BBS

Bar Bending Schedule

// Reinforcement Estimation & Cutting Optimiser

A professional BBS tool for infrastructure engineers. Build detailed reinforcement schedules, auto-calculate bar weights, and minimise steel waste with first-fit decreasing cutting-stock optimisation.

Open BBS Tool →My Projects

Features

Auto-Calculations

Unit weight, bar length, total bars, and total weight — all derived automatically from your inputs.

6 Shape Types

Straight, L-bend, U/C, Crank (Z), Stirrup, and Custom up to 6 segments — each with SVG preview.

Cutting Optimisation

First-Fit Decreasing bin-packing per diameter. Offcuts ≥ 500 mm reused. Utilisation % visualised.

Excel & JSON Export

Download your full BBS as a formatted Excel workbook or portable JSON for re-import.

Cloud Save

Save unlimited projects to your account. Organised by client and project name.

Print Ready

A4-friendly print stylesheet covering the full BBS table and cutting plan.

Reference Formulas

Unit Weight → U = ø² ÷ 162 (kg/m)

Bar Length → L = Σ(segments) + Bend Deduction

Bend Deduction (90°) → BD = −2 × ø × n_bends

No. Bars each → n = floor(Length_of_Area ÷ Spacing) + 1

Total Weight → W = U × (L ÷ 1000) × Total_Bars (kg)