Roof rafters roof rafters ties3/16/2024 "Īnd when the stresses in the roof members are computed the loads are resolved into vectors.Ī 10 PSF load on a 45 degree roof is 7.07 pounds straight down and 7.07 pounds parallel to the rafter length.Ī 10 PSF load on a flat roof is ten pounds straight down only. "The span tables in building codes and "accepted engineering practice" assume that snow loads are applied to a sloped roof in the same manner they are applied to a flat roof. At least here in Ohio, I didn't need a permit to have my roof reshingled in 1995. The structure has lasted this long, foundation was the original problem, nothing with the roof-use some common sense people-you are reducing the load, so any stresses on the roof will be less than current ones-as long as all the old wood is intact and not decaying, don't mess with it. ![]() You might put some ice shield membrane on the lower sections near the edge to prevent ice dams, but that's the only thing I'd change. What I would do, when replacing, is tell them to keep the random width boards as they are better than plywood, and nail new shingles (real or asphalt) over them. ![]() You are removing all the loads of shingles to put on new.I'd say you don't need an engineer at all-you are reducing the weight of the roof, and all other conditions are the same. ![]() Let's see, the house is nearly 200 years old, hasn't moved to a harsher climate, and the ridge is straight-kneewalls help support the rafters about half-way to the ridge.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |