Scaffold duty loads
Independent scaffolds are often designed to a duty class (light, general, heavy, special) expressed as a distributed load in kN/m². Bay capacity ≈ duty × plan area.
Scaffold Bay Load Calculator
Scaffold · bay distributed load
Estimate allowable distributed bay load from TG20-style duty (kN/m²) × plan area. Not a scaffold design certificate.
Formula: Allowable load (kN) = Duty (kN/m²) × Bay area (m²)
- Point loads need separate checks.
- Incomplete or untied scaffolds must not be loaded.
- Follow TG20 / manufacturer data for design.
Frequently asked questions
Is this a TG20 design?
No — it is a quick capacity estimate. Use TG20 / manufacturer data and a competent scaffolder for design.
Point loads?
Concentrated loads (pallets, hop-ups) need separate checks — distributed duty is not enough.
Boards and fittings?
Assume the erected system matches the duty. Damaged or incomplete scaffolds must not be loaded.
People and materials?
Duty classes already assume mixed use within limits — do not stack beyond the design.
