See the Instructions on the BM-DSN worksheet. Give Input Data in white space, with red font. * The Input data : Area of Tension Steel at Critical Section, Effective Cover for Tension Steel, Grade of Steel for Strrups, No. Hence the segment of beam can be identified by the designer from the Shear Force envelope obtained from the analysis results, for which minimum shear reinforcement would suffice. * It will calculate the magnitude of factored shear force which will be safely carried by minimum shear reinforcement. Design Shear Force for Minimum Shear Reinforcement: The designer should see thatclosest spacing should be approximately 100mm for ease of concreting, as far as possible.ģb. 40.4, along with minimum shear reinforcement and max. * The spacing of stirrups would be calculated using Cl. * The Input data for the Beam design for Shear :įactored Shear Force at Critical Section (Vu), Effective Cover for Tension Steel, Grade of Steel for Strrups, No. Rectangular Beam Design for Shear as per IS 456 : for zero % redistribution of moment with Fe 415 steel.ģa. Recalculate the effective cover based on the rebar arrangement, with input of revised cover recalculate design steel required. * Based on the area of steel required 'Ast', use Rebar calculator to to determine size and number of bars required. If Ast,calculated > Ast,max, A message to "REV DEPTH" appers in the cell. The Maximimum Tension Steel is 4 % of the gross area of section.
* For given BM, Mu Mu,lim both tension and comp. To start with 40 to 50mm cover may adopted and corrected on finding the actual disposition of bars in next iteration by the designer. of layers in which steel would be provided. cover would be calculated by designer based on no. In mild exposure condition for a fire resistance of 0.5 hour, 20mm cover is provided for stirrups. * Clear cover for the beam would be as per Table16 for Durability criteria and as per Table 16A for Fire resistance criteria. * The Input data for the Beam design for Flexure :įactored BM (Mu), Beam Dimensions and Effective Cover for Tension and Compression Steel, Grade of Concrete fck Rectangular Beam Design for Flexure as per IS 456 : Check for minimum shear reinforcement, maximum spacing of shear reinforcement is done as per the Code.Ģ. Check for Minimum and Maximum Reinforcement criteria is considered for Flexure as per the Code. The design of reinforcement for Limit State of Collapse in Flexure and Shear for Rectangular Beam Section is carried out as per IS-456.
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