Composite floor deck

ComFlor® 100

Strong long span composite profile for non-composite beams

Building Systems UK's ComFlor® 100 is a strong long span profile that reduces or eliminates temporary propping irrespective of the frame design. It provides a composite floor slab and is suitable for use with concrete beams or non-composite steel beams.

  • Long span strength
  • Fast laying
  • Suitable for use with concrete beams or non-composite steel beams
  • Nestable profile

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Tata Steel construction flooring ComFlor 100
Tata Steel construction flooring ComFlor 100
Tata Steel construction flooring ComFlor 100
Tata Steel construction flooring ComFlor 100 non-composite formwork
Product specification

EN-Construction-Product-ComFlor 100-default

ComFlor 100
Specification details

EN-Construction-Product-ComFlor 100 | Benefits

Benefits
  • Long span strength: Long span strength reduces or eliminates temporary propping.
  • Nestable: The simple trapezoidal shape neatly nests one profile into another, allowing more square metres per bundle.
  • Fast laying: As simple to install as a roof deck, the concrete can soon be poured.
  • Efficient for export: Maximises the square meterage in each container.

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Airios in Veldhoven The Netherlands Tata Steel ComFlor, composite floor deck

EN-Construction-Product-ComFlor 100 | Volume and weight

Volume and weight

ComFlor® 100 Composite slab - volume and weight (BS values)

    Weight of concrete (kN/m2)
Slab depth
(mm)
Concrete
volume (m3/m2)
Normal weight concrete Lightweight concrete
Wet Dry Wet Dry
150 0.090 - - 1.69 1.60
160 0.100 2.37 2.32 1.87 1.77
170 0.110 2.60 2.55 2.06 1.95
180 0.120 2.84 2.78 2.25 2.13
190 0.130 3.07 3.01 2.43 2.30
200 0.140 3.31 3.24 2.62 2.48
210 0.150 3.54 3.47 2.80 2.66
220 0.160 3.78 3.70 2.99 2.83
230 0.170 4.01 3.93 3.18 3.01
250 0.190 4.48 4.39 3.55 3.36

Notes

1. Deck and beam deflection (ie, ponding) is not included in the table.

2. Deck and mesh weight is not included in the weight of concrete figures.

3. British Standard density of concrete is taken as:

Normal weight (wet) 2400 kg/m3

Normal weight (dry) 2350 kg/m3

Lightweight (wet)     1900 kN/m3

Lightweight (dry)     1800 kN/m3

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EN-Construction-Product-ComFlor 100 | Section properties and design notes

Section properties and design notes

ComFlor® 100 (S280) Section properties (per metre width)

Nominal thickness (mm) Design thickness (mm) Cross section area (mm2/m) Profile weight (kN/m2) Height to neutral axis (mm) Moment of inertia
(cm4/m)
Ultimate moment capacity (kNm/m)
Sagging Hogging Sagging Hogging
0.90 0.86 1511 0.12 58.00 225.77 - 11.26 11.20
1.20 1.16 2022 0.16 58.00 298.00 - 12.40 18.64

Section properties in the above table conform to BS 5950.

Design notes:

Deck material
Tata Steel Galvatite®, hot dip zinc coated steel to BS EN 10346 S280GD+Z275, with guaranteed minimum proof strength of 280N/mm2 and zinc coating of total mass 275g/m2 (including both sides). This is sufficient for internal floors in a non-aggressive environment, which satisfies the requirement in clause 4.2 BS EN 1994-1-1 - the exposed surfaces of the steel decking shall be adequately protected to resist the particular atmospheric conditions. A zinc coating, if specified, should conform to the requirements of BS EN 10346. The specification may be varied, depending on service conditions.

Anti-crack mesh
As a minimum requirement where the control of crack width is of no interest, BS EN 1994-1-1, 9.8.1(2) recommends that, where continuous slabs are designed as simply-supported in accordance with BS EN 1994-1-1, 9.4.2(5), the cross-sectional area of the anti-crack reinforcement above the ribs should be not less than 0.2% of the cross-sectional area of the concrete above the ribs for un-propped construction, and 0.4% of this cross-sectional area for propped construction. The mesh specified in the quick reference Eurocode tables, complies with this clause.

Where forklift truck (or other similar concentrated loading) is expected, 0.5% minimum percentage reinforcement should be used over the supports and the previous stated percentages elsewhere to control cracking. For further information refer to SCI AD150.

In accordance with Steel Construction Institute (SCI) P300 ‘Composite Slabs and Beams Using Steel Decking: Best Practice for Design and Construction, a nominal cover of 25mm is stated for an exposure level XC1, for all concrete cylinder strengths for both normal (C25/30 to C40/50) and lightweight concrete (LC25/28 to LC32/35). This nominal cover of 25mm is the minimum cover of 15mm plus a fixing tolerance of 10mm.

Supporting beam width
For all ComFlor® 46 load/span tables, the width of the support beam used is assumed to be 152mm.

Fire design
The capacity of a composite slab with nominal anti-crack mesh in fire is calculated in accordance with Steel Construction Institute NCCI PN005 ‘Fire resistance design of composite slab’. Two fire-design methods can be used in the ComFlor® 9 software, namely ‘Mesh and Deck Fire Method’ or ‘Bar Fire Method’. For further details of the performance of composite slabs with nominal anti-crack mesh in fire, please contact the technical team.

Design support
The Technical Department at Tata Steel 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 ComFlor® 9 software, please contact us.

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EN-Construction-Product-ComFlor 100 | Load span tables

Load span tables

Our Load Span tables are designed to optimise the span in the construction stage, with the minimum amount of anti-crack reinforcement required by the relevant design code, while also considering the minimum requirements for the various imposed loading and fire resistance periods.

For more information on our ComFlor® 100 Load Span parameters see our product downloads below.

If you have any questions or for further information click here to contact us.

EN-Construction-Product-ComFlor with FibreFlor | ComFlor® 9.0.34 software

ComFlor® 9.0.34 software

ComFlor® 9.0.34 Software analyses each of the ComFlor® composite floor decks in construction stage, service stage and for fire resistance, under a wide range of loading configurations.

Design principles are in accordance with the appropriate parts of BS 5950 : Part 4 (1994), Part 6 (1995), Part 8 (1991) For design to the Eurocodes, the design principles are in accordance with EN 1994-1-1 and EN 1994-1-2:Eurocode 4. The design checks performed by the program cover the construction stage, the normal design stage and fire.

The slab may be propped or unpropped during construction and may also span over one or more permanent or temporary supports. In the double span case, the spans may be equal or unequal. At the normal design stage, however, the slab is always assumed to be simply support