Profile: Robertson Grating Products, Inc. is a grating supplier and fabricator. We provide bar grating, plank grating, fiberglass grating, handrail fittings, perforated metals, woven wire and expanded metal. Bar gratings are used for trenches, stair treads, walkways and mezzanine levels. Our welded steel bar grating is used in most general industrial plants as well as commercial buildings, it has wide applications as walkways, platforms, safety barriers, drainage covers and ventilation grates. It is also ideal for use as mezzanine decking since it supports the same loads as comparable solid flooring. Woven wire includes double crimp, double intermediate crimp, lock crimp, inter crimp & flat top crimp. Weave styles are plain weave, plain dutch weave, twilled weave and twilled dutch weave.