ComFlor® 46
From the Panels and Profiles' shallow composite profile range
ComFlor® 46, first introduced in 1985, is a simple trapezoidal composite deck with strong and reliable shear bond performance. The profile is economic and nestable, reducing transport and handling costs.
Nestable
The ultra efficient nesting capability of ComFlor® 46 reduces the transport volume of the product. This fact, combined with the simplicity of ComFlor 46, also makes it ideal for export.
Easy service suspension
Ceilings and lightweight services can easily be attached to the punched hangar tabs which can be included with ComFlor® 46. These must be specified at time of order.
Low concrete usage
The trapezoidal shape profile of ComFlor® 46 reduces the volume of concrete used, with resultant savings in structural and foundation costs.
Design information
| ComFlor® 46 composite slab - volume and weight | |||||
|
Weight of concrete (kN/m2)
|
|||||
|
Normal weight concrete
|
Lightweight concrete
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||||
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Slab depth (mm)
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Concrete volume (m3/m2)
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Wet
|
Dry
|
Wet
|
Dry
|
|
110
|
0.091
|
2.14
|
2.10
|
1.69
|
1.60
|
|
115
|
0.096
|
2.26
|
2.21
|
1.79
|
1.69
|
|
120
|
0.101
|
2.38
|
2.33
|
1.88
|
1.78
|
|
130
|
0.111
|
2.61
|
2.56
|
2.07
|
1.96
|
|
140
|
0.121
|
2.85
|
2.79
|
2.25
|
2.13
|
|
145
|
0.126
|
2.96
|
2.90
|
2.35
|
2.22
|
|
150
|
0.131
|
3.08
|
3.02
|
2.44
|
2.31
|
|
180
|
0.161
|
3.79
|
3.71
|
3.00
|
2.84
|
|
200
|
0.181
|
4.26
|
4.17
|
3.37
|
3.19
|
|
240
|
0.221
|
5.20
|
5.09
|
4.12
|
3.90
|
Volume & weight table notes
1. Deck and beam deflection (i.e. ponding is not allowed for in the table).
2. Deck and mesh weight is not included in the weight of concrete figures.
3. Density of concrete is taken as:
• Normal weight (wet) 2400 kg/m3
• Normal weight (dry) 2350 kg/m3
• Lightweight (wet) 1900 kg/m3
• Lightweight (dry) 1800 kg/m3
| Section properties (per metre width) | |||||||
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Nominal thickness (mm)
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Design thickness (mm)
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Profile weight (kN/m2)
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Area of steel (mm2/m)
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Height to neutral axis (mm)
|
Moment of inertia (cm4/m)
|
Ultimate moment capacity (kNm/m)
|
|
|
Sagging
|
Hogging
|
||||||
|
0.90
|
0.86
|
0.09
|
1137
|
20.38
|
41.50
|
4.63
|
4.67
|
|
1.20
|
1.16
|
0.13
|
1534
|
20.44
|
53.00
|
5.99
|
6.23
|
Deck material
Corus Galvatite, hot dip zinc coated steel EN 10326-S280GD+Z275. Guaranteed minimum yield stress 280N/mm2. Minimum zinc coating mass 275g/m2 total both sides.
Quick reference tables
The quick reference load/span and fire design tables, in the ComFlor® manual are intended as a guide for initial design, based on the parameters stated below the tables.
Full design can be carried out using the free Comdek software.
Anti-crack mesh
BS 5950: Part 4 currently recommends that anticrack mesh should comprise 0.1% of slab area. The Eurocode 4 recommendation is that anticrack mesh should comprise 0.2% of slab area for unpropped spans and 0.4% of slab area for propped spans. The mesh shown in the quick reference tables complies with EC4 and the design program defaults to these values. Where EC4 mesh rules are used, the mesh may be reduced midspan. The reduced British Standard mesh values may still be used by overriding this default in the design program.
Where forklift truck (or other similar concentrated loading) is expected 0.5% minimum percentage reinforcement should be used over the supports and 2% elsewhere to control cracking. For further information refer to the ComFlor® manual.
Mesh top cover must be a minimum of 15mm, and a maximum of 30mm. Mesh laps are to be 300mm for A142 mesh and 400mm for A193, A252 & A393 mesh.
Fire
For details of the performance of composite slabs comprising ComFlor® 46 decking under a fire condition with nominal anti-crack mesh, please refer to the quick reference fire load tables in this brochure. For other simplified design cases or for full fire engineering, refer to the Comdek software.
Technical services
The Technical Department at Corus offers a comprehensive advisory service on design of composite flooring, which is available to all specifiers and users. Should queries arise which are not covered by this literature or by the Comdek software, please contact us.
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