Massachusetts Construction Supervisor License (CSL) Practice Test

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What size nails are required for nailing ceiling joists to a top plate in a single family dwelling?

10d nails
8d nails
12d nails
16d nails

The correct answer is: 8d nails

The requirement for nailing ceiling joists to a top plate in a single-family dwelling typically calls for 8d nails. This size nail is well-suited for securing lightweight framing components, like ceiling joists, to a top plate, providing adequate holding power while being manageable in length and driving ease. In the context of framing, 8d nails are 2.5 inches long and are commonly used in various construction applications, including attaching wood members in light-frame construction. Using nails that are too long, such as 10d or 16d, could lead to potential issues such as splitting of the wood, while nails that are too short, like 6d, may not provide enough strength for the connections needed in the structure. Overall, the choice of 8d nails balances strength and practicality for this specific application.