This is basically an adult industrial erector set. Use this to build racks, tables, etc..
We have Edsal Slotted Angle Kits. Various sizes. Originally this was (2) EDSAL SA-GPK Slotted Angle kit and (12) packs of the Edsel SA-21205 Slotted Angle Kits. This was used to make a material storage rack that I have since taken apart. There is a full box of (5) 12ft pieces (unused), about (15) pieces cut to about 96", and all remaining pieces are between 38"-48", as well as the angle plate kits/bolts etc.
Pickup today only in Mineola (Saturday)