Auxiliary Arms Provide High Clearance Advantages


(U.S. Patent No. 4,609,027)

Get the Highest Clearance of Any Bi-Fold Hangar Door on the Market

Our patented, high-clearance door support arms are located on each side of the Hi-Fold door. The auxiliary arms enable the door to open completely while requiring less overhead space. As the door rises, smooth-rolling steel wheels on the arms contact the optional reinforcement rails on both jamb posts to provide strong, dependable support. Our auxiliary arms are made of heavy-gauge square-steel tubing with self-concealing chain followers.

A double-strength center hinge, welded-steel wind trusses, and strong, vertical joints combine with the auxiliary arms to hold the door in the horizontal, fully open position, with minimal deflection.


Auxiliary arms provide high clearance advantages