I have some ideas on what to have around the shop in stock for things I want to mod.You know angle iron,square tube,18 gauge etc.I learned when I had the last shop it was far better to stock small amounts of raw materials and I have a recycle steel place here in Roch that sells new material cut-offs and overstocks at a pretty good discounts.

So I am looking of suggestions of what to have on hand of the more commonly used materials.