Bar bending schedule provides the steel quantity requirement much accurately and thus provides an option to optimize the design in case of cost overrun.ġ0. It provides benchmarks for quantity and quality requirements for reinforcement and concrete works.ĩ. It becomes helpful in preventing any damages due to construction time overrun.Ĩ. So, overall project activity management becomes easy and reduces the time of construction. Other activities such as excavation, PCC, etc can proceed parallel with this activity.
Bar bending schedule can be used for reinforcement cutting, bending, and making a skeleton of a structural member before it can be placed at the required position. Bar bending schedule is very much useful during auditing of reinforcement and provides checks on theft and pilferage.ħ.
It also prevents a shortage of reinforcement for ongoing work by accurate estimation and thus concrete construction works can proceed smoothly.Ħ. This prevents the stocking of extra steel reinforcement at the site for a longer time, preventing corrosion of reinforcement in the case of coastal areas.
Steel requirement for the next phase of construction can be estimated with accuracy and procurement can be done. It provides better stock management for reinforcement. It provides a better estimation of reinforcement steel requirement for each and every structural member which can be used to compute overall reinforcement requirement for the entire project.ĥ. It improves the quality control at the site as reinforcement is provided as per bar bending schedule which is prepared using the provisions of respective detailing standard codes.Ĥ. Using a bar bending schedule when used for Fe500, saves 10% more steel reinforcement compared to fe415.ģ. This increases faster execution at the site and reduces construction time and cost due to less requirement of workers for bar bending.īar bending also avoids the wastage of steel reinforcement (5 to 10%) and thus saves project costs.Ģ. When Bar bending schedule is available, cutting and bending of reinforcement can be done at the factory and transported to the site.
#Civil engineering formulas in urdu how to
Read More: How to Calculate Steel Quantity from Drawing | BBS of Slab | Steel Quantity Calculation Advantages of Bar Bending Schedule (BBS)ġ. Width of Slab at one end for bent up at Top L = 3.61 In case of bent up bars are provided on both sides, we have to add 0.45 X twice in length ) L = 3.58 m (Straight length without bent) L = Span Length + Wall Width(Right) + Wall Width (Left) + 2 x 9D (Hooks) – 2xCover 180 c/cġ2 mm dia main Steel 150 mm c/c Alternate Let’s take the example of RCC slab reinforcement to calculate and prepare Bar Bending Schedule. Read More: Steel Quantity Calculation Excel Sheet How to Prepare Bar Bending Schedule
#Civil engineering formulas in urdu code
Refer to “IS:2502 Code of Practice for Bending and Fixing of bars” for further information. even though the angles are 45 degrees, 90 degrees,135 degrees, 180 degrees we will deduct only 2d for each bent). Note: Practically in the construction site we will be deducting only 2d for a single bend irrespective of the angle (i.e. Length=12m, Diameter=25mm, bent angle= 90 degree & no of bents are 2. Note: For n number of bends there should be n deductions in the original length to get the cutting length. So for one bend, it is deducted by 4d as it is 180 degrees bendĬutting Length = 12- 3d= 12- 4*0.025= 11.900 m. 180° Bend In Steelįor example, if the length of the bar is 12 m (assume), the diameter is 25 mm. Similarly for a 180-degree bend, the deduction is 4d. So for one bend, it is deducted by 3d as it is 135 degrees bend.Ĭutting Length = 12- 3d= 12- 3*0.025= 11.925 m.Ĥ.
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