Cofraplus 60 Load Span tables - PGA Consultants

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Composite floor decks
Cofraplus 60
MESH REINFORCEMENT, SLAB DEPTH AND PROPPING REQUIREMENTS UNDER TYPICAL APPLIED LOADS
These tables apply to simple cases where there are distributed loads and equal spans.
Using the Cofra 4 software, our technical team can carry out composite floor deck studies in the shortest possible time.
q = 2,50 kN/m 2
L
(cm)
Up to 340
from 340 to 360
from 360 to 370
from 370 to 390
from 390 to 430
from 430 to 450
from 450 to 460
from 460 to 480
from 480 to 500
AcM : Anti crack Mesh
TB : Top Bars
Number
of props
0
1
1
1
1
1
1
1
1
3 span system
e = 0,75 mm
AcM d TB
(cm)
PAF-R 10 PAF-R
ST 10 10 PAF-R
PAF-R 11 ST 20
ST 10 11 ST 20
ST 10 12 ST 20
ST 10 13 ST 20
ST 10 13 ST 25
ST 10 14 ST 25
ST 10 15 ST 25
L L L
q = 3,50 kN/m 2
L
(cm)
Up to 310
from 310 to 330
from 330 to 340
from 340 to 360
from 360 to 370
from 370 to 380
from 380 to 390
from 390 to 400
from 400 to 410
from 410 to 420
from 420 to 430
from 430 to 440
from 440 to 450
from 450 to 460
from 460 to 470
from 470 to 480
from 480 to 490
from 490 to 500
Number
of props
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
e = 0,75 mm
AcM d TB
(cm)
PAF-R 10 PAF-R
PAF-R 10 ST 10
ST 10 10 PAF-R
ST 20 10 PAF-R
ST 10 11 ST 20
ST 10 11 ST 25
ST 10 12 ST 20
ST 10 12 ST 25
ST 20 12 ST 25
ST 10 13 ST 25
ST 20 13 ST 20
ST 10 14 ST 25
ST 20 14 ST 20
ST 10 15 ST 25
ST 20 15 ST 20
ST 20 15 ST 35
ST 20 16 ST 25
ST 20 16 ST 35
12
q = 5,00 kN/m 2
L
(cm)
Up to 260
from 260 to 280
from 280 to 300
from 300 to 320
from 320 to 340
from 340 to 360
from 360 to 380
from 380 to 400
from 400 to 410
from 410 to 420
from 420 to 430
from 430 to 440
from 440 to 450
from 450 to 470
from 470 to 480
from 480 to 490
from 490 to 500
Number
of props
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
2
2
3 span system
e = 0,75 mm
AcM d TB
(cm)
PAF-R 10 PAF-R
ST 10 10 PAF-R
ST 10 10 ST 10
ST 10 10 ST 20
ST 20 10 ST 10
ST 20 12 ST 20
ST 20 13 ST 20
ST 20 14 ST 20
ST 20 15 ST 20
ST 20 15 ST 25
ST 20 16 ST 20
ST 20 17 ST 20
ST 20 17 ST 25
ST 20 18 ST 25
ST 20 19 ST 25
ST 10 22 ST 30
ST 10 23 ST 30
Basis of table
q = imposed load
q = q 1 + g 1
q 1 = imposed live load
g 1 = imposed permanent load
(partition wall, floor covering, suspended ceilings) taken
into account as operating loads.
e.g. : L = 4,00 m
q 1 = 1,50 kN/m 2
g 1 = 1,00 kN/m 2
Consult the table : q = 2,50 kN/m 2 .
12 = slab depth d
ST 10 12 ST 20
ST 10 = Anti Crack Mesh
ST 20 = Top Bars (Mesh)
L L L
q = 8,00 kN/m 2
L
(cm)
Up to 200
from 200 to 220
from 220 to 240
from 240 to 250
from 250 to 260
from 260 to 270
from 270 to 280
from 280 to 290
from 290 to 300
from 300 to 310
from 310 to 320
from 320 to 330
from 330 to 340
from 340 to 350
from 350 to 360
from 360 to 380
from 380 to 390
from 390 to 400
from 400 to 410
from 410 to 420
from 420 to 430
from 430 to 440
from 440 to 450
Number
of props
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
2
2
2
Complementary assumptions :
• Normal weight concrete 2400 daN/m 3
• Deflection at laying stage =
L
240
• Active deflection in service =
L
350
• Shrinkage = 4 x 10 -4
• Covering of top bars = 20 mm
• Top Bars : yield point 500 MPa
e = 0,75 mm
AcM d TB
(cm)
PAF-R 10 PAF-R
ST 10 10 PAF-R
ST 10 10 ST 10
ST 20 10 PAF-R
ST 20 10 ST 10
ST 20 11 PAF-R
ST 20 11 ST 10
ST 20 12 PAF-R
ST 20 12 ST 10
ST 20 13 ST 10
ST 20 15 ST 10
ST 20 16 ST 10
ST 20 16 ST 20
ST 20 17 ST 20
ST 20 18 ST 20
ST 20 19 ST 20
ST 20 20 ST 20
ST 20 21 ST 20
ST 20 22 ST 20
ST 20 23 ST 20
ST 10 26 ST 25
ST 10 27 ST 25
ST 10 28 ST 25