Industrial sectional door specs of doorplate：width：2440mm-12000mm，height：2130mm-7300mm，thickness：40mm-45mm size of doorplate：
size of doorplate 4m2-80m2 material doorplate：
doorplate is made of double-layer hot-dipped galvanized mosaic-stamped steel plate ,the core material is polyurethane track specs：
two type of inches (51mm)and 3 inches (76mm)are all using 1.5-3mm hot-dipped galvanized steel plates ,including standard lift ,low lift ,high lift ,vertical lift and roof pitch lift track way of control：
industry opener balance system：
out-built twist spring balance system inflammation-retarding testing grade：
European standard NF-P92-503 or Germany standard M2DIN 4120B1
