| > > Okay, so I missed this class in Geometry... the gambrel, barn, dutch, or | > > mansard-type roof (or whatever it is called) | >
| > > Next month I plan to build a 20 x 20 shed for my trailers with a 6' rise to | > > the ridge (from the plane of the top plates). I want the upper and lower | > > sections to be the same. | >
| > > I googled around and could not find the angles. Help will be appreciated. | >
| > > woodstuff | >
| > Constrained by the parameters you gave, and assuming the flattest | > portion of the roof needs at least 3 on 12 pitch for adequate runoff: | > The bottom section would have a pitch of 13 1/4" rise per foot of run | > (48 degrees from horizontal) and the top section would have 3" of rise | > per foot of run (14 degrees from horizontal. Each rafter would be | > slightly over 6 feet in length (exclusive of tail). | >
| > However, these dimensions will yeild a very squatty gambrel roof. If | > you can raise the center to 8 feet or so, the proportions would be | > more traditional and make the loft more useable too. In that case, | > I'd make the bottom section 60 degrees from horizontal and the top | > section 14 degrees from horizontal. Rafter lengths would go to 6.5 | > and 7.5 feet respectively (exlusive of tail). | >
| > DonkeyHody | > "In theory, theory and practice are the same, but in practice, they | > are not." | | I should have said the rafter lengths would go to 6.5 feet on the top | section and 7.5 feet on the bottom section. | | DonkeyHody
thanks for the work! I may well go this way and lower the sidewalls to 7'.. I am buying an enclosed trailer for my work that is 7'11" high and 8'6" wide (outside of the wheels). The other trailer is just as wide at the wheels, buy is a low utility trailer. Maybe it wouldn't be so bad to just build a mezzanine on top for some type of storage, rather than wasting the space. Just now I can't think of anything to put up that high....
with appreciation,
woodstuff