• Crack Width Calculation Ec210

Indian or British CodesIS 456 - 2000 Annex F and BS 8110 Part II, Clause 3.8 include the same method for determining the nominal crack width for design. This procedure is based on work by Andrew Beeby. The crack width determined by this method represents a best-fit for experimental data where the stress in the tension steel is limited to 0.8x F y.The following assumptions are made for this method:. S m = 1.5 a cr. W mean is a funciton of S m and ε m. W max = 2x W meanThe following procedure is then used by the program to evaluate the crack width for design:.Calculate the modular ration, m as:m = E c/E sWhere:Es = 20,000 N/mm 2 (IS 456 - 2000, Annex F)Ec = 5,000√(f c) (Cl. 6.2.3.1 of IS 456 - 2000).Calculate the depth of the neutral axis, x, per the limit state method (IS 456 - 2000 Annex G and BS 8110 Part I Cl.

Crack Width Calculation Ec210

3.4.4.4). Calculate the moment of inertia of the equivalent section, I eff.Calculate the effective modulus of elasticity of concrete, E eff.