![]() Users should note that all BCA software and publications are subject to me to time and should therefore ensure that they are in possession of the latestĮt should be used in compliance with the accompanying publication 'Spreadsheets sign to BS 8110 and EC2' available from British Cement Association, Telford Avenue, rkshire RG45 6YS. No liability (including that for negligence) for any loss such advice or information is accepted by the BCA, RCC or their subcontractors, visors. Revision history RCC14 Crack Width.xlsįormation from the British Cement Association and/or Reinforced Concrete Council is hose who will evaluate the significance and limitations of its contents and take or its use and application. Status of spreadsheet Public release version. This spreadsheet should be used in compliance with the accompanying publication 'Spreadshe for concrete design to BS 8110 and EC2' available from British Cement Association, Telford Aven Crowthorne, Berkshire RG45 6YS. ![]() Users should note that all BCA software and publications are subjec revision from time to time and should therefore ensure that they are in possession of the la version. No liability (including that for negligence) for any resulting from such advice or information is accepted by the BCA, RCC or their subcontract suppliers or advisors. " Z " = d-(x/3) = 84 Reinforcement stress " fs " = Ms/(As*Z) = 213 N/mm2 Concrete stress " fc " = (fs*As)/(0.5*b*x) = 4.81 N/mm2 Strain at soffit of concrete beam/slab "" = (fs/Es)*(h-x)/(d-x) = 0.002288 Strain due to stiffening effect of concrete between cracks " 2 " = 2 = b.(h-x)2/(3.Es.As.(d-x)) for crack widths of 0.2 mm Used 2 = 1.5.b.(h-x)2/(3.Es.As.(d-x)) for crack widths of 0.1 mm n/a 2 = 0.002108 Average strain for calculation of crack width " m "= 1- 2 = 0.000180 Calculated crack width, " w " = 3.acr.m/(1+2.(acr-c)/(h-x)) CALCULATED CRACK WIDTH, 'w' =Īll advice or information from the British Cement Association and/or Reinforced Concrete Counc intended for those who will evaluate the significance and limitations of its contents and t responsibility for its use and application. INPUT fcu= 40 N/mm2 fy= 460 N/mm2 Area of reinforcement " As " = 2 mm b= 170 mm h= 91 mm d= 75 mm Minimum cover to tension reinforcement " CO " = 200 mm Maxmum bar spacing " S " = Bar dia " DIA " = 8 mm " acr " =(((S/2)^2+(CO+DIA/2)^2)^(1/2)-DIA/2) as default or enter other value = 123.44 mm "acr " is distance from the point considered to the surface of the nearest longitudinal bar Applied service moment " Ms "= 4.5 KNm CALCULATIONS moduli of elasticity of concrete " Ec" = (1/2)*(20+0.2*fcu) = moduli of elasticity of steel " Es " = Modular ratio " " = (Es/Ec) = " " = As/bd = depth to neutral axis, "x" = (- +(()2 + 2.)0.5.d = ![]() Crack Width Calculations to BS8110: 1997/ BS8007:1987 Originated from RCC14.xls v 2.1on CD ![]()
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