Product description Open steel grating means the steel grating with open ends. The two sides of the steel grating with no frame. The common size is 900mmx5800mm,900mmx6000mm. Open steel grating is one of the most commonly used steel grating, also called metal open bar grating. Welded steel grating is made of carbon steel or stainless steel. Welded steel grating has anti-slip surface, corrosion resistance, good drainage function, high strength and load capacity. So it is widely used as walkway, stair, fence, shelf, ceiling and floor in many places. Product Features * High strength and load capacity. * Anti-slip surface. * Corrosion resistance. * Good drainage function. * Easy to install and maintain. 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 etcUS 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;-Fencings for car-parks, buildings and roads; drainage trench covers and drainage pit covers for high strength .