Guard Rail Beam

Abstract: Provided is a guard rail beam characterized by being constituted from a plated steel material comprising a steel material and a plating layer that is formed on both surfaces of the steel material and that comprises Zn-based plating, at least one edge surface of the steel material being covered by the plating layer, and the relationships 0.60 × tc = te < tc, We = Wc, and Wt = Wc being satisfied (where tc is the average plate thickness (mm) of the steel material at positions at least 10 mm inward from the edge surface covered by the plating layer, te is the average plate thickness (mm) of the steel material at positions 1-10 mm from the edge surface covered by the plating layer, We is the average thickness (µm) of the plating layer per surface at positions 1-10 mm from the edge surface covered by the plating layer, Wc is the average thickness (µm) of the plating layer per surface at positions at least 10 mm inward from the edge surface covered by the plating layer, and Wt is the average thickness (µm) of the plating layer on the edge surface covered by the plating layer).

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