Internal RSJ building work

Question

I 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.

Phillip · Accepted Answer

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

Liam · Answer

Should be bolted not screwed. Carpenters I use would always double bolt each timber

Shemaine · Answer

Best thing to do is to ensure it complies with building regs

Jon · Answer

1.5 same size timber treated using 16mm nuts and bolts using zig zag method with dog washers in between

Gary · Answer

The idea is correct and would be strong enough if bolted together instead of screwed

Ansir · Answer

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.

Internal RSJ building work

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