QUESTION

What is the correct ladder dimension?

Std Dwg S1 states first rung in manhole to be no more than 650mm from finished top of manhole frame (150mm rung to barrel, risers max 500mm).

WorkSafeBC G13.2(1)(b) Ladders in manholes - "The maximum distance down from the entry level (rim of the manhole cover) to the centerline of the first rung below entry level in any manhole should be 500 mm (20 inches) where no handhold is provided above the first rung. Where a handhold is provided between the entry level and the first rung, the maximum distance may be increased to not more than 660 mm (26 inches)."

COMMENT

Review Std Dwg S1 with respect to conformance to WorkSafeBC.