Gable Roof Rafter Spacing

Total rafter length with overhang.

Gable roof rafter spacing.

These numbers are for roofs supporting light loads of 20 pounds for square foot. For standard shed roof rafter spacing see rafter span chart. 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. For instance 2 grade 2x4s at 16 on center will span just over 9.

Rafter plumb cut depth. Use the saltbox roof to calculate a two sided roof with different slopes spans and or overhangs for each side of the roof. 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. 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.

There is no standard spacing it depends on what size of rafters you want to use and the span of your shed. 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. 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. That means it can span a total length of over 26 for a gable roof.

Total rafter lumber length. 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. Framing a gable roof building a gable with barge end purlin struts and collar ties. 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.

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. Total roof width with rake overhangs. The same concept holds true for roof trusses. So the space between rafters can be greater without reducing the maximum span.

If you get premium kiln dried lumber then you could span 10 5 with the same size of lumber and rafter spacing. Can span up to 13 4. An syp 2 6 rafter at 24 o c.