Sentence 9.3.2.8.(1)

Intent 1:

To limit the probability of the failure to adjust spans for undersized joists, rafters, lintels or beams, which could lead to inadequate strength or rigidity, which could lead to an inability to resist expected gravity, lateral or wind uplift loads.

This is to limit the probability of:

• compromised structural integrity, or
• where lumber supports or is used in an environmental separator, the displacement or failure of required environmental separation elements, which could lead to the deterioration of building elements, which could lead to compromised structural integrity.

Where lumber supports or is used in floors, this is to limit the probability of excessive deflection or vibration of floors, which could lead to a loss of balance, tripping or falling, which could lead to harm to persons.