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DESIGN OF STIFFENERS FOR HOT AIR DU

TITLE : HOT AIR DUCT

SECTION PROPERTY WITH PLATE

Widt! S

% D & A' cm

AT AH DISCHARGE:

1 HAD MC)* 160 155 75 9.0 5.7 29.30 1137.47 273.67 193.32 118.29 3.06 2.03

2 HAD+ MC*,) 160 80 40 7.5 4.8 17.10 146.8 183.57 61.71 26.11 3.28 2.83

3 HAD- M&+)* 160 255 125 12.5 6.9 55.50 6243.21 505.67 559.32 435.44 3.02 2.83

4 HADS+ MC+) 160 130 65 8.2 5.3 24.70 653.69 231.77 140.74 78.24 3.06 2.15

5 HADT. M&+)* 160 255 125 12.5 6.9 55.50 6243.21 505.67 559.32 435.44 3.02 2.95

6 HADS. MC+) 160 130 65 8.2 5.3 24.70 653.7 231.77 140.74 78.24 3.06 2.15

7 HADS- MC+) 160 130 65 8.2 5.3 24.70 653.7 231.77 140.74 78.24 3.06 2.15

SlN/

Sti001M2d

R/lledSe#ti/n

%it! "late

Plate%idt!(33

de"t!/0 4n1%it!"late(33

T!2 /00lan$e(33

T!21 /0%e5(33

T/talArea %it!"l (#3+

M/3ent /0 inertia /0#/351se#ti/n (#3-

M/duli /0 se#ti/n(#3.

ryy

Ma6"/s1 "r

T0

t%

I66 COM&

IyyCOM&

766y

766y+ Kn/m

2

PLATE 5 T

SELECT DUCT

PLATE 6 T

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ained

Rati/ Result Result

mm L/320

116.79 *18 PASS 2.83 PASS

116.79 *1* PASS 0.40 PASS

116.79 *1.- PASS 10.49 PASS

109.76 *1+ PASS 1.01 PASS

109.76 *1*, PASS 0.60 PASS

109.76 *1*) PASS 0.28 PASS

109.76 *1+* PASS 3.30 PASS

All15endin$stress

05

A#tualde0ln

N/mm2

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DESIGN OF STIFFENERS FOR HOT

COMPRESSION ON O9TSIDE

Sl N/1 S"a#in$ S"an Inter3ediate 0a#t/r 0/r #al#ulatin$ "er3issi5le stress (a

m m Kn/m Knm m Y k2 C2 C1

AT AH DISCHARGE:

1 3.81 1.25 3.70 4.76 8.150 2.500 81.80 396.02 17.22 0.14 -0.730 9.62 5.88

2 4.61 1.25 1.25 5.76 1.125 1.250 38.15 1820.64 10.67 0.02 -1.000 5.62 2.38

3 4.61 1.75 6.65 8.07 35.677 1.250 41.41 1545.24 20.40 0.35 -0.295 14.34 11.16

4 3.40 1.60 2.30 5.44 2.878 2.300 75.08 470.05 15.85 0.09 -0.820 8.36 4.64

5 4.20 1.20 3.53 5.04 6.280 1.500 49.69 1073.09 20.40 0.35 -0.295 14.34 11.16

6 3.40 1.20 1.80 4.08 1.322 1.800 58.76 767.46 15.85 0.09 -0.820 8.36 4.64

7 3.40 1.40 3.20 4.76 4.874 3.200 104.47 242.83 15.85 0.09 -0.820 8.36 4.64

Ma6ne$1 "r

udl /n5ea3

&endin$M/3ent

E00 Len$t!L

ey

Slenderness rati/

Kn/m2 Ley=ryy D/T =C/

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Rati/ Result Result

mm L/320

68.90 *1,) PASS 5.309 PASS

43.10 *1-* PASS 0.648 PASS

81.93 *1,- PASS 17.096 PASS

36.78 *1- PASS 1.593 PASS

14.42 *1- PASS 0.857 PASS

16.90 *1< PASS 0.448 PASS

62.30 *1,) PASS 5.223 PASS

A#tual1stress in5endin$ (M

77 in

(H/t

A#tualde0ln

N/mm2

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SECTIONAL PROPERTIES OF SECTIONS AS PER IS 808:198

I-SECTIONS

Member Mass Dep! "# $%&! "# T!' "# T!' "# M.( M.( ) "# ) "# E.M

S*.," s%-e per mere se%"/ se%"/ $eb *a/e r/ r/

D B t T Ixx Iyy

'm mm mm mm mm m4 m4 m m m3

1 MB100 8.9 100 50 4.7 7 183.00 12.90 4.00 1.05 36.60

2 MB12 13.3 125 70 5 8 445.00 38.50 5.16 1.51 71.20

3 MB10 15 150 75 5 8 718.00 46.80 6.13 1.57 95.70

4 MB1! 19.6 175 85 5.8 9 1260.00 76.70 7.13 1.76 144.0

5 MB200 24.2 200 100 5.7 10 2120.00 137.00 8.29 2.11 212.0

6 MB20 37.3 250 125 6.9 12.5 5130.00 335.00 10.40 2.65 410.0

7 MB"00 46 300 140 7.7 13.1 8990.00 486.00 12.40 2.86 599.0

8 MC0! 7.14 75 40 4.8 7.5 78.50 12.90 2.94 1.19 20.90

9 MC100 9.56 100 50 5 7.7 192.00 26.70 3.97 1.48 33.50

10 MC12 13.1 125 65 5.3 8.2 425.00 61.10 5.05 1.91 68.10

11 MC10 16.8 150 75 5.7 9 788.00 103.00 6.08 2.20 105.0

12 MC1! 19.6 175 75 6 10.2 1240.00 122.00 7.04 2.21 141.0

13 MC200 22.3 200 75 6.2 11.4 1830.00 141.00 8.02 2.22 181.0

14 MC22 26.1 225 80 6.5 12.4 2710.00 188.00 9.02 2.37 241.0

15 MC20 30.6 250 80 7.2 14.1 3880.00 211.00 9.92 2.37 307.0

#xx

#yy

$xx

PLATE 5 THK

DUCT

PLATE 6 THK

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m4 m3 m3 m3 m

183.567 93.773 43.648 22.946 3.0761

209.167 144.54 81.033 26.146 2.8925

217.467 185.01 107.97 27.183 2.8328

247.367 247.74 160.18 30.921 2.7379

307.667 332.36 230.11 38.458 2.8159

505.667 559.32 435.44 63.208 3.0185

656.667 777.51 631.37 82.083 3.14183.567 61.709 26.112 22.946 3.2764

197.367 95.107 45.957 24.671 3.1258

231.767 140.74 78.237 28.971 3.0632

273.667 193.32 118.29 34.208 3.0562

292.667 245.07 158.21 36.583 2.9826

311.667 301.26 203.03 38.958 2.9221

358.667 374.19 264.38 44.833 2.9469

381.667 457.93 338.05 47.708 2.8497

IyyC%&

$xxy1

$xxy2

$yy

#yy

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(%)*+', M%).), %# C#%* L% A..%y St33., St#3,, R3)4t5%* F4t%# %# EN 10

%# ),3 % BS669 BS90 7 3.3

50 206000 50 1

100 206000 100 0.94

200 198000 150 0.88

300 191000 200 0.84

400 183000 250 0.76

500 174000 300 0.67

600 165000 350 0.64

400 0.61

T3&3#t)#3%

C

M%).), %E.,t545ty :

;E; M

T3&3#t)#3 %CR3)4t5%*

4t%# t

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02-S2!

t3 t3&

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'20 1

0.1 0.8

0.2 0.6

0.3 0.4

0.4 0.2

0.5 0

0.6 0.1

0.7 0.2

0.8 0.3

0.9 0.4

1 0.5

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06272016Prepare&bS

)EA322304958.*s

I*t3#*t5%*. D33.%&3*t *PRO>ECT

+"&a:ar% S

E*+5*33#5*+ A,,%45t3, L5&5t3DOCNO

CALCULATION OF COMBINED SECTIONAL PROPERTIES OF I-SECTION ?ITH PLATE

SECTION PROPERTIES OF ISMB200

Dep! "#

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06272016Prepare&bS

)EA322304958.*s

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06272016Prepare&bS

)EA322304958.*s

;arsINITIALS

S

PAGE

(SECT(G, $(TH PLATE

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06272016Prepare&bS

)EA322304958.*s

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I*t3#*t5%*. D33.%&3*t *PRO>ECT

E*+5*33#5*+ A,,%45t3, L5&5t3DOCNO

T(PICAL DESIGN CALCULATION FOR DUCT STIFFENERS AS PER IS 800-1986

COMBINED SECTION PROPERTIES OF ISMC! ?ITH PLATE-= TH@

Dep! "# ";/s M"&;*;sE ,mm2 202800

A**.be/&%/ sress #b,mm2165B0.828 136.62

)es;*A;a* be/&%/ sressA**.be/&%/ sress PASS

C!e' #"r De=e%"/

3.54

A**.&e=e%"/L325 12.31

)es;*A;a* De=A**.De= PASS

("mb

1

2

*210

A;a* &e#5*4384E(

IDEA

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I*t3#*t5%*. D33.%&3*t *PRO>ECT

E*+5*33#5*+ A,,%45t3, L5&5t3DOCNO

IDEA

CHEC@ FOR STIFFENER ?ITH COMPRESSION ON

OUTSIDE FLANGE UNRESTRAINED

Ma.,ea%:e press;re 3.5

Spa%/ 1.5 m

Spa/ "# s%Ie/er 4 m

;&* "/ beam 5B1.5 5.25 K/m

Je/&%/ M"me/

5.25B4210 8.4 K/m

A;a* be/&%/ sress M2

9.6B106230.11B103 36.5

Des%/ Tempera;re ?P (D@ 140

Sress re&;%"/ #a"r ?as per s!ee e/* @ 0.828

)e&.>";/s M"&;*;sE ,mm2 202800

EIe%:e *e/!Le 2 m

S*e/&er/ess ra%"Ler 71.024

I*t3#&35t3 4t%# %# 4.4).t5*+ A..,t#3,, ,3# 4. =2" % PASS

>26.5B105?Ler@2 525.33

20.5

0.25

K2"eI as per Tab*e6.4 "# (S800 0.506

C2+reaer &%sa/e #r"m !e

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I*t3#*t5%*. D33.%&3*t *PRO>ECT

E*+5*33#5*+ A,,%45t3, L5&5t3DOCNO

IDEA

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mm

mm

mm

mm

mm

m

m

m

m

mK/m

K/m

mm

mm

m2

m4

m3

m3

K/m2

,mm2

"C

,mm2

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