... .US, UK or Australian std. 3.independent AutoCAD design 4.ASTM A36 steel 1.Steel Grating Standardizations:CountriesNational Standards for ... /8",1-1/4"x1/8",1-1/4"x3/16",1-1/2"x3/16",2"x3/16",2"x1/4".3.Bearing Bar ... Pitches:12.5mm,15mm,24mm,25mm,30mm,30.16mm(1-3/16"), ... Pitches: 38.1mm, 50mm, 75mm, and 100mm,101.6mm(4").5.Standard Grating Panels Sizes: 3'x12', 3'x20', 3 ...