Module 4 of 7
From Drawing to Bar Bending Schedule
Convert drawing callouts into bar marks, cutting lengths and a defensible BBS: beam elevations, stirrup schedules, layered raft callouts, curtailment rules, slab schedules and the site checks that prove the steel matches the sheet.
After this module you can
You can decode any rebar callout — both T-notation and diameter-inch notation — compute cutting lengths with hook and bend allowances, and check fixed steel against the drawing before a pour.
- 4.1 Rebar Callouts Decoded: T16@200 C/C and FriendsEvery rupee of reinforcement is ordered off a short text string like 3-T25(TH) or T16@200C/C. Learn the full grammar — counts, qualifiers, zone letters, layers — in both dialects used on Indian sites, from real project sheets.8 min read
- 4.2 Cutting Lengths from Sections and DetailsThe cutting length column is where BBS disputes are won or lost. Read the typical bending, curtailment and lap details that fix every length — then compute two real examples, including a 600 mm lap that is exactly 50d.7 min read
- 4.3 Slab and Raft Reinforcement, Drawing to BBSA six-cell table row can hide a floor's worth of steel. Turn a real Schedule of Slab into a priced bar list for one panel, then read the raft alternate-bar convention that halves or doubles quantities when misread.7 min read
- 4.4 Checking Steel on Site Against the DrawingThe drawing is the contract; the pour makes it permanent. A 20-minute pre-pour routine — dia, count, spacing, cover, laps, hooks, trimmers — with the numbers that turn 'looks fine' into evidence.7 min read