Rise, Run, Tread, Nosing, and Width of a Stairway
The tread depth is measured horizontally between the vertical planes of the foremost projection of adjacent treads and at a right angle to the tread’s leading edge. The greatest tread depth …
Inspecting Stair Stringers - InterNACHI
Some stair stringers may be sistered with 2x4-inch boards in order to strengthen a 2x10-inch stringer that has only 3-1/2 inches of board remaining beneath the tread-riser notch. An …
General checklist for inspecting stairways and sample reporting ...
2008年2月10日 · Each tread should have at least a 7 1⁄2 inch tread depth at 12 inches from the narrower edge. CA: For spiral stairs, all treads should have minimum run not less than 150 …
InterNACHI's advanced tips for inspecting stairways and sample ...
2008年2月10日 · Make sure the tread depth is at least 10 inches. For spiral stairs, all treads should be identical. Each tread should have at least a 7 ½ inch tread depth at 12 inches from …
Cut Stringer Throat - Inspection Gallery - InterNACHI
The throat depth is the net depth of a stringer once the steps are cut and removed, and it is measured from the step perpendicular to the bottom edge of the stringer. These tread and …
Stairway Rise and Run - Inspection Gallery - InterNACHI
Stairway Rise and Run: The stairway riser height maximum is 7 and 3/4 inches (196 mm). That is measured vertically between the leading edges of the adjacent treads. The tread depth must …
"stairs" Search Results - Inspection Gallery - InterNACHI
InterNACHI® can help you get licensed in your state or province, and provides certification to help you stand out from the crowd.
Inspecting a Deck, Illustrated - InterNACHI
Stair stringers shall be made of 2"x 12" lumber at a minimum, and no less than 5 inches wide at any point. The image above depicts deck stair stringers. Stringers should be no more than 16 …
Stair Guard Opening Limitations - Inspection Gallery - InterNACHI
Stair Guard Opening Limitations: According to the IRC®, the triangular opening at a guard at the open side of a stair formed by the riser, tread, and bottom rail of a guard must not allow a …
Riser Height and Tread Depth - Inspection Gallery - InterNACHI
Riser Height and Tread Depth: In commercial buildings, the height of risers must be between 4 inches and 7 inches, and the tread depth must be at least 11 inches for each step.