nod Posted August 12, 2022 Share Posted August 12, 2022 When I booked the crane I hoped it wouldn’t be raining I’d no idea it would be so hot I got in at 6am two hours before the crane and the heat Hope it’s not as hot tomorrow 1 Link to comment Share on other sites More sharing options...
Mr Punter Posted August 12, 2022 Share Posted August 12, 2022 Are all the trusses on now? The span looks quite big. I think you will have to wait for Monday for it to cool down. 1 Link to comment Share on other sites More sharing options...
nod Posted August 12, 2022 Author Share Posted August 12, 2022 All on and braced 14 8 meter attic trusses Probably could do to get it nogged out and the ladder on I’m going to get the house roof trusses ordered and loose rafters next week Link to comment Share on other sites More sharing options...
Nickfromwales Posted August 12, 2022 Share Posted August 12, 2022 5 hours ago, nod said: When I booked the crane I hoped it wouldn’t be raining I’d no idea it would be so hot I got in at 6am two hours before the crane and the heat Hope it’s not as hot tomorrow They're beats, must have been fun! Looking good 1 Link to comment Share on other sites More sharing options...
Radian Posted August 13, 2022 Share Posted August 13, 2022 16 hours ago, nod said: All on and braced 14 8 meter attic trusses So this is garage with Room In Roof. Does it connect to the house? We did our garage extension with RIR trusses. Span of 6.2m and a total run of 17m. Wasn't too impressed with the resulting floor feel though. Truss manufacturer did the engineering design but I can think of any way it could have been installed badly enough for it not to be predictably bouncy. One 4m section had a supporting wall 1.2m in from the outside reducing the effective span to 5m and this section felt much better. We ended up sistering the adjacent 6.2m chords with 25mm ply which was a pain but did solve the bounce. The gang that initially craned the trusses on and braced it all up said it'd be fine once nogged but this was BS. There's still a run that we haven't got around to nogging as it's just a store area but it feels no different. Link to comment Share on other sites More sharing options...
Chanmenie Posted August 13, 2022 Share Posted August 13, 2022 19 hours ago, nod said: All on and braced 14 8 meter attic trusses Probably could do to get it nogged out and the ladder on I’m going to get the house roof trusses ordered and loose rafters next week Do they span 14 Meters ? mine will span 8.7m, with 222mm joists I’m hoping there won’t be too much bounce. Link to comment Share on other sites More sharing options...
nod Posted August 13, 2022 Author Share Posted August 13, 2022 1 hour ago, Chanmenie said: Do they span 14 Meters ? mine will span 8.7m, with 222mm joists I’m hoping there won’t be too much bounce. No they span 8.5 meters At 600 centers Whilst the joists are 225 deep I will counter baton the underside before plaster boarding Link to comment Share on other sites More sharing options...
Chanmenie Posted August 13, 2022 Share Posted August 13, 2022 31 minutes ago, nod said: No they span 8.5 meters At 600 centers Whilst the joists are 225 deep I will counter baton the underside before plaster boarding Similar size to mine then, I was planning on counter batons as I’m doing the wall plates at 2.5m how wide with your upstairs rooms be ? Link to comment Share on other sites More sharing options...
Radian Posted August 13, 2022 Share Posted August 13, 2022 2 hours ago, Chanmenie said: Do they span 14 Meters ? mine will span 8.7m, with 222mm joists I’m hoping there won’t be too much bounce. My 225mm chords only span 6.2m on a 600mm pitch and gave unacceptable amounts of flex. Link to comment Share on other sites More sharing options...
Chanmenie Posted August 13, 2022 Share Posted August 13, 2022 19 minutes ago, Radian said: My 225mm chords only span 6.2m on a 600mm pitch and gave unacceptable amounts of flex. Are yours attic trusses ? The roof designers said with the 222 joists and 197 rafters at 600 centres I’d be at 60% of allowable deflection, plus there will be some internal walls down the middle, non load bearing but they will stop the flex, the bit that has no internal walls will be 400 centres Link to comment Share on other sites More sharing options...
Radian Posted August 13, 2022 Share Posted August 13, 2022 7 minutes ago, Chanmenie said: Are yours attic trusses ? Yes. Rafters are 25mm narrower than yours but that would be because of their total length which is probably less than yours (5627). This is supporting a slate roof. Doubt that the difference would make much difference to the flex of the bottom chord. Link to comment Share on other sites More sharing options...
nod Posted August 13, 2022 Author Share Posted August 13, 2022 5 hours ago, Chanmenie said: Similar size to mine then, I was planning on counter batons as I’m doing the wall plates at 2.5m how wide with your upstairs rooms be ? It’s only 3000 w 9000 long Make a nice office Link to comment Share on other sites More sharing options...
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