"sm_jamieson" wrote in message
oups.com...
Is it OK for the regs to build roof purlins into the inner aircrete
skin of a cavity wall ? (cold bridging etc)
Can they rest on the aircrete blocks without any padstone ? I have to
support purlins near the top of such a wall, and hangers usually need
a weight of masonry above. I cannot think of any other way of getting
a good support with the lightweight blocks. If it was rafters, a wall
plate would be used, but the wall is sloping, so this would not be
suitable.
Also, can the aircrete blocks be cut height-wise to support the
purlins at the correct height ?
Thanks,
Simon.

Can you have a purlin at the bottom of a rafter? Or is this like a sleeper
wall which comes part way up the rafter? Either way, it sounds more like a
wall-plate to me.