Prepare for success in carpentry with the Red Seal Carpenter Practice Exam. Sharpen your skills, tackle challenging questions, and boost confidence for the Red Seal certification.

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When should the bottoms of the cross bridging be fastened?

  1. Immediately while building floor so the floor is complete before sheathing.

  2. Once floor sheathing is complete because now joists have been nailed straight.

  3. Before the subtrades come in so they can not knock them out as easily.

  4. Just prior to drywalling so floor has had time to straighten and settle.

The correct answer is: Before the subtrades come in so they can not knock them out as easily.

Cross bridging should be fastened before the subtrades come in, to prevent them from knocking them out easily. Option A is incorrect because the cross bridging should be done after the floor is completed, not during. Option B is incorrect because if the joists were nailed straight, there would be no need for cross bridging. Option D is incorrect because drywalling should not be done until after cross bridging is completed.