Carpenter Red Seal Exam Prep · Question
When framing a two-story house, what is the purpose of installing 'rim joists' around the perimeter of the second-floor system?
Rim joists are installed perpendicular to the main floor joists around the perimeter of the floor system. Their primary function is to enclose the joist ends an
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Question: When framing a two-story house, what is the purpose of installing 'rim joists' around the perimeter of the second-floor system?
Answer options: ✅ To provide a continuous nailing surface for exterior sheathing
- To support interior partition walls on the second floor
- To create a fire-rated barrier between floors
- To form the top plate for the first-floor walls
Correct answer: To provide a continuous nailing surface for exterior sheathing
Explanation: Rim joists are installed perpendicular to the main floor joists around the perimeter of the floor system. Their primary function is to enclose the joist ends and provide a continuous, solid nailing surface for the vertical exterior sheathing.
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