Gable Roof Rafter Spacing

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.

Gable roof rafter spacing.

Can span up to 13 4. 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. These numbers are for roofs supporting light loads of 20 pounds for square foot. There is no standard spacing it depends on what size of rafters you want to use and the span of your shed.

Total rafter length with overhang. Framing a gable roof building a gable with barge end purlin struts and collar ties. That means it can span a total length of over 26 for a gable roof. For instance 2 grade 2x4s at 16 on center will span just over 9.

For standard shed roof rafter spacing see rafter span chart. Rafter plumb cut depth. 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. 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.

Total roof width with rake overhangs. An spf roof at the same spacing and lumber size will span 11. 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. If you get premium kiln dried lumber then you could span 10 5 with the same size of lumber and rafter spacing.

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. The same concept holds true for roof trusses. So the space between rafters can be greater without reducing the maximum span. Common spacing for trusses on this type of building is often between 2 and 4 feet but trusses built with advanced designs may allow spacing as great as 8 or 12 feet.

Total rafter lumber length. Use the saltbox roof to calculate a two sided roof with different slopes spans and or overhangs for each side of the roof. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center.