EC2 slab example
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36 Simply supported one-way slab 3.1 chg CCIP – 041 web 1 TCC Oct 09 Simply supported one-way slab A 175 mm thick slab is required to support screed, finishes, an office variable action of 2.5 kN/m 2 and demountable partitions (@ 2 kN/m). The slab is supported on load-bearing block walls. f ck = 30 MPa, f yk = 500 MPa. Assume a 50-year design life and a requirement for 1 hour resistance to fire. q k = 3.3 kN/m 2 g k = 5.9 kN/m 2 4800 Figure 3.1 Simply supported one-way slab 3.1.1 Actions kN/m 2 Permanent: Self-weight 0.175 × 25 = 4.4 EC1-1-1: Table A1 50 mm screed = 1.0 Finishes, services = 0.5 Total g k = 5.9 Variable: Offices, general use B1 = 2.5 EC1-1-1: Tables 6.1, 6.2 & NA Movable partitions @ 2.0 kN/m = 0.8 Total k = 3.3 EC1-1-1: 6.3.12(8) 3.1.2 Cover Nominal cover, c nom : c nom = c min + Dc dev where c min = max[c min,b ; c min,dur ] where c min,b = minimum cover due to bond = diameter of bar Assume 12 mm main bars. c min,dur = minimum cover due to environmental conditions Assuming XCI and using C30/37 concrete, c min,dur = 15 mm Dc dev = allowance in design for deviation. Assuming no measurement of cover, Dc dev = 10 mm c nom = 15 + 10 = 25 mm Exp. (4.1) Cl. 4.4.1.2(3) Table 4.1. BS 8500-1: Table A4. Cl. 4.4.1.2(3)
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EC2 slab example
Transcript of EC2 slab example
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