Design and Plans
Manufacturing Spreadsheet

Crossbrace Assembly Worksheet
Part/Assembly Name Quantity per Chair Material
Sequence #
 Manufacturing Sequence Equipment Used
H-Tube Top 2 Steel Tubing 1 Cut tube to length Tubing Cutter
H-Tube Bottom 2 Steel Tubing 1 Cut tube to length Tubing Cutter
H-Tube Center 2 Steel Tubing 1 Cut tube to length Tubing Cutter
2 Miter ends Mill
H-Tube Center Inserts 2 Steel 1 Cut stock Band Saw
2 Machine outer diameter of stock Lathe
H-Tube End Inserts 4 Steel 1 Cut stock Bandsaw
2 Machine ouside diameter, drill and tap Lathe
End Caps 4 Delrin or Nylon 1 Cut stock Band Saw
2 Machine to size Lathe
Crossbrace Bushings 4 Bronze 1 Cut stock Band Saw
2 Machine inside and outside of bushing Lathe
Crossbrace Assembly 1 Press center inserts into H-Tube Center
2 Locate H-Tube Top, H-Tube Bottom and H-Tube Center in jig
3 Weld or braze all joints
4 Press H-Tube End Inserts into H-Tube Bottom
5 Install End Caps
Chair Assembly Main Frame Caster Assembly Crossbrace Assembly Footrest Assembly