Walking and Working Surfaces Flashcards

What is the maximum riser height allowed on standard stairs in general industry?

Answer: 9.5 inches

Standard stairs must have uniform riser heights of no more than 9.5 inches.

Standard stair treads must have a minimum depth of how many inches?

Answer: 9.5 inches

Treads must be at least 9.5 inches deep, measured from front edge to back.

A ship stair (ships ladder) is permitted only when what condition applies?

Answer: When a standard stair is not feasible due to space

Ship stairs are allowed where the employer can show a standard stair is not feasible.

What minimum clear width must a standard stairway provide between vertical barriers?

Answer: 22 inches

Standard stairs must be at least 22 inches wide between vertical barriers.

Handrails and top rails used as handrails must be able to withstand a force of at least how many pounds?

Answer: 200 pounds

Handrails must withstand at least 200 pounds applied in any downward or outward direction.

What is the required vertical clearance (headroom) above stairways?

Answer: 6 feet 8 inches

Stairways must have at least 6 feet 8 inches of vertical clearance above any stair tread.

Openings in walking-working surface floors that a person could fall through must be guarded on all exposed sides except where?

Answer: At the entrance to a stairway or ladderway

Floor openings are guarded on all exposed sides except at the entrance to stairways or ladderways.