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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


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


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


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)


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


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


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.


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


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]

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