![]() ![]() ![]() I first saw this on the fine home building site. Description: Featuring Trus Joist® TJI® Joists for Floor and Roof Applications Document ID : tj-4000 File Type: pdf File Size: 5.1 MB File Date: October 2023 Document Types: Design & Specification Categories. There are some green builders in VT who say you don't need a vapour barrier because the cellulose stops almost all infiltration and can absorb a lot of water and let it back out to the interior. In areas with mild climates, patio roofs are generally designed for loads of 30 psf (pounds per square foot). ![]() If I wanted the beam and plank look and didn't have to worry about code I think I would explore site built Larson trusses and blown in cellulose. An essential part of planning a patio roof or gazebo project is determining the number, size, and spacing of rafters, beams, and posts, according to the loads they will carry. I always thought that the roof was one of the drawbacks with straw bale. I also built roofs on top with 2x12 rafters and fiberglass to do the same thing.īack when I was reading about super insulation there were folks using TGI's in Alaska with post and beam roofs and walls I think. That's why SIP's are such a good marriage with beams. It wasn't that hard to do but I never felt that good about it. 4" foam 2x4 strapping with another layer of 1 1/2" foam cut to fit between the strapping. I have done the foam bit to winterize porches that were beam and 2圆 T&G. Set the run, overhang, birdsmouth depth, height above plate, rise from wall, rafter depth. Design any rafter with any roof pitch or roof angle. Is the black poly a vapor barrier? why Black? Free Professional Rafter Calculator, View interactive plan with 3D Rafter plan. ![]()
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