... 2,FB405/30/100, 3,Surface:Untreatment,Galvanized,Painted...... 1.Steel Grating 1).Bearing bar pitches may be 12.5 to 15 ... dipped Galvanized, Painted, Untreated.2. Guide to selection of steel grid plated Light & Medium Duty Maximum recommended spans(mm)LOAD BAR SIZE ... NO PUBLIC USE UDL=2.5KPaPEDESTRIAN TRAFFIC PUBLIC, RESIDENTIAL AND LIGHT USE UDL=3KPaPEDESTRIAN TRAFFIC PUBLIC, OMMERCIAL AND CROWD USE ...