Hello folks, a while back there was a thread where this was shared by one of the other members of the forum, I believe that it was Tommyjoking. If it was Tommy, thank you so much for sharing this, if it wasn't Tommy and it was someone else, I apologize for not correctly identifying you and thank you just the same. I compiled this in a diagram form and have started using it as a hand-out in the fabrication class that I teach.

To those of you that work a lot with layouts on the shop floor this can be invaluable in providing an accurate set of right triangle lines that can be used for stair stringer layouts, handrail layouts, and anything else that utilizes the need for an accurate 90 degree corner.

When I would put something like this to use I would use a chalk line and snap down an X on the floor and then measure from the point where the lines cross out an equal distance on 3 of the legs and then snap lines to connect these 3 points. Wa La, instant accurate right angle.

Best regards, Allan