Red Seal Carpenter Practice Exam 2025 – All-in-One Resource to Master Your Certification!

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What happens to the rafter layout at the ridge when lapped ceiling joists are attached to central bearing walls?

The rafters butt into the ridge directly opposing each other.

The rafters are butted to one another at the ridge.

The rafters are offset directly opposite the ceiling rafters below them.

When lapped ceiling joists are attached to central bearing walls, the rafters are offset directly opposite the ceiling rafters below them to create a consistent load path and support both the roof and ceiling structure effectively. This layout allows the rafters to be aligned in such a way that they do not interfere with the lapped joists while still providing the necessary structural integrity.

Offsetting the rafters helps distribute the loads more evenly and minimizes the chances of any conflicts at the ridge, where they meet. It ensures that the ceiling joists can bear their loads while the roof structure remains stable and well-supported. Thus, this arrangement is crucial for maintaining the overall strength and stability of the building's framing system, as it allows for proper load transfer from the roof down through the rafters and into the walls without adding unnecessary stress or points of weakness.

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The rafters are laid out the same as the ceiling joists below them.

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