Shed Roof Rafter Spacing

So the space between rafters can be greater without reducing the maximum span.

Shed roof rafter spacing.

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 standard shed roof rafter spacing see rafter span chart. 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. Typical rafter spacing codes will specify a minimum spacing of 16 inches 19 2 inches or 24 inches.

For light load roofs 24 o c. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. This is most likely the standard size that you will find on pre made roof trusses. 2 4 rafters can span up to 7.

Rafter spacing depends on the roofing panel size. As most building these days are using those pre made trusses on the roof 24 inches become the main size for any roofing construction when it comes to its truss installation. There is no standard spacing it depends on what size of rafters you want to use and the span of your shed. 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 instance 2 grade 2x4s at 16 on center will span just over 9. This allows the panels to be securely attached to the rafters for maximum stability. Spacing your 2 4 shed rafters at 24 on center limits the width of your roof. If your local building authority has a rafter spacing code you may not space rafters wider than required by code.

For heavy loads 2x4s can span up to 5. Rafter spacing rafters must be strong enough to hold the roof sheathing and the shingles. Most roof framing is 24 on center and you can still build sheds up to 14 with 2 4 rafters at 24 on center. 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. Typical standard the typical standard for the spacing on the roof trusses is 24 inches. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center. If you get premium kiln dried lumber then you could span 10 5 with the same size of lumber and rafter spacing.

Our roof rafter calculator tools are handy for calculating the number of rafters needed rafter length calculator lineal feet of rafter board feed in ridge and sub facia and the total board feet in the roof.