General Contractor Practice Exam

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What is the maximum nail spacing allowed in 5/8 gypsum board with studs at 24 inches on center?

6 inches
8 inches
10 inches
12 inches

The correct answer is: 8 inches

When installing 5/8-inch gypsum board, the International Building Code (IBC) and other building standards provide guidelines for nail spacing to ensure structural integrity and proper performance. For gypsum board that will be attached to wood or metal framing, it is essential to adhere to these spacing requirements to prevent issues such as sagging or cracking. In this specific case, with studs spaced 24 inches on center, the maximum nail spacing allowed is 8 inches. This spacing helps distribute the load evenly across the surface of the gypsum board and maintains its durability over time. By ensuring that nails or screws are placed no further than 8 inches apart, the installation remains secure while still allowing for slight expansion and contraction of the materials. Adhering to the maximum nail spacing is vital for both performance and code compliance, as improper spacing can lead to aesthetic and structural failures, necessitating costly repairs or replacements. This standard is particularly relevant in areas with specific building codes or where fire resistance is critical, emphasizing the importance of following established installation practices for gypsum board.