Thank you noseall - for the advice and the quick reply!
Joists are 50x200 at 600 centres although may drop to 500. Would you recommend another 50x200 as the timber plate?
Best wishes
Allan
I am presently replacing an old concrete roof on a lean to style extension. I was hoping to use masonry joist hangers into the existing external wall to support the new joists or would a timber wall plate with hangers be better? Should I use firings or simply have the hanger/plate raised...