Inputs
All fields are required unless marked optional.
Example Data
Use Load Example to populate inputs with these values, then press Calculate.
| Parameter | Value | Notes |
|---|---|---|
| Unit system | Metric | Outputs always shown in whole couplers |
| Run length | 24 m | Façade length |
| Overall height | 12 m | From ground to top lift |
| Bay length | 2.5 m | Standard spacing along length |
| Lift height | 2.0 m | Ledger spacing vertically |
| Boarded lifts | 3 | Working platforms |
| Transoms per bay | 2 | Each transom uses two single couplers |
| Guardrail lines per boarded lift | 2 | Top and intermediate |
| Guardrail sides | Outside only | 1 side |
| Bracing pattern | Every 5 bays × every 2 lifts | Swivels = 2 per brace |
| Returns / corners | 1 | Allowance doubles per lift = 2 |
| Stock tube length | 6 m | For sleeve estimate |
| Wastage | 5% | Applied and rounded up |
Results
Bays
—
Lifts
—
Standards total
—
Guardrail runs
—
| Fitting | Count (base) | With wastage | Notes |
|---|---|---|---|
| Press Calculate to generate results. | |||
| Total all couplers | — | — | |
Disclaimer: Planning aid only. Site-specific design, supplier catalogues, and local codes prevail.
Formulas Used
- Bays:
ceil( length / bay_length ) - Lifts:
ceil( height / lift_height ) - Standards total:
2 × (bays + 1) - Right‑angle (double) for ledgers:
2 × (bays + 1) × lifts(inside + outside ledgers fixed at each standard) - Guardrail doubles:
guardrail_lines × guardrail_sides × (bays + 1) × boarded_lifts - Putlog (single) for transoms:
transoms_per_bay × bays × boarded_lifts × 2(two ends) - Façade braces:
ceil(bays / X) × ceil(lifts / Y); swivel couplers = braces × 2 - Corner doubles allowance:
returns × corner_doubles_per_lift × lifts - Sleeve couplers (joints):
- Standards:
(ceil(height / stock_len) − 1) × standards_total - Ledgers:
(ceil(length / stock_len) − 1) × 2 × lifts - Guardrails:
(ceil(length / stock_len) − 1) × guardrail_lines × guardrail_sides × boarded_lifts
- Standards:
- Wastage: Apply
ceil(value × (1 + wastage%/100))per line item.
How to Use
- Select your unit system and enter length, height, bay length, and lift height.
- Specify boarded lifts, transoms per bay, and guardrail configuration per boarded lift.
- Define bracing frequency, corner count, and any corner double‑coupler allowance per lift.
- Enter your stock tube length to estimate sleeve couplers at joints.
- Choose a wastage allowance. Click Calculate to generate counts.
- Use Download CSV or Download PDF to export a shareable summary.
Tip: For multi‑return façades, run the calculator per elevation and sum results.
FAQs
No. Tie patterns are project‑specific. Add right‑angle or swivel couplers separately per engineer’s tie schedule.
Corners vary. This tool adds a configurable double‑coupler allowance per lift. For complex wraps, calculate each elevation and combine.
It assumes joints occur when members exceed stock tube length. Real layouts, splices, and supplier lengths will affect actual sleeve counts.
This version uses the same guardrail lines for each boarded lift. Run multiple scenarios if different lifts use different guardrails.
No. The “transoms per bay” setting covers the main boarded lifts only. Add accessories separately.
This calculator targets tube‑and‑coupler. System scaffolds use proprietary rosettes or wedges; counts are different and should follow manufacturer data.