Question 1

How do I size riser height and tread depth?

Accepted Answer

Divide total rise by the number of risers for riser height and use a comfortable tread depth so the run fits your space. Common guidelines: riser ~7 to 7.75 in, tread ~10 to 11 in.

Question 2

What is the 2R+T rule?

Accepted Answer

A comfort rule of thumb: 2 x riser height + tread depth ~ 24-25 inches.

Question 3

How many steps do I need?

Accepted Answer

Steps (risers) = ceil(total rise / target riser height). Recompute exact riser height = total rise / steps.

Question 4

What headroom do I need?

Accepted Answer

Typical minimum headroom is about 6 ft 8 in (verify local code).

Question 5

Do I need landings or winders?

Accepted Answer

Long runs or turns require landings or winders; check code for minimum landing size and handrail rules.

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