Question 1
Domain 5: Roof-Ceiling Construction and Attic AssembliesAccording to the IRC, how must roof rafters be connected to the top plate of the wall?
Correct answer: B
Explanation
The IRC requires roof rafters to be secured to the wall top plate using approved connections that resist uplift and lateral loads. That means "approved framing anchors, metal connectors, or nailing per the fastening schedule" are acceptable because they provide the required structural attachment between the rafter and top plate.
Why each option is right or wrong
A. Gravity alone is sufficient
B. With approved framing anchors, metal connectors, or nailing per the fastening schedule
IRC Section R802.11 requires roof framing members to be connected to the supporting wall plate with approved connectors or equivalent fastening methods, and the connection must be capable of resisting the design uplift and lateral loads. In practice, that means the rafter-to-top-plate attachment must be made with approved framing anchors, metal connectors, or nailing that complies with the fastening schedule in the code tables, rather than an unspecified or loose connection.
C. Only with hurricane straps in all climate zones
D. With adhesive and screws