... and unloading by fork-lift and crane. size bearing bars pitch can be set to 12.5,15,20 ... manufacture special pitch according to clients material carbon steel,aluminum,stainless steel anti-crossive property anti-acid and alkali corrsion ... …..40X6, 40X8, 40X10,….90X6….Pitch of Load bearding flat bars(mm)12.5,15, 20, 30, 30.6, 32 ... 34.8, 35.3, 40, 60, 80……Pitch of cross bars(mm)38.1, 50, 50.8, 70, 75, 80 ...