Cocopop17 Posted November 17, 2023 Share Posted November 17, 2023 Hi All, We have a 1970s bungalow with a traditional cut roof with ridge board. The rafters are supported mid-span via a structural stud wall in 8x2. This consists of a top and bottom plate with uprights under each rafter, all in 8x2. The stud walls are sat on steel beams. Now we had some ceiling joists that were removed following advice from the structural engineer so we could achieve a vaulted ceiling. To our surprise, the engineer later said these may have been stopping roof spread and he hadn’t realised they were tied in to the rafters. Following this, he stated he had advice from a second engineer that stated we shouldn’t need a form of tie as the structural stud wall is acting as a purlin and the roof span is theoretically split in half. So, our question is do we actually need to tie the rafters in? Pictures for reference. Thanks in advance! Link to comment Share on other sites More sharing options...
markc Posted November 17, 2023 Share Posted November 17, 2023 Your SE’s word is gospel as they are the ones taking the fall should anything go wrong, but for what it’s worth the stud wall will act as a purlin and take load but it could also act as a point of rotation if there isn’t one on the other side. In effect the roof could move to the right pulling up on the eaves closest to the stud wall. I think you should get something in writing before doing anything else. Link to comment Share on other sites More sharing options...
Cocopop17 Posted November 17, 2023 Author Share Posted November 17, 2023 Thanks for the reply Mark. There is the same setup on the opposite side. A steel beam with a Structural stud wall supporting the roof. The stud wall supports are Approx 1m from the ridge of the roof on each side. Does this mean the rotation is less likely to occur? I have requested it in writing. Link to comment Share on other sites More sharing options...
Mr Punter Posted November 17, 2023 Share Posted November 17, 2023 The same setup both sides is better but you will still need this in writing. Why is the beam spliced twice? That is a fair bit of work for a bit of vaulted ceiling. Looks nice though, especially with the Veluxes. Link to comment Share on other sites More sharing options...
Cocopop17 Posted November 17, 2023 Author Share Posted November 17, 2023 The length of the beam is 7.3m long so needed splicing to be able to get it into the building. We originally took a wall out that supported the rafters mid span so had to install the beam and structural wall anyway to support the rafters again. The half vaulted ceiling was an after thought. Link to comment Share on other sites More sharing options...
Cocopop17 Posted November 17, 2023 Author Share Posted November 17, 2023 Bump Link to comment Share on other sites More sharing options...
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