Gable Roof Rafter Spacing

Total roof width with rake overhangs.

Gable roof rafter spacing.

Framing a gable roof building a gable with barge end purlin struts and collar ties. As a general rule roofs that have a high human occupancy rate should be framed with rafters every 16 structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes. That means it can span a total length of over 26 for a gable roof. Gable roof framing calculator plan diagram with full dimensions for a good straight fascia add an extra inch or 2 to the tails of all your rafters total length.

The same concept holds true for roof trusses. There is no standard spacing it depends on what size of rafters you want to use and the span of your shed. An essential part of planning a patio roof or gazebo project is determining the number size and spacing of rafters beams and posts according to the loads they will carry. Maximum rafter spans for a patio roof in areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.

For standard shed roof rafter spacing see rafter span chart. That rafter outside forms the overhang for the barge boards to fix to and so the soffit boards and ventilation are continuous all the way. Use the saltbox roof to calculate a two sided roof with different slopes spans and or overhangs for each side of the roof. Total rafter length with overhang.

Total rafter lumber length. Can span up to 13 4. If you get premium kiln dried lumber then you could span 10 5 with the same size of lumber and rafter spacing. An spf roof at the same spacing and lumber size will span 11.

An syp 2 6 rafter at 24 o c. Rafter plumb cut depth. So the space between rafters can be greater without reducing the maximum span. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center.

These numbers are for roofs supporting light loads of 20 pounds for square foot. After they re up you can snap a line to mark and trim the tails in a nice straight line to make up for any ridge warp or marking cutting and fixing errors. Gable roof a gable roof has two opposite sides with equal slopes and equal spans that meet in the center of the roof at the ridge.