Sentence 9.4.3.1.(1)

Intent 1:

To limit the probability of the excessive deflection of structural members.

This is to limit the probability of:

• for roof framing, rainwater ingress, and
• for roof framing, ceiling joists or floor framing supporting air barrier materials, vapour barriers or insulation, the displacement or failure of these elements, which could lead to condensation.

This is to limit the probability of deterioration, which could lead to compromised structural integrity of roofs, walls or floors, or of elements supported or protected by roofs, walls and floors, which could lead to structural failure, which could lead to harm to persons.