Composite floor deck

ComFlor® 210

The original deep composite profile introduced for the first Slimflor systems with a very effective cross stiffener technology.

Building Systems UK's ComFlor® 210 has very effective cross stiffener technology and the deep profile shape provides a very efficient metal deck and composite slab, with a low usage of concrete. Slimflor systems have wider lower flange steel beams that allow the deck to land on the bottom flange.

  • Efficient - low use of steel and concrete
  • Versatile – top or bottom flange application
  • Nestable profile gives low transport and handling costs

To download the BIM objects for the RoofDek product range please click on the 'Download BIM Objects' tab below.

Request a bespoke product specific EN 15804 Type III EPD to help accrue points under building certification schemes such as LEED and BREEAM.

Tata Steel construction flooring ComFlor 210
Nova Victoria, London 1 roofdek tata steel construction
Tata Steel construction flooring ComFlor 210
Tata Steel construction flooring ComFlor 210 non-composite formwork
Product specification

EN-Construction-Product-ComFlor 210-default

ComFlor 210
Specification details

EN-Construction-Product-ComFlor 210 | Benefits

  • Efficient: Cross stiffener technology and deep profile shape provides a very efficient metal deck and composite slab giving low usage of steel and concrete.
  • Versatile: Especially suited to bear on the extended lower flange of a steel beam, can also be used on the top flange.
  • Nestable: The simple trapezoidal shape neatly nests one profile into another, allowing more square metres per bundle.
  • Efficient for export: Maximises the square meterage in each container.

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

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

EN-Construction-Product-ComFlor 210 | Volume and weight

Volume and weight

ComFlor® 210 Composite slab - volume and weight (BS values)

    Weight of concrete (kN/m2)
Slab depth
volume (m3/m2)
Normal weight concrete Lightweight concrete
Wet Dry Wet Dry
260 0.091 - - 1.70 1.61
270 0.101 2.38 2.33 1.89 1.79
280 0.111 2.62 2.56 2.07 1.96
290 0.121 2.85 2.79 2.26 2.14
300 0.131 3.09 3.03 2.45 2.32
305 0.136 3.21 3.14 2.54 2.41
310 0.141 3.33 3.26 2.63 2.49
330 0.161 3.80 3.72 3.01 2.85
350 0.181 4.27 4.18 3.38 3.20
375 0.206 4.86 4.76 3.85 3.64
400 0.231 5.44 5.33 4.31 4.08
500 0.331 7.80 7.64 6.17 5.85


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 kg/m3

Lightweight (dry)     1800 kg/m3

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

EN-Construction-Product-ComFlor 210 | Section properties and design notes

Section properties and design notes

ComFlor® 210 (S350) 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
Ultimate moment capacity (kNm/m)
Sagging Hogging Sagging Hogging
1.25 1.21 2009 0.16 95.00 816.00 - 23.20 23.20

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 ‘C