Product description Flat Steel grating, also known as bar grating or metal grating, is an open grid assembly of metal bars, in which the bearing bars, running in one direction, are spaced by rigid attachment to cross bars running perpendicular to them or by bent connecting bars extending between them, which is designed to hold heavy loads with minimal weight. It is widely used as floors, mezzanine, stair treads, fencing, trench covers and maintenance platforms in factories, workshops, motor rooms, trolley channels, heavy loading areas, boiler equipment and heavy equipment areas, etc. It is one of the most popular and versatile industrial steel gratings. It provides excellent bearing capacity and is widely used in almost all industrial applications. Product specification No. Item Description 1 Bearing Bar 25×3, 25×4, 25×4.5, 25×5, 30×3, 30×4, 30×4.5, 30×5, 32×5, 40×5, 50×5, 65×5, 75×6, 75×10,100x10mm etc;US standard: 1'x3/16', 1 1/4'x3/16', 1 1/2'x3/16',1'x1/4', 1 1/4'x1/4', 1 1/2'x1/4', 1'x1/8', 1 1/4'x1/8', 1 1/2'x1/8' etc. 2 Bearing Bar Pitch 12.5, 15, 20, 23.85, 25, 30, 30.16, 30.3, 32.5, 34.3, 35, 38.1, 40, 41.25, 60, 80mm etc US standard: 19-w-4, 15-w-4, 11-w-4, 19-w-2, 15-w-2 etc. 3 Twisted Cross Bar Pitch 38.1, 50, 60, 76, 80, 100, 101.6, 120mm, 2' & 4' etc 4 Material Grade ASTM A36, A1011, A569, Q235, S275JR, SS304, Mild steel & Low carbon steel, etc 5 Surface Treatment Black, self colour, hot dip galvanized, painted, spray coating 6 Grating Style Plain / Smooth surface 7 Standard China: YB/T 4001.1-2007, USA: ANSI/NAAMM(MBG531-88),UK: BS4592-1987, Australia: AS1657-1985, Japan:JIS 8 Application -Rotation ways, channels, and platforms for pump rooms and engine rooms in various ships;-Flooring in various bridges such as railway bridge sidewalks, over-bridges across the street;-Platforms for oil extraction sites, car washing sites and air towers;-Fencing for car-parks, buildings and roads; drainage trench covers and drainage pit covers for high strength .