Mostly for small house construction, the reinforcement will be calculated just based on the thumb rule. The excess procured steel will be used for other works.
But for a large-scale project, the tedious BBS schedule will be prepared to avoid the unnecessary wastages.
Bar bending shape codes are the cutting length formula used to avoid unnecessary cut wastes on reinforcement.
Advantages of using BBS codes in BBS Schedule
Bar Bending Shape | Cutting Length of Bar |
L = A | |
L = A+B-0.5r-d | |
L = A+B+C-r-2d | |
L = A+B+C-r-2d | |
L = 2(A+B)-2.5r-5d+Hook | |
L = A-3.2D+2Hook | |
L = A+B+2Hook | |
L = A+B+C+D-2r+Hook | |
L = A+B+C | |
L = Cπ(d-A) A-Spacing C-Nos of turns | |
L = A | |
L = A+C | |
L = A+B+C | |
L = A+B+C+D+E | |
L = A+C+D | |
L = A+B+C+D-0.5r-d | |
L = A+B+C+D+E | |
L = A+B+C+D-1.5r | |
L = A+B+2C-2.5r | |
L = 2A+2B-2.5r+2Hook | |
L = A |
Nominal Size of Bar (d) | Minimum Radius for Scheduling (r) | Minimum Diameter of Bending | General (min 5d straight), including links where bend >150⁰ | Links Bend <150⁰ |
6mm | 12 | 24 | 110 | 110 |
8mm | 16 | 32 | 115 | 115 |
10mm | 20 | 40 | 120 | 130 |
12mm | 24 | 48 | 125 | 160 |
16mm | 32 | 64 | 130 | 210 |
20mm | 70 | 140 | 190 | 290 |
25mm | 87 | 175 | 240 | 365 |
32mm | 112 | 224 | 305 | 465 |
40mm | 140 | 280 | 380 | 580 |
50mm | 175 | 350 | 475 | 725 |
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View Comments
Very Good Guidance for The Preparation Bar Bending Schedule and Rebar Fabrication Works.
Excellent.. Love the easiness you provided for bbs..