The bar bending schedule (BBS) tabulates every bar by mark number, standard shape code, size, dimensioned lengths, cutting length, number and total weight. IS 2502's standard shapes/codes make the BBS unambiguous so the steel can be cut, bent and fixed reproducibly, checked on site, and estimated for procurement. The BBS is the control document that connects the drawing to the steel.
Key Requirements
•Each bar: mark no., standard shape code, bar size, dimensioned lengths, cutting length, count, weight
•Use the standard IS 2502 shape codes so the bender/fixer reads the same shape the detailer intended
•Cutting lengths per the bend-deduction clause; hooks per the hook clause
•BBS is approved before fabrication; site fixing is checked against the BBS
•Total weights from the BBS feed steel procurement/estimation
Practical Notes
✓A correct, approved BBS is the single biggest reinforcement-quality and cost-control lever — it makes cutting/bending/fixing reproducible and auditable.
✓Most reinforcement disputes (short bars, wrong shapes, quantity overruns) are BBS-quality problems, not fabrication problems.
Common Mistakes
⚠Fabricating without an approved BBS (no reproducibility or check).
⚠Non-standard shape notations the bender misreads.
⚠BBS quantities not reconciled with site fixing / procurement.