Sentence 9.3.2.2.(1)

Intent 1:

To limit the probability that inappropriate grades of visually graded lumber will be used, which could lead to compromised structural integrity of the visually graded lumber or of elements supported by the visually graded lumber, which could lead to excessive movement, deformation or failure under expected lateral, gravity 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.

This is to limit the probability of:

• the excessive deformation of walls, ceilings and roofs, and
• deflection or vibration of floors.

This is to limit the probability of negative effects on the psychological well-being of persons.