![]() In fact, collar ties do not really even supplement floor joists in resisting outward thrust on the walls. A collar tie is not designed to replace floor joists, which have the function of resisting outward load on the walls caused by vertical roof loads due to dead load and snow. The purpose of a collar tie is to assist in transferring load from one side of the roof to the other (with respect to the ridge board) when uplift occurs, which typically occurs during high wind situations. I'll post a diagram as well.Ī "collar tie" is typically a relatively small element, say 1圆, attached in the upper third of the attic. But, I'm always a little nervious about cutting things. I'm thinking these are maybe remnants of the original construction process that were holding things together while the roof was being framed. Most I have seen are on steeper roofs and towards the top of the roof not the bottom. I know what collar ties do, but these don't seem to be for that function. I don't think they are accomplishing anything structural (since they are sagging so bad they don't apply any compression or tension). I'm remodeling and would like to remove these ties since they are sagging and make it difficult to run conduit and other stuff in the attic. ![]() (Actually the ties are two long ~20 foot 1 x 4's that are nailed together to extend about 40 feet. In fact the collar ties are so long that they sag and lay on the ceiling rafters. However these ties are really low on the roof and connect to the roof rafters just above the exterior walls. ![]() There are what I can best describe as "collar ties" which run every other rafter. Don't have the grade of roof but it isn't overly steep (easily walked on without siding off). Simple Roof construction, with a single ridge beam and roof rafters that extend from the ridge beam to the exterior load bearing walls.
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