Back9.8.9.5.(1)

ATTRIBUTION:

Functional Statement:

F22

To limit movement under expected loads and forces.

Objective:

OH4

 

APPLICATION:

Minimum thickness of stair treads made of lumber, plywood or O-2 grade OSB for stairs within dwelling units, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
This also applies to stairs within dwelling units, in buildings to which Part 3 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 3], as stated in Sentence 3.3.4.7.(1).

INTENT:

To limit the probability of inadequate thickness, which could lead to excessive springiness or excessive deflection of stair treads, which could lead to user anxiety.

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

Objective:

OS2.1

 

APPLICATION:

Minimum thickness of stair treads made of lumber, plywood or O-2 grade OSB for stairs within dwelling units, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
This also applies to stairs within dwelling units, in buildings to which Part 3 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 3], as stated in Sentence 3.3.4.7.(1).

INTENT:

To limit the probability of inadequate thickness of stair treads, which could lead to structural failure, which could lead to harm to persons.