DESIGNDESIGN OF A SLAB SECTION FOR A KNOWN MOMENTFor 1 m wide stripOperate the Yellow CellsSl No.ItemValueUnitA. Design for Flexure1Grade of Concrete (fck)20N/mm22Grade of Steel (fy)415N/mm23Factored moment (Mu)4kNm4Effective Depth Required for Balanced Section38mm5Effective Depth Provided (d)100mm6Overall Depth Provided (D)125mm7Area of Steel Required (Ast)114mm28Diameter of Main Bars Used8mm9Spacing of Main Bars Required441mm10Maximum Spacing Permitted for Main Steel [300mm or 3*d, whichever is less]300mm11Area of Distribution Steel Required, if One-way Slab [0.15% for MS Bars & 0.12% for HYSD Bars]150mm212Diameter of Distribution Bars Used8mm13Spacing of Distribution Bars Required335mm14Maximum Spacing Permitted for Distribution Steel [450mm or 5*d, whichever is less]450mmB. Deflection Control by Limiting Span to Effective Depth Ratio [Cl: 23.2 & 24.1 of IS 456 : 2000]15Spacing of Main Bars Actually Provided [At Shorter Mid Span for Four Sides Supported Slab and at Fixed End for Cantilever Slab]150mm16Area of Steel Provided335mm217Service Stress in Steel (fs)82N/mm218Modification Factor [ As per Fig. 4 of IS 456 : 2000 ]5.219Span of the Slab [Shorter for Two-way Slab] (L)0.9metre20Support Condition of the SlabCantilever21Basic (L/d) Ratio722Maximum Permissible (L/d) Ratio for Deflection Control36.423(L/d)Provided9