[Al Skierkiewicz]

Hi there,
Aluminum extrusions can include but are not limited to tubing and bar stock. It most often refers to aluminum shapes that are available through several outlets, i.e. Home Depot, McMaster -Carr, and Small Parts or any local industrial suppliers. These shapes come in square and octaganal (sp.) tubing, structural extrusions, etc. The caveat here is that many shapes come in very thick cross sections that add unnecessaary weight because they are capable of supporting much heavier loads than the robot will encounter. Many teams use these strctural shapes for the base because they are easy to fabricate and assemble. If you have access to MIG welding at school you can also weld these shapes for whatever design you need. Check with your shop teachers, they proably know where to get the parts and how to weld the aluminum. Good Luck!
Al