CSLB Class B General Contractor's License Practice Exam

When drilling into a load-bearing stud, what action should be taken?

1. Support must be left in good function

2. The support must be doubled (2" hole in 2x4)

3. The amount drilled is determined by stud length

4. Drill at an angle

The correct answer is: The support must be doubled (2" hole in 2x4)

When drilling into a load-bearing stud, it is crucial to maintain the structural integrity of the stud, as it plays a vital role in supporting the weight of the structure. The correct approach, which involves ensuring that the support is not compromised, includes doubling the support when making significant alterations like drilling a 2-inch hole in a 2x4. When large holes are drilled into load-bearing components, they can weaken the stud, potentially leading to structural failure or sagging over time. Doubling the stud provides additional strength and maintains the load-bearing capacity necessary for safety. This practice is particularly important when dealing with critical structural elements that must carry loads. Drilling at an angle may not necessarily provide any additional support and could compromise the stud further depending on how it is done. The length of the stud does not directly determine the amount drilled in terms of acceptable practice since load-bearing considerations are primarily focused on the diameter and location of the hole rather than just the stud length. It’s important to leave sufficient material around any drilled hole for the stud to function effectively. Therefore, ensuring adequate support by doubling is essential for maintaining safety in construction practices.