​​Tracks are fabricated from three 3/16" structural steel angles, bolted together to form a guide channel.  Doors can be fabricated with optional 24 gauge galvanized steel hood and manual push-up or motor operated! However, chain hoist operation is standard.  Spring assembly is also fabricated in-house and mounted to steel torsion shaft with a cast spring plug.


​​With many of these materials in stock, Superior Door can - in most cases - repair your roll-up steel door and broken springs within a day!​​ 

S​uperior Door fabricates roll-up steel doors, rolling grilles and custom rolling doors! 

Our roll-up doors are made from flat or curved interlocking 20 gauge galvanized steel slats fastened with cast iron endlocks, and a bottom bar fabricated with a minimum of 1/8" thick steel angle and rubber astragal. 


​​​​Boston's commercial Door Service