BOM Template
Protocol
Search the web for suppliers serving the area.of interest. For the seminal workshop, this is the Maysville, MO area in the USA, zip code 64469.
Suppliers can include local Hardware stores, such as menards, home depot, and Lowes as the main ones in the area. Mokan is the most favorable local industrial supply of bolts. Metal by the Foot is a local contractor supploer of all steel sections, up to 3" diameter rod or larger. There will be other industrial suppliers, McMaster Carr being the most favorable, followed by Grainger and Misumi that specializes in cut to length aluminum extrusions. Locally there is the Sweiger Shop as a heavy metal fabricator. Then there are various global online stores. Amazon and ebay are common sources. And ultimately, there is Alibaba and China, where
Template
Notes: To calculate weight of steel plate, use Metals Weight Calculator, Steel Plate Weight Calculator (includes holes), or fpr bolts, use Bolt Weight Calculator.