![]() ![]() ![]() Should queries arise which are not covered by this literature or by the ComFlor® 9 software, please contact us. The Technical Department at Tata Steel offers a comprehensive advisory service on design of composite flooring, which is available to all specifiers and users. For further details of the performance of composite slabs with nominal anti-crack mesh in fire, please contact the technical team. Two fire-design methods can be used in the ComFlor® 9 software, namely ‘Mesh and Deck Fire Method’ or ‘Bar Fire Method’. 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’. This nominal cover of 25mm is the minimum cover of 15mm plus a fixing tolerance of 10mm.įor all ComFlor® 46 load/span tables, the width of the support beam used is assumed to be 152mm. 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). For further information refer to SCI AD150. 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. The mesh specified in the quick reference Eurocode tables, complies with this clause. The specification may be varied, depending on service conditions.Īs a minimum requirement where the control of crack width is of no interest, BS EN, 9.8.1(2) recommends that, where continuous slabs are designed as simply-supported in accordance with BS EN, 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. A zinc coating, if specified, should conform to the requirements of BS EN 10346. This is sufficient for internal floors in a non-aggressive environment, which satisfies the requirement in clause 4.2 BS EN - the exposed surfaces of the steel decking shall be adequately protected to resist the particular atmospheric conditions. 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). ComFlor® 60 (S350) Section properties (per metre width) Nominal thickness ![]()
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