Massachusetts Construction Supervisor License (CSL) Practice Test

Which option describes the correct attachment method for gypsum wallboard to wood framing in a single family dwelling?

1. Type W screws with 1/2" penetration

2. Type W or S screws with 5/8" penetration

3. Type W or S screws with 1/2" penetration

4. Type S screws with 1/2" penetration

The correct answer is: Type W or S screws with 5/8" penetration

The correct answer is based on the appropriate specifications for attaching gypsum wallboard to wood framing in a single-family dwelling. When using Type W or S screws, a penetration depth of 5/8" is necessary to ensure a secure attachment that maintains the integrity of the wall system. This depth allows the screw to fully engage with the wood framing, providing enough holding power to resist pullout and ensuring that the drywall is well-secured against shifts and movements. Type W screws are specifically designed for use with wood and are known for their sharp points and coarse threads, which are crucial for gripping the wood effectively. Type S screws are similarly effective, though they are designed for steel framing, but they also work well with wood if needed. The requirement for a 5/8" penetration reflects best practices in the industry to accommodate the thickness of standard wallboard and achieve optimal performance. In contrast, other options with 1/2" penetration are insufficient as they may not secure the wallboard adequately, which could lead to issues such as sagging or loosening over time, compromising the structural quality of the installation. Therefore, using Type W or S screws with the specified depth of 5/8" is critical for achieving a robust and reliable attachment method