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I joist shed roof.
2x8s are used frequently for these projects.
An syp rafter can span 11.
The crew framed this long span with wood i joists.
I joist construction details performance rated i joists in floor and roof framing form no.
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Boarding to be fastened on top of flat roof joists with a depth to width ratio greater than 4 the allowable clear spans have been calculated in accordance with bs 5268 2 2002 structural use of timber part 2.
As mentioned above a 2 4 spf shed roof rafter can span 11.
Hi i have a large brick built shed in the garden with an osb felt flat roof with exposed rafters below.
Two options that arise could be your wider 24 and your narrower 12 options for spacing.
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Conventional framing the first thing to understand is how a roof framed with wood i joists differs structurally from a traditional stick framed roof.
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Architect erik sokol s drawing shows the long shed roof at the left of the building as viewed from the street.
If you live in an area that requires a shed roof rafter to support a heavy load then an spf rafter can only span 7.
In many circumstances 16 inches would be your standard spacing for shed floor joist but this is just a rough guideline.
2 8 s come standard at 1 inch thick.
Both of these are for light roof loads.
The crew frames a long span shed roof using 16 inch deep wood i joists and steel hangers.
In a typical roof framed with dimension lumber the rafters rest on the exterior wall top plate at the lower end and bear against a ridge board at the top.
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How best to insulate a flat roof of a brick built shed.
Code of practice for permissible stress design materials and workmanship and bs 5268 7 2 1989 structural use of timber section 7 2.