Covers corrugated sheet steel beams for highway guardrails and their end or buffer sections, back up plates, bolts, nuts and washers. Classifies the product by thickness into 2 classes: class 1 (3.2 mm) and class 2 (2.5 mm) and into 2 types according to weight of zinc coating, i.e. Type 1 (550 g/m2) and Type 2 (1100 g/m2). specifies shapes, dimensions and tolerances, materials and manufacture. Prescribes requirements for general characteristics . Includes marking, sampling, inspection, testing.