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Installation and Use
Requirements for guardrail systems:
MAXIMUM permitted roof pitch is 1/12 (5°).
Toprails must be 42” (+/- 3”) above the work surface or, if used in stilt work applications, 42” plus the height
of stilts.
Midrails must be installed halfway between the top edge of the guardrail system and the working level (not
the toeboard).
All intermediary rails (not the toprail or the midrail) must not allow for gaps greater than 19”.
Toeboards are REQUIRED on roofs of slopes more than 4/12 (vertical/horizontal).
Toeboards are REQUIRED if a risk exists for tools, equipment, materials, or other substances to fall down to a
lower level.
Toeboards must be a minimum 3½” from their top edge to the working surface, and must not have greater
than ¼” clearance between their bottom edge and the work surface.
