Scaffold Foundation and Base Plates

Toolbox Talk Record

Ref: TBT-SCF-007  |  Issue: 1  |  Date: March 2026
PresenterProject
LocationDate

What?

Why?

Prevent collapseFoundation failure is the primary cause of catastrophic scaffold collapses.
Load distributionInadequate base plates cause point loading and ground failure.
Legal requirementWork at Height Regulations require scaffolds on suitable foundations.
Progressive failureOne settling standard creates uneven loading bringing down the scaffold.
Do Don't
  • Assess the ground conditions before erecting any scaffold structure.
  • Use base plates under every standard — no exceptions.
  • Place sole boards on soft ground to distribute the scaffold load evenly.
  • Ensure sole boards are timber of adequate size, level, and good condition.
  • Check that paved surfaces are adequately supported from below.
  • Inspect foundations before loading the scaffold and after bad weather.
  • Follow TG20 or the scaffold design for specific foundation requirements.
  • Level the base plates accurately to avoid uneven loading.
  • Drain standing water away from scaffold foundations to prevent softening.
  • Seek structural advice before erecting scaffold on suspended floors or roofs.
  • DON'T erect standards directly on bricks, blocks, or loose materials.
  • DON'T place base plates on frozen ground without assessing thaw settlement.
  • DON'T omit sole boards on soft ground, grass, or clay surfaces.
  • DON'T assume a hard surface means adequate bearing capacity underneath.
  • DON'T allow excavations to undermine scaffold foundations.
  • DON'T load a scaffold before foundations have been inspected and approved.
  • DON'T ignore signs of settlement such as leaning standards or cracked surfaces.
  • DON'T use damaged or undersized base plates or sole boards.
  • DON'T erect scaffold on sloping ground without levelling the base.
  • DON'T remove sole boards or base plates from a loaded scaffold.

See also: Scaffold Safety Awareness | Scaffold Inspection and Tagging