Hi,
Im currently building a small(ish) garden building with pitched roof and am looking for advice or reassurance on how to tie rafters at the top.
The roof has been designed what I understand to be built "traditionally" with single ridge steel and rafters.
The beam has a bearer board bolted on top, and the rafters are bird nosed both to the bearer board and the wall plate.
My understanding with the engineer is that spread is not an issue given the size of the ridge beam (it was specified that the celing would be vaulted without collar/rafter ties so the beam is quite large)
My concern/question is how do I prevent the rafters movig latterally (pic attached), or is it just reliant on the loading of the rafters with the tiles etc.
Would it be acceptable to use wind/hurricane ties between both the ridge bearer and the rafters, and again at the bottom between wall plate and rafters. Should the two rafters at the top be mechanically fixed to each other.
I'm not a great fan of cross nailing as that resulted in the split of one rafter and having to redo. After that they were piloted and a single nail put through just to hold in place while I get an answer to this question on belt and braces fixing.
Any advice greatly received.
Im currently building a small(ish) garden building with pitched roof and am looking for advice or reassurance on how to tie rafters at the top.
The roof has been designed what I understand to be built "traditionally" with single ridge steel and rafters.
The beam has a bearer board bolted on top, and the rafters are bird nosed both to the bearer board and the wall plate.
My understanding with the engineer is that spread is not an issue given the size of the ridge beam (it was specified that the celing would be vaulted without collar/rafter ties so the beam is quite large)
My concern/question is how do I prevent the rafters movig latterally (pic attached), or is it just reliant on the loading of the rafters with the tiles etc.
Would it be acceptable to use wind/hurricane ties between both the ridge bearer and the rafters, and again at the bottom between wall plate and rafters. Should the two rafters at the top be mechanically fixed to each other.
I'm not a great fan of cross nailing as that resulted in the split of one rafter and having to redo. After that they were piloted and a single nail put through just to hold in place while I get an answer to this question on belt and braces fixing.
Any advice greatly received.