Strange the stuff that triggers memories;
back in the late 60's when all I was interested in was women and motorcycles (not necessarily in that order), My dad came back from the pub one night and tried to explain to me how to calculate the angles of that kind of end of building rafter joint (dad loved to talk when he was oiled).
I couldnt make head nor tail of it then, and as you are all aware, I still struggle with basic maths to this day.
He was an architectural ironworker, used to make those kind of rooves on big buiildings. I think I failed him that night :roll: :roll: