Bar bending Schedule #BBS #civilengineering #construction

Information Included in BBS Member name (beam, column, slab, footing) Bar mark Diameter of bar (mm) Shape of bar Length of bar Number of bars Total length Weight of steel Standard Diameter of Reinforcement Bars Bar Diameter (mm) Use 6 mm Stirrups, ties 8 mm Slabs 10 mm Slabs, beams 12 mm Beams 16 mm Beams, columns 20–32 mm Columns, footings 5. Unit Weight of Steel Bar Formula: Weight (kg/m) = 𝐷 square by 162 Weight (kg/m)= Diameter (mm) Weight (kg/m) 6 0.22 8 0.39 10 0.62 12 0.89 16 1.58 20 2.47 25 3.86 Bending Allowance (IS 2502) 45° bend → 1D 90° bend → 2D 135° bend → 3D 180° bend (hook) → 4D (D = Diameter of bar) Hook Length Tension bar hook = 9D Stirrups hook (135°) = 10D Types of Reinforcement Bars Mild Steel (Fe 250) HYSD bars (Fe 415, Fe 500, Fe 550) TMT bars (commonly used) Common Bar Shapes Straight bar L-bar U-bar Crank bar Stirrups Bent-up bars Example of Bar Bending Schedule Bar Mark Dia (mm) Length (m) No. Total Length (m) Weight (kg) B1 12 5.2 6 31.2 27.8 S1 8 1.5 20 30 11.7