Hi everyone,
Does anyone have a good source for details regarding the design of deep eave overhangs that are not supported with posts, brackets or cantilevered structure?
Some pertinent details, this is an 8/12 pitch SIP and metal roof with a heavy snow load with up to a 4′-6″ overhang that would be framed off the SIP roof and 2×6 walls @ 16″ O.C. The overhang would also have a covered, level, vented soffit.
Any thoughts or details would be appreciated. Resorting to brackets would be the last resort.
Replies
Can you post a drawing of what you are trying to do?
Thanks.
With 8/12 pitch a 4 foot overhang will put the soffit 2'8" down the wall from the rafters. This triangle will provide substantial bracing for the overhang.
You are going to need some structure between the walls, bottom of the SIP roof panels, and that vented soffit.
Best plan is to run the numbers on the forces your snow load will exert, and design that structure to handle it and transfer the loads to the wall (and down to the foundation)
If you are not up for the task, best find an engineer to look at the details and sign off on a solid solution.
Another way to go would be to have the SIP panel supplier do the engineering and give you panels designed for the intended overhang and environment (snow load).