Above and Below

Question 1

Headroom Above Stairs
Q: How is stairway headroom measured?

Answer 1

A: It is measured vertically from:
- The sloped plane adjoining the tread nosing OR
- The floor surface of the landing or platform.

Question 2

Headroom Above Stairs
Q: What is the minimum required headroom in a stairway in the US?

Answer 2

A: At least 6 feet, 8 inches.

Question 3

Headroom Above Stairs
Q: What is the minimum required headroom for spiral stairways in the US?

Answer 3

A: At least 6 feet, 6 inches.

Question 4

Inspection Below Stairs
Q: What protection is required for enclosed, accessible spaces under stairs in the US?

Q: What additional issues should be inspected below stairs in both the US and Canada?
A: Look for mold and insect infestation damage.

Answer 4

A: They must be protected on the enclosed side with 1/2-inch gypsum board.

Question 5

Inspection Below Stairs
Q: What should be checked at the bottom of the stair stringer boards in both the US and Canada?

Answer 5

A: Inspect for water damage.

Question 6

Inspection Below Stairs
Q: What additional issues should be inspected below stairs in both the US and Canada?

Answer 6

A: Look for mold and insect infestation damage.

Question 7

Ground Contact & Wood Protection
Q: What are the US requirements for wooden stair components in contact with the ground?

Answer 7

A: They must be made of approved pressure-preservative-treated wood suitable for ground-contact use.