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Carpenter Red Seal Exam Prep · Question

What is the standard Canadian building code requirement for the minimum bearing length of a floor joist on a wood beam or sill plate?

The National Building Code of Canada (NBC) typically specifies a minimum bearing length of 90 mm for floor joists on wood beams or sill plates to ensure adequat

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Question: What is the standard Canadian building code requirement for the minimum bearing length of a floor joist on a wood beam or sill plate?

Answer options:

  • 38 mm
  • 50 mm
  • 75 mm ✅ 90 mm

Correct answer: 90 mm

Explanation: The National Building Code of Canada (NBC) typically specifies a minimum bearing length of 90 mm for floor joists on wood beams or sill plates to ensure adequate support and prevent crushing of the lumber under load. Shorter bearing lengths would not provide sufficient support.

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