The frame is made from welded steel and mattress springs, as follows. Materials:
- about 8 feet of 1" square stock of mild steel
- 18 springs reclaimed from an abandoned mattress
- about 10 feet of coiled wire spring from the same mattress
- oxy-acetylene torch
- MIG welder
- angle grinder
- soap stone or chalk
- grinding wheel
- welding table (not essential but it helped)
- metal chopsaw (angle grinder can be used instead)
The first thing I did was draw a diagram of what I was going to build. The frame of the saddle, I decided, would have one central bar, curved into a vaguely mustache shape, and a pair of struts on each side to support the width of the center part where someone would actually sit.
I drew a picture of half of the top-down view of the frame (including spring layout), and half of the side view (without springs). I drew some guide lines as well to help me keep track of what curves went where.