Home Crossarms Hollow Steel Crossarm, 4″ x 4″ x 90″L Hollow Steel Crossarm, 4″ x 4″ x 90″L Frontier Part Number: 401HSC76 NOTES: HOT DIPPED GALVANIZED PER ASTM A153 HOLLOW SECTION & CHANNEL BEAM MADE OF STRUCTURAL STEEL CONFORMING TO CSA G164 DOWNLOAD PDF DRAWING