House Framing

House Framing Steps

Category Construction Glossary
House Framing Rafters

Rafters, as with ceiling joists, can be laid out on 16 or 24 inch on
center. If trusses are being used, the layout is normally 24 inch
on center. The rafter layout with regular lumber is commonly 16
inch on center. The dimensional size of the rafter will depend on
the span and
pitch of the roof. The width of the building as well
as overhang is used to determine the length of the rafter. There
can be many types of rafters in a roof depending on the type of
roof system. The building may consist of
common rafters, hip
rafters, valley rafters, jack rafters,  and barge rafters. Once the
rafter layout is complete and the rafters cut, the rafters are ready
to be installed. If trusses are being used there will be a specific
roof brace detail provided by the truss manufacturer. With
regular lumber, the roof bracing is a very important and essential
part of the roof system. Angle bracing is used to support the
rafters. Angle braces are never installed below a 45° angle.
Collar braces are installed below the ridge on the side of two
rafters on opposite sides of the building . There should also be
angle bracing supporting gable ends. Once the rafters are
installed and braced, the roof decking is ready to be installed.