01 — Input Parameters
Meets requirement (As ≥ As,req)
Within 15% below requirement
★ Optimal (minimum area that satisfies)
02 — Cross-Sectional Area of N Bars (mm²)
03 — Cross-Sectional Area per Metre Width (mm²/m)
| Ø (mm) |
50 | 75 | 100 | 125 | 150 |
175 | 200 | 225 | 250 | 275 |
300 | 350 | 400 | 450 | 500 |
Area per metre = (π × Ø² / 4) × (1000 / spacing) — spacing in mm
04 — Reinforcement Bar Properties & Weight per Metre
| Ø (mm) |
Area (mm²) |
Unit wt (kg/m) |
@50mm (kg/m²) |
@100mm (kg/m²) |
@125mm (kg/m²) |
@150mm (kg/m²) |
@200mm (kg/m²) |
@250mm (kg/m²) |
@300mm (kg/m²) |
Unit weight = ρsteel × A = 7850 kg/m³ × (π × Ø² / 4) × 10⁻⁶ | Weight per m² = unit weight × (1000 / spacing in mm)