building a shed roof


Old 09-05-05, 06:56 AM
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building a shed roof

I'm making a garden office (20'x17'). The foundations are in and the walls are up; I'm now looking to start the roof. I want to put a sloping shed roof on, but now I realise I know *nothing* about roofs.

What stops a shed roof just sliding off?
What size timber etc should I use?
Is there a "how-to" or even a decent diagram out there?


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Old 09-06-05, 10:26 AM
shinstr's Avatar
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Location: Berkley Michigan
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Is one exterior wall higher than its opposing wall? If not....may be more trouble than its worth now for a shed roof. Unless you have trusses made.

Size of lumber will depend on the "span". You should always try to "span" the shorter side (17') Dont quote me, but I think your close to maxing out 2x12 lumber capacity, and it could be beyond the reach of a 2x12 depending on your region (Live load/Dead load calc's).

Again, may be simpler to go with a gable ...span is cut in half. Now your only dealing with 8.5' or 10'

Good Luck!

Last edited by shinstr; 09-06-05 at 10:39 AM.
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