The skillion and shed style roofs are framed with a single slope 2 4 or 2 6 or thicker rafters spanning from the low wall to the high wall.
Roof joist spacing shed.
2 4 rafters can span up to 7.
There is no standard spacing it depends on what size of rafters you want to use and the span of your shed.
For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements.
In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts.
The smallest beams for patio covers are typically 4 by 6.
Skillion shed style roof framing.
Spacing your 2 4 shed rafters at 24 on center limits the width of your roof.
Studs spaced at 16 inches make for a sturdier shed but the 24 inch spacing is more cost efficient.
Stud spacing for a shed is important for two reasons.
Most roof framing is 24 on center and you can still build sheds up to 14 with 2 4 rafters at 24 on center.
If you plan to have eaves to protect the shed walls make sure you add the extra length when measuring the rafters.
A 4 by 10 can usually span up to 12 feet between posts.
In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.
A shed s sturdiness relates to stud spacing and stud spacing is a notable factor in total materials costs.
Although the standard spacing of roof trusses may be the same as that of rafters with 24 inch spacing being a common option the design of a truss may allow for the use of a lower grade of lumber than would be required for rafters with comparable spacing and span.
16 inch and 24 inch stud spacing.
The figures are based on quality materials.
If you get premium kiln dried lumber then you could span 10 5 with the same size of lumber and rafter spacing.
If the roof is not completely square you can decrease the space between joists but never increase the space.
In other words you would space a roof joist 15 inches apart from another roof joist but never 17 inches apart.
Two options that arise could be your wider 24 and your narrower 12 options for spacing.
For light load roofs 24 o c.
For heavy loads 2x4s can span up to 5.
A roof joist is always spaced no more than 16 inches apart from another roof joist.
For instance 2 grade 2x4s at 16 on center will span just over 9.
The tables below give maximum spans for rafters and beams.
2x8s are used frequently for these projects.
If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts.
In many circumstances 16 inches would be your standard spacing for shed floor joist but this is just a rough guideline.
Metal roofs and pole buildings.
