: A good source for weldable hot-rolled steel rebar, like Hillman SteelWorks

Suppliers like Nucor Rebar Fabrication or local "steel yards" often provide rebar by the ton or in 20-foot lengths.

: Widely available with a variety of precut lengths, such as 1/2 in. x 10 ft. #4 Rebar and specialty options like fiberglass PINKBAR+ .