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GlobalFloor®. Cofraplus 60 Safe load tables
Cofraplus 60. Safe load tables
ApplicationsCofraplus 60 profiled steel sheeting is designedfor the construction of reinforced concreteintermediate floors, terraces and flat roofs in all kindsof building structures, wherever static loads (office blocks, public buildings, high-rise structures)or low dynamic loads (multi-storey car parks, warehouses with forklift traffic etc.) are expected.
MaterialCofraplus 60 sheets are profiled using the technology of continuous roll forming of flat steel sheet S 350 GD, specified to PN-EN 10326:2006 and zinc-plated on both sides with zinc coat thickness of 275 g/m2 (C1 and C2 corrosive environment). From the face side the profiled sheet may be additionally protected with an organiccoating system offered by ArcelorMittal Construction.
Formwork At the construction stage, Cofraplus profiled sheets form a non-dismountable flooring formwork, fastened to fixed props and shored, if required. Individual sheetsare stitched lengthwise. Thanks to their light weightof 8.53 kg/m2, the profiles can be manually handleddespite the dimensions. The formwork sheeting mustbe continuous at bays and any edge trims mustbe supported on fixed props. The maximum lengthof a single profile should not exceed 15 m dueto restricted handling and manipulation possibilitieson a building site.
Varnished side
Cofraplus 60corrugated sheetfor composite floors
Cofraplus 60. Safe load tables
ReinforcementAt the composite stage, Cofraplus 60 – because of its specific characteristics, the mechanical constraints formed between the sheet and concrete resulting from the forces caused by surface friction and ribs – is regardedas a combined (composite) system which partiallyor completely substitutes the bottom span reinforcement of a floor slab. The cross-section of the reinforcement used in Cofraplus 60 sheeting ranges from 10.29 cm2/lm to 17.57 cm2/lm, depending on the gauge of the material. The total thickness of the floor slab ranges from 11 cm to 28 cm.When designing continuous reinforced slabs it is necessary to fill the floor slab with rebars working towards negative moment at the support. Considering concrete shrinkage,it is recommended to use anti-crack reinforcement mesh of at least 80 mm2/m in both directions.
Approval and StandardsThe design of a Cofraplus 60 composite reinforcedconcrete slab, its dimensioning for the construction stage and composite stage and the design assumptions fromthe point of view of fire resistance are exclusively based on the guidelines and methods stated in:PN EN 1994-1-1: 2008PN EN 1994-1-2: 2008PN EN 1993-1-3: 2008The key parameters required to predict the delamination resistance and the characteristic values for the designof a floor slab with regard to its fire resistance have been determined and verified at the Polish Building Research Institute (ITB) and published in the Technical ApprovalNo. AT-15-6138/2009.
Technical parameters
hp
bo
bs
br
bb
hp/2
Cofraplus 60 geometrical data
bs [cm] bb [cm] bo [cm] br [cm] hp [cm]
20,7 6,2 8,15 10,6 5,8
Nominal sheet gauge ts mm 0,75 0,88 1,00 1,25
Payload gs kg/ m2 8,53 10,00 11,37 14,22
Effective cross-section of the steel Ap cm2/m 10,29 12,17 13,91 17,57
Cross-section M.I. Ip cm4/m 55,12 65,21 74,53 93,94
Neutral axis position e cm 3,33 3,33 3,33 3,33
Performance characteristics
Floor sheet geometrical data
Cofraplus 60. Safe load tables
L
fmax < L /180L
fmax < L /250L L
d=100L L L
d=100
Grubość blachy stropowej [mm]
0,75 0,88 1,00 1,25 0,75 0,88 1,00 1,25 0,75 0,88 1,00 1,25 0,75 0,88 1,00 1,25
Grubość płyty stropowej [cm]
L [m] L [m] L [m] L [m]
11 2,78 2,93 3,06 3,29 2,60 2,74 2,84 3,00 2,65 3,11 3,48 3,75 2,97 3,34 3,69 4,05
12 2,68 2,83 2,95 3,17 2,50 2,63 2,75 2,96 2,51 2,96 3,31 3,71 2,82 3,20 3,53 3,82
13 2,60 2,74 2,86 3,08 2,41 2,54 2,65 2,86 2,39 2,82 3,16 3,54 2,68 3,16 3,39 3,76
14 2,57 2,68 2,78 2,99 2,33 2,46 2,57 2,77 2,28 2,70 3,03 3,39 2,56 3,03 3,26 3,63
15 2,51 2,65 2,75 2,91 2,26 2,39 2,49 2,69 2,18 2,59 2,91 3,26 2,45 2,90 3,24 3,50
16 2,44 2,58 2,70 2,90 2,20 2,32 2,43 2,62 2,10 2,49 2,80 3,14 2,36 2,79 3,14 3,42
18 2,32 2,46 2,57 2,77 2,09 2,21 2,31 2,49 1,94 2,31 2,61 2,92 2,18 2,60 2,92 3,28
20 2,22 2,35 2,46 2,66 2,00 2,12 2,21 2,39 1,82 2,16 2,44 2,74 2,04 2,43 2,74 3,08
24 2,07 2,19 2,29 2,48 1,86 1,97 2,06 2,23 1,61 1,93 2,18 2,45 1,81 2,17 2,45 2,76
28 1,95 2,06 2,15 2,33 1,75 1,86 1,94 2,10 1,45 1,75 1,98 2,23 1,63 1,96 2,23 2,50
Load-bearing capacity of the floor sheeting has been determined on the assumed flexural capacityas per PN EN 1993-1-3.For a single-span system the load-bearing capacity has been determined for the deflection limit of L/180 and L/250.The intermediate prop width for a multi-span system is 100 mm.The table may be used in arrangements where shoring is applied. For systems where shoring of the sheetis not expected at the construction stage it is possible to extend the actual span (following and based on an analysis provided by the Technical Department of ArcelorMittal Construction ) to take advantage of the load-bearing capacity of the sheet used, with due consideration of the yield of the cross-section when the ULS is assessed for intermediate propped multi-span arrangements.
Table of allowed spans for the construction stage of Cofraplus 60
Floor sheetthickness cm 11 12 13 14 15 16 18 20 24 28
Concreteconsumption m
3/m2 0,075 0,085 0,095 0,105 0,115 0,125 0,145 0,165 0,205 0,245
Floor slabtheoretical
weight*kN/m2 1,87 2,12 2,375 2,62 2,87 3,12 3,62 4,12 5,12 6,12
*In order to determine the total weight of the slab the weight of concrete, the deflection and the weight of the sheet profile must be taken into account. 25 kN/m3 is the concrete specific gravity assumption.
Nominal concrete consumption
Cofraplus 60. Safe load tables
Composite floor slab performance characteristics
Non-insulated floor slabs of at least 11 cm, constructed using Cofraplus 60 profiles, without extra reinforcement in bays have the fire endurance rating of min. REI 30. The minimum thicknesses of floor slabs which guarantee that the fireproof insulation requirements are met are shown in the table.A proper design of additional reinforcement developedon the basis PN EN 1994-1-2, Appendix D and applied
in a special casing to the wave sections of the slab ensures a fire stop rating which exceeds REI 30. The approachto dimensioning and essential characteristics have been included in AT-15-6138/2009. Further details can also be obtained from the Technical Departmentof ArcelorMittal.
h [cm]COFRAPLUS 60; 0,75mm COFRAPLUS 60; 0,88mm COFRAPLUS 60; 1,00mm
Mpl,Rd [kNm/m]
VvRd [kN/m]
I [cm4/m]
Mpl,Rd [kNm/m]
VvRd [kN/m]
I [cm4/m]
Mpl,Rd [kNm/m]
VvRd [kN/m]
I [cm4/m]
11 23,05 23,97 491 26,27 25,32 525 28,98 26,57 554
12 26,65 25,95 632 30,53 27,30 675 33,85 28,54 712
13 30,25 27,91 799 34,79 29,25 852 38,71 30,48 899
14 33,85 29,84 993 39,05 31,17 1059 43,58 32,40 1116
15 37,45 31,75 1217 43,31 33,06 1297 48,45 34,28 1367
16 41,05 33,62 1473 47,57 34,93 1568 53,32 36,14 1651
18 48,26 37,28 2087 56,08 38,57 2218 63,06 39,77 2334
20 55,46 40,83 2850 64,60 42,11 3024 72,79 43,29 3178
22 62,66 44,27 3777 73,12 45,53 4003 82,53 46,69 4201
24 69,87 47,59 4885 81,64 48,83 5168 92,27 49,98 5418
28 84,27 53,90 7702 98,68 55,10 8122 111,74 56,21 8494
Fire resistance
REI 30 60 90 120 180
Thickness [cm] 11 12 14 16 19
Acoustic insulation
Floor acoustic characteristics without a suspended ceiling depend on floor slab weight and are compliant with:
Floor slab thickness 11 12 13 14 15 20 24 28
Acoustic insulation Rw (C:Ctr) dB(A)
45 (-1;-4) 46(-1;-4) 47(-1;-4) 48(-1;-5) 48(-1;-4) 52(-2;-6) 54(-1;-7) 56(-1;-7)
Cofraplus 60. Safe load tables
Load bearing capacity of the floor and delamination
According to PN EN 1994-1-1, the load-bearing capacity of the floor beam as far as the delamination of sheeting is concerned is verified using one of the following two equivalent methods: the evaluation of m-k values and the partial composition method. The parameters required to check this aspect of load-bearing capacity have been determined during laboratory strength tests carried out at
the Building Research Institute, using methods compliant with PN-EN-1994-1-1 appendix B.3.
m MPa k MPa TRd MPa
92,50 0,056 0,10
Span lenghts of the support structure [mm]Qk
[kN/m2]1500 2000 2500 3000 3500 4000 4500 5000 5500 6000
1,5 110
Q131 110
Q131 110
Q131 111
Q131 111
Q131 122
Q131 142
Q131 163
Q188 183
Q188 184
Q221
12 Ø620
12 Ø620
12 Ø620
12 Ø840
12 Ø830
12 Ø840
14 Ø1030
16 Ø1030
18 Ø1040
20 Ø1230
2,5 110
Q131 110
Q131 110
Q131 111
Q131 111
Q131 132
Q131 152
Q131 173
Q188 193
Q188
12 Ø620
12 Ø620
12 Ø630
12 Ø830
12 Ø840
13 Ø1030
15 Ø1030
17 Ø1040
19 Ø1230
3,5 110
Q131 110
Q131 110
Q131 111
Q131 121
Q131 142
Q131 162
Q188 213
Q221
12 Ø620
12 Ø620
12 Ø640
12 Ø830
12 Ø1030
14 Ø1030
16 Ø1040
21 Ø1040
4,5 110
Q131 110
Q131 110
Q131 111
Q131 131
Q131 152
Q131 192
Q188
12 Ø620
12 Ø630
12 Ø830
12 Ø840
13 Ø1030
15 Ø1030
19 Ø1040
6,0 110
Q131 110
Q131 110
Q131 111
Q131 142
Q131 202
Q221
12 Ø620
12 Ø630
12 Ø830
12 Ø1030
14 Ø1030
20 Ø1030
8,0 110
Q131 110
Q131 110
Q131 131
Q131 202
Q221
12 Ø620
12 Ø630
12 Ø840
13 Ø1030
20 Ø1030
Safe load tables (composite stage)
Continuous floor slab – single-span
Cofraplus 60. Safe load tables
Continuous floor slab – double-span
Span lenghts of the support structure [mm]
L2/3
L2
L1/3
L1
Qk[kN/m2]
1500 2000 2500 3000 3500 4000 4500 5000 5500 6000
1,5 110
Q131Ø613
110
Q131Ø613
111
Q131Ø613
111
Q131Ø613
111
Q131Ø611
122
Q131Ø69
132
Q131Ø813
152
Q131Ø811
163
Q188Ø89
183
Q188Ø1013
12 Ø620
12 Ø620
12 Ø620
12 Ø620
12 Ø630
12 Ø830
13 Ø830
15 Ø830
16 Ø840
18 Ø1030
2,5 110
Q131Ø613
110
Q131Ø613
111
Q131Ø613
111
Q131Ø612
111
Q131Ø68
122
Q131Ø812
132
Q131Ø1015
152
Q131Ø65
163
Q188Ø1216
183
Q188Ø1010
12 Ø620
12 Ø620
12 Ø620
12 Ø630
12 Ø830
12 Ø830
13 Ø840
15 Ø840
16 Ø1030
18 Ø1030
3,5 110
Q131Ø613
110
Q131Ø613
111
Q131Ø613
111
Q131Ø69
111
Q131Ø811
122
Q131Ø89
132
Q131Ø1011
152
Q131Ø1215
163
Q188Ø109
214
Q221Ø1214
12 Ø620
12 Ø620
12 Ø620
12 Ø640
12 Ø830
12 Ø840
13 Ø1030
15 Ø1030
16 Ø1040
21 Ø1040
4,5 110
Q131Ø613
110
Q131Ø613
111
Q131Ø612
111
Q131Ø813
111
Q131Ø89
122
Q131Ø1011
142
Q131Ø1010
183
Q188Ø1216
244
Q257Ø1216
12 Ø620
12 Ø620
12 Ø630
12 Ø830
12 Ø830
12 Ø1030
14 Ø1030
18 Ø1030
24 Ø1030
6,0 110
Q131Ø613
110
Q131Ø613
111
Q131Ø69
111
Q131Ø66
131
Q131Ø89
162
Q188Ø65
213
Q221Ø65
12 Ø620
12 Ø620
12 Ø640
12 Ø830
13 Ø840
16 Ø1030
21 Ø1030
8,0 110
Q131Ø613
110
Q131Ø612
111
Q131Ø67
141
Q131Ø811
182
Q188Ø811
213
Q295Ø811
12 Ø620
12 Ø630
12 Ø830
14 Ø830
18 Ø830
25 Ø830
AB
CDE
F GH
A - floor slab thickness B - number of shores per span at the construction stage C - type of anti-crack reinforcement mesh D - rebar gauge over the props (2 cm casing)E - distribution of rebars over the props F - floor slab thickness for REI 60G- rebar gauge in the floor sheet wave, adapted to fire loads H- fireproof rebar casing
Assumptions for the Tables- all loads shown in the table are characteristic values- assumed concrete grade: C25/30- assumed reinforcement steel grade: A-IIIN (RB500W)- assumed load safety factor: 1.5- assumed floor sheet gauge: 0.75 mm- all span lenghts are measured at centre lines of the props- tables based on equal lenght spans
Cofraplus 60. Safe load tables
Continuous floor slab – triple-span
Rozpiętość podpór konstrukcji nośnej [mm]
L2/3L1/3 L2/3L1/3
L1 L2 L3
Qk[kN/m2]
1500 2000 2500 3000 3500 4000 4500 5000 5500 6000
1,5 110
Q131Ø613
110
Q131Ø613
111
Q131Ø613
111
Q131Ø613
111
Q131Ø613
122
Q131Ø611
132
Q131Ø69
152
Q131Ø813
163
Q188Ø1018
183
Q188Ø810
12 Ø620
12 Ø620
12 Ø620
12 Ø620
12 Ø640
12 Ø830
13 Ø830
15 Ø840
16 Ø1030
18 Ø1030
2,5 110
Q131Ø613
110
Q131Ø613
111
Q131Ø613
111
Q131Ø613
111
Q131Ø610
122
Q131Ø68
132
Q131Ø811
152
Q131Ø66
163
Q188Ø65
183
Q188Ø88
12 Ø620
12 Ø620
12 Ø620
12 Ø630
12 Ø830
12 Ø830
13 Ø840
15 Ø1030
16 Ø1030
18 Ø1040
3,5 110
Q131Ø613
110
Q131Ø613
111
Q131Ø613
111
Q131Ø611
111
Q131Ø813
122
Q131Ø811
142
Q131Ø810
162
Q188Ø89
173
Q188Ø1216
214
Q221Ø1216
12 Ø620
12 Ø620
12 Ø630
12 Ø830
12 Ø830
12 Ø1030
14 Ø1030
16 Ø1030
17 Ø1040
21 Ø1040
4,5 110
Q131Ø613
110
Q131Ø613
111
Q131Ø613
111
Q131Ø69
111
Q131Ø66
122
Q131Ø1013
152
Q131Ø65
183
Q188Ø1013
244
Q257Ø65
12 Ø620
12 Ø620
12 Ø630
12 Ø830
12 Ø840
12 Ø1030
15 Ø1030
18 Ø1030
24 Ø1030
6,0 110
Q131Ø613
110
Q131Ø613
111
Q131Ø610
111
Q131Ø812
131
Q131Ø66
162
Q188Ø810
203
Q221Ø1015
12 Ø620
12 Ø620
12 Ø640
12 Ø830
13 Ø830
16 Ø1030
20 Ø1030
8,0 110
Q131Ø613
110
Q131Ø613
111
Q131Ø88
141
Q131Ø813
182
Q188Ø67
253
Q295Ø67
12 Ø620
12 Ø630
12 Ø830
14 Ø830
18 Ø840
25 Ø830
111
Q131Ø610
12 Ø840
11 cm – total thickness of the composite floor slab (cm) for rei 301 – number of shores per span at the construction stage q131 – type of anti-crack reinforcement mesh ø 6 mm – rebar gauge over the props (2 cm casing)10 cm – distribution of rebars over the props ø 8 mm – rebar gauge in the floor sheet wave, calculated to withhold fire loads for rei 6012 cm – floor slab thickness for rei 60
Objaśnienia do tabeliq – operational loadq = q1 + g1q1 – changing loadg1 – static loadL- Span lenghts of the support structuren - number of floor slab spans
e.g. L= 3500 n = 3 q1=2,5 kN/m2
g1=1 kN/m2
q = 3,5 kN/m2
taken from Table 3.
Cofraplus 60. Safe load tables
Punching
Cofraplus 60 may be manufactured with pre-punched openings for connectors to join floor beams with the floor slab. This version is designated as COFRAPLUS 60P. All re-levant calculations and production of pre-punched profiles are made on demand.
COFRAPLUS 60PReady-made punching system
Additional service
Formwork of the floor slab edgeA zinc-coated steel strip, bended at the right angle, provides the formwork of the floor slab edge. Standard lengths of the flashing are as follows: from 2 to 4 m.
On the building site other additional and unavoidable accessories and materials must be provided.
Floor slab thickness[cm]
Sheet edging thickness[mm]
≤1112 - 14
≥ 15
1,201,502,00
Expanded plastic sealants - thickness 40 mm- Length 1035 mm- Self-adhesive part
Binding material
Cofraplus 60. Safe load tables
Reinforcement meshes
The crosswise spacing of the bars is adjusted in a stepless manner a = 300 – 500 mmThe lengthwise spacing of the bars b = 100, 150, 200 mm
Mesh types
The lengthwisespacing
of the bars x diameterMesh sheet length
Ends projections on their length
Mesh sheet weight
The lengthwise barsreinforcement section
The crosswise spacing of the bars x diameter
Mesh sheet widthEnds projections on
their widthThe crosswise bars
reinforcement section
[mm] [m] [mm] [kg] [cm2/m]
Q 131150 x 5,0 5,00 100 100
22,51,31
150 x 5,0 2,15 25 25 1,31
Q 188150 x 6,0 5,00 100 100
32,41,88
150 x 6,0 2,15 25 25 1,88
Q 221150 x 6,5/5,0-4/4 5,00 100 100
33,72,21
150 x 6,5 2,15 25 25 2,21
Q 257150 x 7,0 5,00 100 100
44,12,57
150 x 7,0 2,15 25 25 2,57
Q 295150 x 7,5/5,5-4,4 5,00 100 100
44,22,95
150 x 7,5 2,15 25 25 2,95
Q 335150 x 8,0 5,00 100 100
57,73,35
150 x 8,0 2,15 25 25 3,35
Q 377150 x 6,0d-6,0-4/4 6,00 100 100
67,63,77
100 x 7,0 2,15 25 25 3,77
Q 378150 x 8,5/6,0-4/4 6,00 150 150
66,73,78
150 x 8,5 2,15 25 25 3,78
Q443150 x 6,5/6,5-4/4 6,00 100 100
78,34,43
100 x 7,5 2,15 25 25 4,43
Q 513150 x 7,0d/7,0-4/4 6,00 100 100
90,05,13
100 x 8,0 2,15 25 25 5,13
Q 524*150 x 10,0 5,00 100 100
90,15,24
150 x 10,0 2,15 25 25 5,24
Q 670150 x 8,0d/8,0-4/4 6,00 100 100
115,46,70
100 x 9,0 2,15 25 25 6,70
*10 mm wire mesh are manufactured in accordance with DIN 488. Configuration and structure can be done according to Customers’ demands.
ArcelorMittalConstruction SolutionsKonopnica 12096-Rawa MazowieckaPolandT. +48 46 813 28 00F. + 48 22 213 38 [email protected]