Thanks for that Mark: looking at it , it's quite different, but quite the same-ish, to the way I would (sui generis) work out a triangle/frame or whatever myself. I would be calculating clean(ie easily identifiable right- angled triangles) triangles from the centre-lines themselves, establishing angles/parallel lines from them, then offsetting to the edge (or from 90 deg triangle), edge + angle offset if req. I call the intersections the "nodes" : they are there on your drawing, but the calcs aren't.
Does that mean your students calculate the angles from the drawing, or from the dimensions?
As I'm unfamiliar now with our "Imperial" measurements for calculation these days, because I only use metric for that,(but I was raised on the other scheme)the dims on the drawing, look, to me, much more complicated than they shd be!
Maybe it's Friday and we are all letting our hair (sic) down!
Re: some details of my work (ref to sites quoting my work): I tried to pm you but it didn't work obviously. I'm too lazy to find out how to scan stuff into the web (too much woodworking to learn!) so I'll have another go. Best regards L.
PS I am not "the" lignator: you are all lignators!! And I don't pretend to be an expert in anything!
