here are some quick "rough" plans for a scultur i have all the dimensions for the angle iron and plywood as well.
28.75 x 16.625 x 3/4" plywood
63.75 x 16.625 x 3/4" plywood
1.25 x 3/16" angle4 x 41"
4 x 19.25"
4 x 17.125"
4 x 16.75"
4 x 17"
2 x 29.125"
2 x 64.125"