... :30,40,60mm Cross bar pitch:50,100mm Steel Frame Lattice: Material:galvanized sheet,stainless steel sheet, Bearing bar pitch:30,40,60mm Cross ... pitch:50,100mm sheet thickness:3,4,5mmSteel frame lattice:Series 1(spacing 30mm steel plate)is the most common type, use in ... )UK:BS4592-1987 D)Australia:AS1657-1985 E)Japan:JJS Steel Frame Lattice