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Ask your QuestionI am having an internal wall taken down and RSJ put in but i would like the RSJ to be flush to the ceiling. The builder has said he needs to cut the joist back and then will re-join with 300mm joist screwed to the orgional ones and then hand these on the RSJ, is this strong enough ? or should bolts and longer pieces of timber used.. if bolts how many per joist should be used.
Asked by David on 28th Aug 2019"Should be bolted not screwed. Carpenters I use would always double bolt each timber"
Answered on 18th Apr 2020 - Member since Mar 2020 - report"Best thing to do is to ensure it complies with building regs"
Answered on 3rd Sep 2019 - Member since Aug 2019 - report"Yes it strong if it’s over 1.2 and must use timer connectors or bolts An alternative way is to cut joist we’re tsk is to be placed double up a timber bolt through tsk then use jiffy hangers on cut joists to timber in rsj yielding. Ontroll prefer this method"
Answered on 4th Sep 2019 - Member since Aug 2019 - report"1.5 same size timber treated using 16mm nuts and bolts using zig zag method with dog washers in between"
Answered on 16th Sep 2019 - Member since Aug 2019 - report"The idea is correct and would be strong enough if bolted together instead of screwed"
Answered on 8th Jun 2020 - Member since Jan 2020 - report"Hi
You need Same size timber treated using 16mm nuts and bolts using zig zag method with square or dog washers in between"
It’s bit extra work but possible anyway."