9.8.9.5.(2)ATTRIBUTION:
Functional Statement:
F22
To limit movement under expected loads and forces.
Objective:
OH4
APPLICATION:
Orientation of the face grain of stair treads made
of plywood or OSB that are not continuously supported by the riser, 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 that stair treads spanning in the
weak direction of the material will lead to excessive springiness or excessive
deflection, which could lead to user anxiety.
ATTRIBUTION:
Functional Statement:
F20
To support and withstand expected loads and forces.
Objective:
OS2.1
APPLICATION:
Orientation of the face grain of stair treads made
of plywood or OSB that are not continuously supported by the riser, 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 that stair treads spanning in the
weak direction of the material will lead to structural failure, which could
lead to harm to persons.