Back9.8.9.4.(2)

ATTRIBUTION:

Functional Statement:

F22

To limit movement under expected loads and forces.

Objective:

OH4

 

APPLICATION:

Maximum spacing of wooden stringers for stairs serving not more than one dwelling unit, where the risers support the front portion of the treads, 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:

Where the continuous support of the treads and the lesser loading due to the nature of the occupancy allow a greater span between stringers, to limit the probability of excessive space between stringers, which could lead to excessive springiness or excessive deflection of the stringers, which could lead to user anxiety.
To supersede the requirement stated in Clause 9.8.9.4.(1)(d) regarding the maximum distance between stringers, where the continuous support of the treads and the lesser loading due to the nature of the occupancy allow a greater span between stringers.

ATTRIBUTION:

Functional Statement:

F20

To support and withstand expected loads and forces.

Objective:

OS2.1

 

APPLICATION:

Maximum spacing of wooden stringers for stairs serving not more than one dwelling unit, where the risers support the front portion of the treads, 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:

Where the continuous support of the treads and the lesser loading due to the nature of the occupancy allow a greater span between stringers, to limit the probability of excessive space between stringers, which could lead to structural failure of the stringers, which could lead to harm to persons.
To supersede the requirement stated in Clause 9.8.9.4.(1)(d) regarding the maximum distance between stringers, where the continuous support of the treads and the lesser loading due to the nature of the occupancy allow a greater span between stringers.