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9.34.2.3.(2) | Application | Intent |
| OS3 |
| Objective | OS3 Safety in Use |
| Attribution | |
| Application | Application 1: Provision of 3-way wall switches controlling lighting
outlets for stairways with 4 or more risers, in dwelling
units, in buildings to which Part 9 applies
[see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Exceptions:
except as stated in Sentence 9.34.2.3.(3), which applies tobasements that do not contain finished space or do not
lead to an outside entrance or built-in garage, and that serve not more than
one dwelling unit.
Application 2: This also applies to buildings of residential occupancy to which Part 3 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 3], as stated in Sentence 3.2.7.1.(3). |
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| Intent | Intent 1: To limit the probability that persons will be unable to
control stairway lighting from both the bottom and top of stairs, which could
lead to inadequate lighting of stairways, which could lead to persons being
unable to see stairs, which could lead to persons tripping or falling, which
could lead to harm to persons. |
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