3/24/2024 0 Comments Roof rafter tie![]() ![]() The rafter ties can generate tremendous force on the rafter to which it is connected. The number of ties required per rafter will vary by situation. See a structural engineer if you have a real problem that needs to be solved.įor those who are not familiar with rafter ties, I have included Figure 1 as an illustration of what they are and how they are connected to the rafters. Instead, I am reviewing the basic mathematics and physics used in doing this sort of work. Note that this post does not presume to train anyone on how to do structural engineering. I also noticed that the same equation is also built into an online calculator. I became curious where the equation used in this article came from and I decided to derive it myself. ![]() I had forgotten about this old farm building until I saw an article in the Journal of Light Construction (JLC) on the problems associated with using rafter ties on a roof. ![]() This also was a sign of tremendous tension. I noticed that steel cables has been hidden behind the rafter ties to try to reinforce them, but the screws attaching the cables to the rafters were also pulling out. The rafter ties were clearly pulling away from their rafters because of the tension forces they were experiencing when under snow load. I noticed that the rafter ties had pulled away from the rafters they were nailed to. As a boy, I remember seeing a dilapidated farm building that had a set of rafter ties in its attic. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |