Massachusetts Construction Supervisor License (CSL) Practice Test

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Prepare for the Massachusetts Construction Supervisor License Test with engaging multiple choice questions, hints, and detailed explanations. Boost your knowledge and confidence to ace your exam!

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What is the maximum allowed span of a 2x8 floor joist made of Spruce-Pine-Fir, #3 grade, spaced 16" O.C., with a dead load of 10 psf, in a bedroom of a single family dwelling?

8 ft. 4 in.
10 ft. 8 in.
12 ft. 0 in.
9 ft. 6 in.

The correct answer is: 10 ft. 8 in.

The maximum allowed span of a 2x8 floor joist made of Spruce-Pine-Fir, #3 grade, spaced 16" on center with a dead load of 10 psf in a residential setting is determined by considering both the material properties and the loading conditions. For #3 grade Spruce-Pine-Fir, building codes and span tables provide guidelines on the appropriate spans for various conditions. Generally, a 2x8 joist spaced at 16 inches on center is capable of spanning a certain distance under specified loading conditions. In this case, a dead load of 10 psf is relatively light, which allows for a longer span. When consulting span tables, you'll find that these joists can safely span up to 10 feet 8 inches for this combination of size, spacing, grade, and load. This makes it suitable for the requirements of a floor in a bedroom of a single-family dwelling, where the load factors are not excessively high. Thus, the correct span of 10 feet 8 inches aligns with the permissible limits provided by the relevant building codes and design standards for residential construction, particularly for floor framing.