Final answer:
The statement regarding the limitation of the length of notches in solid lumber to not exceed one-third the depth for maintaining structural integrity is true. This is a fundamental building practice to prevent potential structural failures.
Step-by-step explanation:
The statement is true: Notches in solid lumber joists, rafters, and beams should not be longer than one-third the depth of the member. This guideline is part of standard building practices to ensure structural integrity. When notches are cut too deep, they can weaken the framing member, potentially leading to structural failures. Notching should be done with care, and it is important to follow the one-third rule to maintain the strength of the wood. It is also essential to place notches in the correct location on the member, typically towards the ends rather than the middle, where bending moments are lower.