Champions School Home Inspection Practice Test 2026 – 400 Free Practice Questions to Pass the Exam

Drilled holes in floor joists are permitted in specific areas to maintain the structural integrity and load-bearing capacity of the joists. The correct answer highlights that holes can be placed in the outer third of the joist, specifically at a midway point from top to bottom. This restriction is based on engineering principles that dictate how loads are distributed within the joist.

Holes drilled in this area do not significantly compromise the joist's ability to support loads because the majority of shear and bending stresses occur in the central portion of the joist. Keeping the drilled holes to the outer third minimizes the impact on the joist’s structural integrity and ensures that it can carry the intended loads without risk of failure.

In contrast, the other options suggest locations where drilling may undermine the strength of the joist. For instance, if holes were located in the middle third of the joist, especially without restrictions as indicated in one option, this would likely interfere with the load-bearing capabilities and could lead to structural failure. Therefore, understanding the appropriate locations for drilling is critical for maintaining safety in building structures.