40 Hour Property and Building Inspection Practice Test

Which of the following is NOT considered a common joist problem?

1. Joist running parallel to walls below

2. Inappropriate notching or holes

3. Sagging joists

4. Rot and insect damage

The correct answer is: Joist running parallel to walls below

The scenario of a joist running parallel to the walls below is generally not considered a common problem because, in many cases, this is an acceptable and standard installation practice. Joists can be aligned parallel to walls as part of the structural design and framing of a building, as long as they are properly spaced, sized, and supported. In contrast, inappropriate notching or holes can significantly weaken a joist and compromise its structural integrity, leading to potential failures. Sagging joists are a clear indication of overloading, deterioration, or poor installation, signifying a problem that needs addressing. Similarly, rot and insect damage present critical issues that can undermine the structural stability of the joists, resulting in serious consequences if left uncorrected. Thus, the reason one would identify the option of joists running parallel to walls below as not a common problem lies in its normality and acceptance in construction practices, contrasting with the other options that denote structural defects or signs of damage.