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Interior Design Professional Practice Exam

Category - Interior Design Practice Exam

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Often times plumbing or wiring or different types of tubing may need to go through framing joists.What is the rule for determining the largest side of hole, notch or cut in a joist? No hole should be more than ___ of Joist Depth

One Half
One Third
One Fifth
One Quarter

Explanation

Answer: B - One Third
No Hole, notch or cut should be more than one-third of joist depth. This help retain the strength of the joist.

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