Doing my loft extension; total house width span is around 6400. I have a steel beam in the middle and joists (3m and 3.6m joists) will meet in the middle resting on the beam for support. Is it ok to simply m10 coach bolt the joists on the beam together where they overlap slightly? As opposed to a joist running the length of the beam with joist hangers on it? The beam offers the structural support.
Secondly, a possible alternative that has arisen is to feed ends of joists into the beam web. However there’s nothing to fix them there apart from the web itself (they will be full of noggins etc so won’t move about). A timber bolted to the web isn’t possible now as beam is in place and there aren’t any bolt holes in it and I already broke 3 bits trying to drill into it!! Just wondering if there was an alternative or if bc would accept that? Initially the plan didn’t allow for that but we’ve found that in situ it may be possible so just thinking about it. Thanks!
Secondly, a possible alternative that has arisen is to feed ends of joists into the beam web. However there’s nothing to fix them there apart from the web itself (they will be full of noggins etc so won’t move about). A timber bolted to the web isn’t possible now as beam is in place and there aren’t any bolt holes in it and I already broke 3 bits trying to drill into it!! Just wondering if there was an alternative or if bc would accept that? Initially the plan didn’t allow for that but we’ve found that in situ it may be possible so just thinking about it. Thanks!