Gable Roof Rafter Spacing

Rafter plumb cut depth.

Gable roof 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. That means it can span a total length of over 26 for a gable roof. An spf roof at the same spacing and lumber size will span 11. The picture above shows the plan view of a gable roof ladder trusses are made up using four noggins bridging at each corner to support a rafter outside the building.

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. 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. So the space between rafters can be greater without reducing the maximum span. Framing a gable roof building a gable with barge end purlin struts and collar ties.

These numbers are for roofs supporting light loads of 20 pounds for square foot. For standard shed roof rafter spacing see rafter span chart. An syp 2 6 rafter at 24 o c. There is no standard spacing it depends on what size of rafters you want to use and the span of your shed.

Total roof width with rake overhangs. 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. For instance 2 grade 2x4s at 16 on center will span just over 9. Can span up to 13 4.

Total rafter length with overhang. Use the saltbox roof to calculate a two sided roof with different slopes spans and or overhangs for each side of the roof. 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. The same concept holds true for roof trusses.

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. If you get premium kiln dried lumber then you could span 10 5 with the same size of lumber and rafter spacing. 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.