Shed Roof Joist Spacing

Roof rafter span use this table to determine the maximum lengths of roof rafters based on species and grade of lumber spacing dimensions load and slope.

Shed roof joist spacing.

Live load psf dead load psf span calculator for wood joists and rafters available for the iphone. Spacing joists in your shed 16 inches on center will give you a firmer feel with less bounce and increase the load capacity of the floor. Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size. In other words the maximum distance it can cover without support from posts.

Studs spaced at 16 inches make for a sturdier shed but the 24 inch spacing is more cost efficient. Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch. The determining factor of post spacing is the allowable span of your beams. Span calculator for wood joists and rafters also available for the.

Plywood or osb is the most common materials used for the roof sheathing. Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run. A shed s sturdiness relates to stud spacing and stud spacing is a notable factor in total materials costs. Factors that impact your shed roof design.

Rafter and roof joist spacing is only one part of a complex roof design that works together to form a structure that meets building codes and can hold up the weight of the roof and roof load. There is no standard spacing it depends on what size of rafters you want to use and the span of your shed. It must meet the local codes for thickness at least 3 8 which is also based on the rafter or truss spacing. If you had a 12 12 shed with a gable roof that would mean 26 rafters which is a lot.

There are two stud spacing options for a shed. While you may be ok with the joist span at 24 inches the floor will be maxed out to the limits. Builders aren t bound by standard rafter spacing measurements. Spacing in exterior exposure.

However if the spacing is too wide the patio cover s beams will bow under the weight of the joists and roof covering materials. For instance 2 grade 2x4s at 16 on center will span just over 9. Allowable spans vary according to wood species and the loads. Spacing your 2 4 shed rafters at 24 on center limits the width of your roof.

Stud spacing for a shed is important for two reasons. Moving to 16 on center you could span your spf 2x4s up to 6 for heavy loads and 9 for light loads which would still work with a 12 12 gable shed.