DELTA provides structural components including cee's, zee's, angles, channels, eave struts, and more. They are used on roof and walls to span the distance between the primary rigid frames in order to support the metal roof and wall panels. The girts and purlins are often coated with a rust-inhibiting primer (red oxide) or are unpainted galvanized steel members. Secondary framing members can be punched with holes and slots in standard or custom patterns to accept connection bolts or bracing.