Bar Bending Schedule Maker for Indian Sites (IS 2502)

About the Bar Bending Schedule Maker for Indian Sites (IS 2502)

Make the bar bending schedule of a whole building: floors (with how many identical floors), the members on each floor — footings, columns, beams, slabs, stairs, walls — with how many identical members, and their bar marks. Each bar mark is worked out with the IS 2502 shape formulas, hook and bend allowances and cutting lengths to the next 25 mm, IS 456 laps where a bar is longer than a stock bar and IS 1786 masses, then multiplied by members and floors.

With a Premium pass you get the schedule floor by floor with a sketch of every bar shape, steel by diameter, floor by diameter and element, a kg per m³ check against the steel you planned, a cutting plan that packs each diameter’s pieces into 12 m stock bars with the offcuts it leaves, bar tags for the bundles, a schedule PDF on your letterhead and an Excel workbook with live formulas. Steel by diameter can be sent on to the material reconciliation statement. The free preview works on your own drawings: the first bar marks of each floor with their cutting lengths, numbers and weights, the first cutting patterns, and the documents as marked page images.

Common uses

• Site engineers making the BBS of a G+2 or G+4 building from the structural drawings.
• Contractors ordering steel by diameter and planning the cutting of 12 m bars.
• Bar-bending yards tagging bundles by member and floor.
• Quantity surveyors checking steel per m³ against the estimate.

Cutting lengths (IS 2502)

The lengths are those of the bar bending schedule calculator: measured along the centre line with the IS 2502 Table II hook allowance H and bend allowance B (internal radius 4d for TMT/HYSD bars, 2d for mild steel), L-bars A + E − ½R − d, U-bars with the same deduction at each bend, cranks + D·tan(θ/2) each, closed links 2(A + E) + 24d with 135° hooks, rings π(D + d) + 2H and helices N·π(D + d) + 8d. Cutting lengths go up to the next 25 mm (cl. 5.1.1). Bars longer than a stock bar get IS 456 cl. 26.2.5.1 laps (none above 32 mm: couplers are counted instead). Masses are IS 1786 Table 1 (0.395, 0.617, 0.888, 1.58, 2.47 and 3.85 kg/m for 8 to 25 mm) or D²/162.

Floors, members and totals

Each bar mark’s total number = number per member × identical members × identical floors. The schedule adds the bars, lengths and weights by diameter, by floor, by floor and diameter, and by element (footings, columns, beams, slabs, stairs, walls). Enter the concrete in one member to get the steel per m³ of each element and compare it with the figure you planned — from your estimate or the steel quantity calculator; a large difference often means a missing or doubled bar mark.

The cutting plan

Each diameter’s pieces are cut from stock bars (12 m unless you change it). A bar longer than a stock bar takes whole stock bars and a remainder; its laps are already in its cutting length. The other pieces are packed longest first, by first-fit and by best-fit, and the plan with fewer stock bars is kept. Every stock bar’s pieces form a cutting pattern — “24 bars: 3 × 3,650 mm, offcut 1,050 mm” — and offcuts at least as long as you set (1 m to start with) are listed as usable; the rest is scrap. You can allow for a blade loss at each cut. The plan is close to the fewest bars but not guaranteed to be the least possible, and offcuts of one diameter are not used for another.

Documents and workbook

The schedule PDF (A4 or A3 landscape, with your letterhead) lists every floor and member with a sketch of each bar, then the totals, the kg/m³ check, the cutting plan and prepared / checked signatures. Bar tags come eight to an A4 page with cut lines. The Excel workbook has the schedule with total bars, lengths and weights as formulas, the bar masses, the summaries by diameter, floor and element as SUMIF formulas, and the cutting patterns.

Sources

• IS 2502, Code of practice for bending and fixing of bars for concrete reinforcement — archive.org
• IS 1786, High strength deformed steel bars and wires for concrete reinforcement, Table 1 — archive.org
• IS 456, Plain and reinforced concrete, cl. 26.2 (development length and laps) — archive.org

Limitations

• A scheduling aid, not a structural design: bar sizes, spacings, laps and their positions come from the drawings and your engineer.
• Special shapes, other bend radii and seismic detailing (IS 13920) may need their own allowances: use the overrides of each bar.
• The cutting plan packs each diameter separately and does not reuse offcuts across diameters or jobs; with more than 20,000 pieces of one diameter it counts by length.
• Projects are kept in this browser on this device: download a backup to move them or keep them safe.

Privacy

On this device: nothing is sent

Projects, members and bars are kept in this browser’s storage on your device and never sent to MySmartCoPilot or anyone else. The PDFs and the workbook are made on the device.