It's just as well that I did not attempt to install the stud frame today.
I needed to cut the excess metal off from the overhead beams.
(If I left it in place I would need to rebate the top plate extensively and it is already a very complicated assembly)
I anticipated that this would take about half an hour and then I could get back home, or perform some other chores out on site.
However, when I attempted to wield the 9 inch angle grinder atop a ladder I realised that this was very unsafe without a scaffold to work from.
I needed to dismantle a scaffold from down below, drag it up on top, and set it up again.
I did most of the work using a 5 inch angle grinder but there was still one step where the 9 inch was essential.
After removing the excess I realised that the assembly would lose some of its integrity unless I repeated some of the welds at the very end (it is two PFC 150s welded back to back).
I spent about an hour grinding out valleys and then welding them.
After that I needed to clean up the welded surfaces and apply primer.
By now I had hauled many different tools up on to the roof and I needed to use a wheelbarrow to take everything down again.
I had a half hour break and was just about to start loading timber on to the back of the utility when Jim and Sandy dropped in for a visit.
By the time I had loaded 12 good candidates it was 5.00 pm.
I had dinner and a shower and headed home.
I anticipate installing the stud frame on Easter Good Friday.