not my shop but still a structure,our bali hut has had a worn out alang alang grass roof for ages,Im on 2 weeks holiday so got quotes to re do it with asphalt shingles,Im saving 1200 aussie dollars stripping and disposing of the old #$%* myself,man!!2 days later!!what a dusty #$%*ty job not to mention the 5 million tiny black ants whose home I invaded at the very top and launched an attack on my balls my ears and eyes,up my sleeves,on the inside of my sunnies,anyway I got the trailer loaded up like a pakistani truck driver less the live chickens on top and a passenger on the draw bar ,was free to dump at the local council dump so all good,Ive never really looked close at all the compound angles required to build even a simple roof like this how all the timbers line up and have seen guys on this thread build their own sheds and workshops,its quite a skill!