Scaffolding shall have a top guardrail and mid-rail installed on all open sides and
ends when the working platform is at a height of 1.8 m (6 ft.) or greater and when
there is an open gap of 360 mm (14") between the work platform and the adjacent
structure (work point). A toeboard shall be provided when the work platform is at a
height ≥3 m above the base level unless or as required by the HA/JSA based on the
risk assessment.
13. The top guard rails shall have an equivalent strength of scaffold tube and shall be
positioned between 950 mm – 1.15 m above the work platform surface with a midrail
470 mm above the top of the toeboard. Toeboards shall have a minimum height of
150 mm. Guardrail stantions (verticals) shall be spaced at a maximum of 2.7 m center
to center.