8
7-1
1 8
- 3
8-
6 8
- 9
9-
0 9
- 3
9-
6 9
- 9
9-1
110
- 2
10-
510
- 7
10-1
011
- 0
11-
311
- 5
11-
724
.0 2
- 8
3-
3 3
-10
4-
3 4
- 8
5-
0 5
- 4
5-
8 6
- 0
6-
4 6
- 7
6-1
0 7
- 1
7-
4 7
- 7
7-1
0 8
- 1
8-
3 8
- 6
8-
8 8
-11
9-
1 9
- 4
9-
6 9
- 8
9-1
010
- 0
10-
310
- 5
12.0
5-
0 6
- 2
7-
1 7
-11
8-
8 9
- 4
10-
010
- 7
11-
211
- 9
12-
312
- 9
13-
313
- 8
14-
214
- 7
15-
015
- 5
15-1
016
- 3
16-
717
- 0
17-
417
- 8
18-
018
- 5
18-
919
- 1
19-
516
.0 4
- 4
5-
4 6
- 2
6-1
0 7
- 6
8-
1 8
- 8
9-
2 9
- 8
10-
210
- 7
11-
111
- 6
11-1
012
- 3
12-
813
- 0
13-
413
- 8
14-
014
- 4
14-
815
- 0
15-
415
- 7
15-1
116
- 3
16-
616
- 9
2x 8
19.2
3-1
1 4
-10
5-
7 6
- 3
6-1
0 7
- 5
7-1
1 8
- 5
8-1
0 9
- 3
9-
810
- 1
10-
610
-10
11-
211
- 6
11-1
012
- 2
12-
612
-10
13-
113
- 5
13-
814
- 0
14-
314
- 6
14-1
015
- 1
15-
424
.0 3
- 6
4-
4 5
- 0
5-
7 6
- 2
6-
7 7
- 1
7-
6 7
-11
8-
4 8
- 8
9-
0 9
- 4
9-
810
- 0
10-
410
- 7
10-1
111
- 2
11-
611
- 9
12-
012
- 3
12-
612
- 9
13-
013
- 3
13-
613
- 8
12.0
6-
5 7
-10
9-
010
- 1
11-
111
-11
12-
913
- 6
14-
315
- 0
15-
816
- 3
16-1
117
- 6
18-
118
- 7
19-
219
- 8
20-
220
- 8
21-
221
- 8
22-
122
- 7
23-
023
- 5
23-1
124
- 4
24-
916
.0 5
- 6
6-
9 7
-10
8-
9 9
- 7
10-
411
- 1
11-
912
- 4
13-
013
- 6
14-
114
- 8
15-
215
- 8
16-
116
- 7
17-
017
- 6
17-1
118
- 4
18-
919
- 2
19-
719
-11
20-
420
- 8
21-
121
- 5
2x10
19.2
5-
1 6
- 2
7-
2 8
- 0
8-
9 9
- 5
10-
110
- 8
11-
311
-10
12-
412
-10
13-
413
-10
14-
314
- 9
15-
215
- 7
15-1
116
- 4
16-
917
- 1
17-
617
-10
18-
218
- 6
18-1
119
- 3
19-
724
.0 4
- 6
5-
6 6
- 5
7-
2 7
-10
8-
5 9
- 0
9-
710
- 1
10-
711
- 1
11-
611
-11
12-
412
- 9
13-
213
- 6
13-1
114
- 3
14-
815
- 0
15-
415
- 8
15-1
116
- 3
16-
716
-11
17-
217
- 6
E12
.00.
040.
080.
130.
180.
230.
290.
350.
420.
500.
570.
650.
740.
820.
911.
001.
101.
201.
301.
401.
511.
621.
731.
841.
962.
082.
202.
322.
452.
58E
16.0
0.04
0.07
0.11
0.15
0.20
0.25
0.31
0.37
0.43
0.50
0.56
0.64
0.71
0.79
0.87
0.95
1.04
1.12
1.21
1.31
1.40
1.50
1.60
1.70
1.80
1.91
2.01
2.12
2.23
E19
.20.
040.
060.
100.
140.
180.
230.
280.
330.
390.
450.
520.
580.
650.
720.
790.
870.
951.
031.
111.
191.
281.
371.
461.
551.
641.
741.
841.
942.
04E
24.0
0.03
0.06
0.09
0.12
0.16
0.21
0.25
0.30
0.35
0.40
0.46
0.52
0.58
0.64
0.71
0.78
0.85
0.92
0.99
1.07
1.14
1.22
1.30
1.39
1.47
1.56
1.64
1.73
1.82
Not
e:Th
e re
quire
d m
odul
us o
f el
astic
ity, E
, in
1,00
0,00
0 po
unds
per
squ
are
inch
is
show
n at
the
bot
tom
of
each
tab
le, i
s lim
ited
to 2
.6 m
illio
n ps
i an
d le
ss, a
nd i
s ap
plic
able
to
all
lum
ber
size
s sh
own.
Span
s ar
e sh
own
in f
eet-i
nche
s an
d ar
e lim
ited
to 2
6' a
nd l
ess.
Che
ck s
ourc
es o
f su
pply
for
ava
ilabi
lity
of l
umbe
r in
len
gths
gre
ater
tha
n 20
'.
Span Tables for Joists and Rafters
Commentary A-1
A.1 Floor Joists
A.1.1 Floor Joists with L/360 DeflectionLimitations
Tables F-1 through F-7 list spans for floor joists,used over a single span, with calculations based onmodulus of elasticity, E, and the required bendingdesign values, Fb, shown. Floor joist spans aredetermined based on a deflection limitation of L/360, where L is the span in inches. The deflectionequation for a simple span beam with uniformlydistributed load is:
5wL4
Δmax = [Eq. A.1-1]384EI
Since Δmax ≤ L/360 this equation can be rewrittento solve for L as follows:
384EIL = [Eq. A.1-2]
5w (360)
The uniform load, w, is based on the live loadand joist spacing. The moment of inertia, I, is basedon the joist size.
The required bending design value, Fb, is deter-mined based on the calculated span. Note that themaximum moment, Mmax, of a single span beam withuniform load is calculated as:
wL2
Mmax = [Eq. A.1-3] 8
where the uniform load, w, is based on the totaldead plus live load and joist spacing. The actualbending stress in a beam is calculated as fb = M/Swhere S is the section modulus of the joist. Theallowable bending design value, Fb, is based on afully supported member, properly sheathed andnailed on the top edge of the joist. Since the actual
stress must be less than the allowable bending designvalue, Fb, the allowable bending design value can becalculated as:
wL2
Fb = [Eq. A.1-4]8 S
A.1.2 Floor Joists with L/480 or L/600Deflection Limitations
Most codes require a minimum deflection limi-tation of L/360 for floor joists. In cases where astricter deflection limit is desired, and the lengthshown is controlled by the L/360 deflection limit, thetabulated span lengths may be adjusted by the factorsshown as follows:
Deflection Limit Adjustment FactorL/480 0.91L/600 0.84
A.1.3 Two-Span Floor Joists
Tables F-1 through F-7 list spans based on floorjoists with a uniform load over one span. Calcula-tions are based on E with required Fb values shown.Note that a uniform live load acting on equal spansof a continuous two-span joist will create lessdeflection and stress than an identical uniform loadacting on a single span joist. Therefore, Tables F-1through F-7 may conservatively be used for continu-ous, two-span joists supporting a uniform load. Notealso that the required compression design valueperpendicular to grain at the center support will betwice that required for a single span joist as shownin Table 9.1.
A.2 Ceiling Joists
Tables C-1 and C-2 list spans for ceiling joistsused over a single span with calculations based on Eand the required Fb values shown. The spans andrequired bending design values are determined fromthe same equations for a single span, uniformly
APPENDIX ACOMMENTARY
3
Span Tables for Joists and Rafters
A-2 Commentary
and required modulus of elasticity are the same asthose for single span beams with deflection limita-tions of L/240, except that 180 is substituted for 240in the numerator of Equation A.3.1-2. Generally, adeflection limitation of L/180 applies to rafterswithout a drywall ceiling attached to the underside.Some governing building codes also consider theslope of the rafter in determining deflection limita-tions, and only allow L/180 deflection limitations forrafters with slopes greater than 3 in 12 and no ceilingattached.
A.3.3 Roof Loads
Section 6 outlines adjustment factors for deter-mining rafter spans and required E values for rooflive loads of 12 psf or 16 psf. The tabulated spansare modified by the square root of the ratio of thetotal uniform load at 20 psf and the total uniform loadat the reduced level (12 or 16 psf). This is based onEquation A.3.1-1 which is used to calculate the spanof a rafter based on the square root of the totaluniform load.
The E values are adjusted based on the modifiedspan as noted above and the uniform live load ratio.Based on Equation A.3.1-2:
E2 w2 L2 = [Eq. A.3.3-1]
E1 w1 L1
LL2 LL1+DL1 = [Eq. A.3.3-2]
LL1 LL2+DL2
where subscript 1 denotes variables associatedwith the 20 psf uniform live load and subscript 2denotes variables associated with the uniform live loadat the reduced level. LL is the uniform live load andDL is the uniform dead load. All other variables areas previously defined in A.3.
A.4 Compression Perpendicular to GrainDesign Requirements
Compression perpendicular to grain is also adesign consideration for joists and rafters. Requiredcompression perpendicular to grain design values
loaded beam as shown above for single span floorjoists. The only difference in design criteria is L/240deflection limitations for ceiling joists supportingdrywall ceilings which are typically required bybuilding codes. The allowable bending designvalue, Fb, is based on a fully supported member,properly sheathed and nailed on one edge of the joist.
A.3 Rafters
A.3.1 Rafters with L/240 Deflection Limitations
Tables R-1 through R-12 list spans for rafterswith deflection limitations of L/240, used over asingle span with calculations based on Fb values andthe required E values shown. The allowable bendingdesign value, Fb, is based on a fully supportedmember, properly sheathed and nailed on the topedge of the rafter. Generally, a deflection limitationof L/240 applies to rafters with a drywall ceilingattached to the underside (e.g., cathedral ceilings).
The maximum moment for a single span beamwith a uniform load is defined above. This equationcan be rewritten to solve for L as follows:
8 Fb SL = [Eq. A.3.1-1]
w
The uniform load, w, is based on the total deadplus live load and joist spacing.
The required modulus of elasticity, E, is deter-mined based on this calculated span as follows:
5wL3 (240)E = [Eq. A.3.1-2]
384 I
The uniform load, w, is based on the live loadand joist spacing.
A.3.2 Rafters with L/180 Deflection Limitations
Tables R-13 through R-24 list spans for rafterswith deflection limitations of L/180, used over asingle span with calculations based on Fb values andthe required E values shown. Calculations for span
( )3
( ) ( )3/2
)(
Span Tables for Joists and Rafters
Commentary A-3
are tabulated in Table 9.1. These values are calcu-lated assuming a bearing width of 1.5", a total load of66.67 plf, and the calculated span. The 66.67 plf totalload is based on a 40 psf live load and 10 psf dead loadon joists at 16" on center, which is a typical conditionof use. Alternate Fc⊥ values are possible by adjustingthe tabulated values in direct proportion to the desiredload. Adjustment factors for various loads andspacings are tabulated in Table 9.2 for convenience.Required compression design values perpendicular tograin are also applicable to bearing plates.
A.5 Lumber Design Values
The spans for nominal 2x5 joists or rafters are 82percent of the spans tabulated for the same spacing ofnominal 2x6 joists or rafters. For each joist or rafterspacing, the values of E for 2x5’s are the same as thetabulated E values for 2x6’s. The values of Fb for2x5's shall be determined by multiplying the tabulatedFb values for 2x6's by 1.077.
A.6 Load Requirements
Applicable design criteria for each condition ofuse appear at the top of each table. While thesecriteria are directed principally to residential construc-tion they are suitable for other occupancies havingsimilar conditions of loading. Examples include, butare not limited to, assembly areas with fixed seats,cornices, fire escapes for single family residentialbuildings, cell blocks of penal institutions, multiplefamily dwelling units and hotel guest rooms. Checkgoverning building code requirements for other appli-cable occupancies. Tabulated spans for rafters alsoapply to other types of occupancy, since the occu-pancy has little bearing on roof loading.
The live and dead load requirements are based onvarious common loading conditions. The followingtables (Tables A-1, A-2, A-3 and A-4) are intended toprovide guidance regarding the type of material oroccupancy that might create the loads in each spantable. Tables A-1, A-2, A-3 and A-4 are intended asa guide only and are superseded by the governingbuilding code in the applicable jurisdiction.
A.7 Support Requirements
Adequate support shall be provided for all joistsand rafters. Ridge beams shall be installed at roofpeaks, and rafters shall bear directly on the ridge beamor be supported by hangers or framing anchors.Ceiling joists shall not be required when properlydesigned ridge beams are used.
A ridge board shall be permitted to be substitutedfor a ridge beam when the roof slope equals orexceeds 3 in 12, except that ridge beams shall berequired for cathedral ceilings. Ridge boards shall beat least 1 inch nominal in thickness and not less than thedepth of the cut end of the rafter. Rafters shall beplaced directly opposite each other, and ceiling joistsshall be installed parallel with rafters to provide acontinuous tie between exterior walls.
A.8 Repetitive Member Use
Repetitive member use is that condition whereframing members such as joists, rafters, studs, planks,decking or similar members are in contact or spacednot more than 24 inches on-center, are not less than 3in number and are joined by floor, roof or other load-distributing elements adequate to support the designload. Bending design values (Fb) for such use are 15percent greater than for single-member use. TablesW-1 and W-2 of Design Values for Joists andRafters, a supplement to these tables, provide bendingdesign values for repetitive member use of joists andrafters.
A.9 Load Duration
For joists and rafters, bending design values (Fb)are adjusted for load duration by the following factors:
1.00 for 10 years (normal) duration, as for occu-pancy live load,
1.15 for 2 months duration, as for snow,
1.25 for 7 days duration, as for constructionloading.
Span Tables for Joists and Rafters
A-4 Commentary
Table A-1. FLOOR JOISTS WITH L/360 DEFLECTION LIMITATIONS
Table Live Dead1
No. Load Load Material or Occupancy(psf) (psf)
F-1 30 10 All rooms used for sleeping areas and attic floorsF-2 40 10 Decks and all rooms except those used for sleeping areas and
attic floorsF-3 50 10 Office space (concentrated load checks may be required)F-4 60 10 Decks or corridors
F-5 40 20 All rooms, except those used for sleeping areas and attic floors,with 1.5" or less lightweight concrete floor fill
F-6 50 20 Office space (concentrated load checks may be required) with 1.5"or less lightweight concrete floor fill
F-7 60 20 Decks or corridors with 1.5" or less lightweight concrete floor fill
Tables W-1 and W-2 of Design Values for Joistsand Rafters, a supplement to these tables, providebending design values for repetitive member use ofjoists and rafters under 10 years (normal), 2 monthsand 7 days load duration.
A.10 Use of the Span Tables
Spans for floor and ceiling joists are calculated onthe basis of the modulus of elasticity (E) with therequired bending design value (Fb) listed below eachspan. Spans for rafters are calculated on the basis ofbending design values (Fb) with the required modulusof elasticity (E) listed below each span. Requiredcompression perpendicular to grain design values
(Fc⊥) are tabulated based on span and bearing lengthwith adjustments for different loading and on-centerspacings. Use of the tables is illustrated in theexamples which follow. Values determined from thespan tables should be compared to values from TablesW-1 and W-2 of Design Values for Joists andRafters. Species and grades with design valuesgreater than or equal to those shown in the span tablesare appropriate.
Example 1. Floor Joists. Assume a requiredsingle span of 12'-9", a live load of 40 psf, dead loadof 10 psf and joists spaced 16 inches on centers.Table F-2 shows that a grade of 2x8 having an Evalue of 1,600,000 psi and an Fb value of 1255 psi
1. Dead load includes the weight of the framing members.
Table A-2. CEILING JOISTS WITH L/240 DEFLECTION LIMITATIONS
Table Live Dead1
No. Load Load Material or Occupancy(psf) (psf)
C-1 10 5 Drywall ceiling attached, no attic storageC-2 20 10 Drywall ceiling attached, limited attic storage where development
of future rooms is not possible
1. Dead load includes the weight of the framing members.
Span Tables for Joists and Rafters
Commentary A-5
Table A-3. RAFTERS WITH L/240 DEFLECTION LIMITATIONS (Drywall ceiling attached to underside of rafter)
Table Live Dead1
No. Load Load Material or Occupancy(psf) (psf)
R-1 20 10 Light roof (1 course of asphalt shingles)R-2 30 10 Light roof (1 course of asphalt shingles)R-3 40 10 Light roof (1 course of asphalt shingles)R-4 50 10 Light roof (1 course of asphalt shingles)
R-5 20 15 Medium roof covering (up to 2 courses of asphalt shingles, or wood shakes/shingles)R-6 30 15 Medium roof covering (up to 2 courses of asphalt shingles, or wood shakes/shingles)R-7 40 15 Medium roof covering (up to 2 courses of asphalt shingles, or wood shakes/shingles)R-8 50 15 Medium roof covering (up to 2 courses of asphalt shingles, or wood shakes/shingles)
R-9 20 20 Heavy roof covering (2" clay book tile)R-10 30 20 Heavy roof covering (2" clay book tile)R-11 40 20 Heavy roof covering (2" clay book tile)R-12 50 20 Heavy roof covering (2" clay book tile)
Table A-4. RAFTERS WITH L/180 DEFLECTION LIMITATIONS (No drywall ceiling attached to underside of rafter)
Table Live Dead1
No. Load Load Material or Occupancy(psf) (psf)
R-13 20 10 Light roof (up to 2 courses of asphalt shingles, or wood shakes/shingles)R-14 30 10 Light roof (up to 2 courses of asphalt shingles, or wood shakes/shingles)R-15 40 10 Light roof (up to 2 courses of asphalt shingles, or wood shakes/shingles)R-16 50 10 Light roof (up to 2 courses of asphalt shingles, or wood shakes/shingles)
R-17 20 15 Medium roof covering (up to 1/4" slate)R-18 30 15 Medium roof covering (up to 1/4" slate)R-19 40 15 Medium roof covering (up to 1/4" slate)R-20 50 15 Medium roof covering (up to 1/4" slate)
R-21 20 20 Heavy roof covering (2" clay book tile)R-22 30 20 Heavy roof covering (2" clay book tile)R-23 40 20 Heavy roof covering (2" clay book tile)R-24 50 20 Heavy roof covering (2" clay book tile)
1. Dead load includes the weight of the framing members, wood structural panels, gypsum, and insulation.
1. Dead load includes the weight of the framing members, and wood structural panels.
Span Tables for Joists and Rafters
A-6 Commentary
would have a span of 12'-10", which satisfies thecondition. Assuming a 2" bearing length, Table 9.1shows 156 psi for Fc⊥ at a 14' span. Table 9.2shows an adjustment factor of 1.0. The grade of2x8 would also need an Fc⊥ value greater than 156psi.
Example 2. Rafters. Assume a horizontal pro-jection span of 13'-0", a live load of 20 psf, deadload of 10 psf, L/240 deflection limitation andrafters spaced 16 inches on centers. Table R-1shows that a 2x6 having an Fb value of 1400 psiand an E value of 1,350,000 psi would have a spanof 13'-3" of horizontal projection. Conversion ofhorizontal to sloping distance is illustrated on pageA-7. Table 9.1 shows a required Fc⊥ value of 89psi assuming a 3.5" bearing length. Table 9.2allows that to be adjusted by a factor of 0.60,which equals 53 psi. The grade of 2x6 would needan Fc⊥ value greater than 53 psi.
Example 3. Two-span Floor Joists. Assumetwo floor systems are required to span 12' roomson either side of a 6' corridor. The rooms require
a 40 psf live load and the corridor requires an 80psf live load. All spans require a 10 psf dead load.Table F-2 shows a 2x12 at 16" on-center withE=1,200,000 psi and Fb=1036 psi will span 18'-1".By overlapping these joists across the corridor, asshown in Figure A.10-1, a spacing of 8" on-centerwill be achieved on the corridor, which effectivelycarries twice the live load. This provides ad-equate support for the required 80 psf live loadacross the corridor. Table 9.1 shows a requiredFc⊥ value of 114 psi assuming a 3.5" bearinglength. Doubling this value in accordance withA.1.3 gives 228. Table 9.2 shows an adjustmentfactor of 1.0. The grade of 2x12 would need anFc⊥ value greater than 228 psi.
Since many combinations of size, spacing, E, Fband Fc⊥ values are possible, the user should examinethe tables to determine which combination fits theparticular case most effectively.
16"
12'6'12'
8"
Figure A.10-1 Two-span floor joists overlap at interior span todouble load-carrying capacity of the floor systemfor the corridor.
Span Tables for Joists and Rafters
Commentary A-7
CONVERSION DIAGRAMFOR RAFTERS
3
4
5
6
7
8
9
10
1112
1314
1516
17181920
Slope (x in 12)
Length of Horizontal Projection (feet)0 2 4 6 8 10 12 14 16 18 20 22 24 26
24
22
20
16
14
12
10
28
26
8
Length of HorizontalProjection
Member Length
Member Length (feet) 18
To use the diagram, select the known horizon-tal distance and follow the vertical line to its intersec-tion with the radial line of the specified slope, thenproceed along the arc to read the sloping distance.Interpolation is appropriate between the one footincrements. The diagram also gives the horizontaldistance corresponding to a given sloping distance or
the slope when the horizontal and sloping distances areknown.
Example: With a roof slope of 8 in 12 and ahorizontal distance of 20 feet the sloping distance isread as 24 feet.
Span Tables for Joists and Rafters
A-8 Commentary
-NOTES-
American Forest & Paper AssociationAmerican Wood Council
1111 - 19th Street, NW, Suite 800Washington, D.C. 20036
