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4.1.6.2.(8)
OS2OP2OS2OP2
ObjectiveOS2 Structural Safety
Attribution
[F20-OS2.1] Applies to portion of Code text: “The shape factor, Ca, shall be 1.0, …”
Application
Application 1: 
Shape factor for calculating the specified snow load on areas of roofs subject to snow accumulation.
Exceptions: 
except as stated in Clauses 4.1.6.2.(8)(a) to 4.1.6.2.(8)(e), which apply to other areas of roofs where increased and non-uniform snow accumulation occurs due to roof configuration.
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A and to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9] that are required to be designed in accordance with the requirements of Part 4.
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Intent
Intent 1: 
To limit the probability that the shape factor will not take into account the roof configuration affecting the maximum expected accumulation of snow on roof areas, which could lead to structural failure, which could lead to harm to persons.
Intent 2: 
To limit the probability that the value of the shape factor used for roof areas will be less than 1.0 where not warranted, which could lead to structural failure, which could lead to harm to persons.
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