Global Settings
Used to derive theoretical weight. Default is 7850 kg/m³.
Switch between price per kilogram or per length in Global Settings.
Quick Bar Count (spacing)
Helper
m
m
m
n = ⌊(run − 2·cover)/spacing⌋ + 1
Enter values then click “Count Bars”.
Cutting List
| # | Mark | Shape | Qty | Diameter | Run length | Hook A | Hook B | Lap | Waste | Bar length | Weight/bar | Total weight | Cost | Notes | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Totals | 0 | — | 0 | 0 | |||||||||||
Hook uses multiplier ×db (bar diameter). Defaults: 90°=12db, 135°=9db (adjust per local code).
Lap also in ×db, applied once per bar.
Stock-Length Cut Optimization
m
Typical: 12 m (or 40 ft).
m
Allowance added between pieces on the same stock.
m
Remainders smaller than this are treated as waste.
Run optimization to see the cutting plan.
| Stock # | Pieces (sequence) | Used length | Waste | Yield |
|---|
Formulas Used
- Weight per meter (kg/m):
w = (π·d²/4)·ρwithdin meters and steel densityρin kg/m³. - With
ρ ≈ 7850anddin millimeters:w ≈ 0.006165 · d2(kg/m). - Bar length:
L = run + hookA + hookB + lap + waste. - Hooks/Laps: input as multiples of bar diameter
(db); e.g., 90° hook ≈12·db, 135° hook ≈9·db. - Quick Count for spacing:
n = ⌊(run − 2·cover)/spacing⌋ + 1.
These are typical industry formulas; verify local code requirements and project specifications.
How to Use
- Choose unit system and pricing basis; optionally set density and grade.
- Use Quick Bar Count to calculate quantity from run, cover, and spacing.
- Build your cutting list: add rows and enter quantity, mark, run length, and diameter.
- Add hook and lap multipliers in
×db; add extra waste if needed. - Open Stock-Length Cut Optimization, set stock length, kerf, remainder, then run.
Tips: switch units at any time; all values are recalculated automatically.
Example Cutting List (sample)
| Mark | Shape | Qty | Diameter | Run | Hook A | Hook B | Lap | Waste | Notes |
|---|---|---|---|---|---|---|---|---|---|
| B1 | Straight | 20 | 16 mm | 5.8 m | 12×db | 12×db | 0 | 0.05 m | Main slab bars |
| B2 | L‑hook | 12 | 12 mm | 2.6 m | 12×db | 0 | 0 | 0.02 m | Beam starters |
| B3 | Stirrup | 40 | 10 mm | 1.0 m | 9×db | 9×db | 0 | 0.01 m | Closed ties |
FAQs
Switch between metric and imperial. Inputs and outputs update instantly, including diameter lists, units, and totals.
Weight per meter is derived from bar cross‑sectional area and steel density. For convenience, the constant 0.006165·d² (d in mm) is used widely.
Defaults are 90°≈12db and 135°≈9db, but always confirm with local codes, drawings, and engineer instructions for development and anchorage lengths.
Yes. Toggle the pricing basis in Global Settings, then enter your unit price accordingly. Costs update for each line and overall totals.
It shows the count and can append a new cutting-list line with the computed quantity and selected diameter if you choose to import.