THE C AREY C ABIN Rafter Diagrams 2x3 r idge beam
2x3 r idge beam
beam notch detail
31.5 deg.
3’-10¾” 3½” 3’-10¾” 1¾”
inter ior r after
ROOF There are two types of rafters: end and interior. The four end rafters are part of the front and rear wall frames. The number of interior rafters is based on the desired spacing; you’ll need three sets for approximately 24-inch spacing or five sets for approximately 16-inch spacing. The ridge beam is a single 2x3. You can leave the ridge with square edges or rip the top edges on a table saw to match the roof slope. In either case, notch the interior rafters to accept the ridge. The two end rafters at each gable do not get notches; the ridge butts into the inside faces of these rafters. Fasten the top ends of the rafters to the ridge beam by screwing through
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end r after 58.5 deg.
the outsides of the rafters and into the ridge. Screw the bottom ends of the rafters to the wall plates with one screw driven down through the rafter and into the wall stud or plate, and one opposing screw through the stud or plate and into the rafter. Alternatively, you can use steel framing connectors to fasten the rafters to the walls. Sheathe the roof with siding planks, plywood, or other material. If your roofing material requires fasteners between rafter locations, make sure the sheathing is thick enough so that the fasteners don’t poke through the bottom and into the cabin interior.
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