... )durable in use 4.Application:steel grating is mainly used for industrial platform, ladders, helps column, channel pedal, railway, ... highway, railway guardrail etc.Steel Grating Standardizations: CountriesNational Standards for GratingMaterialsGalvanizing Standards ChinaYB/T 4001.1-2007GB 700-88GB/T13912 ... ),UK: BS4592-1987, Australia: AS1657-1992, Japan:JIS Press Locked Steel Grating for channel pedal