Sat Feb 18, 2017
Notes: this is a 16" frame on the outside. In the USA, this can be cut from 4'x8' sheets, which means that 18 sets of these triple-nested frames can fit in a single sheet of this size. Use 1/8" steel in the USA, or 2 mm, or 3 mm in Europe.
When you get these made - you need 6 of these:
6 of these sets allows to make 3 full frames.
This is also shown in my document - see