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Carpenter Red Seal Exam Prep · Question

A window opening in a non-load-bearing interior wall is 1500 mm wide. Which of the following headers is typically sufficient to frame this opening, according to standard Canadian practice?

For a non-load-bearing opening, the header primarily serves to maintain stud alignment and provide a nailing surface. A single 38x89 mm member on edge is common

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Question: A window opening in a non-load-bearing interior wall is 1500 mm wide. Which of the following headers is typically sufficient to frame this opening, according to standard Canadian practice?

Answer options:

  • Two 38x89 mm (2x4) members flat ✅ Single 38x89 mm (2x4) member on edge
  • Two 38x140 mm (2x6) members on edge
  • Single 38x140 mm (2x6) member flat

Correct answer: Single 38x89 mm (2x4) member on edge

Explanation: For a non-load-bearing opening, the header primarily serves to maintain stud alignment and provide a nailing surface. A single 38x89 mm member on edge is commonly sufficient for a 1500 mm opening in a non-load-bearing wall.

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