In article , Pecanfan wrote:
Basically, I'll install a temporary joist from the back wall to the
concrete floor and fasten the existing joists to this using twisted
restraint strap. This should provide enough support to stop the
ceiling from collapsing while I remove Joist B. I'll then just
bolt new joists to the existing joists and remove the temporary
joist once everything is secure.
Can anyone think of any problems with this or does anyone have any
better ideas?

All of the joists in question are 65 x 175mm and the span from left
to right is 2370mm.

That all sounds quite sensible, although it would save time if your
neighbour downstairs would allow some temporary propping while you
removed trimmer joist B. Where you bolt the old and new joists
together I would want to see large square washers under the bolt heads
and nuts with double sided toothed washers in the join. The bolt
size/spacing does need to be checked for adequacy.

I tried downloading SuperBeam but it makes no sense. :-)

Will you forgive me not adding this to the quotes on our website g

--
Tony Bryer SDA UK 'Software to build on' http://www.sda.co.uk
Free SEDBUK boiler database browser http://www.sda.co.uk/qsedbuk.htm