Model 325

Description
Reviews (0)

Description

Model 325 – Perforated Rolling Door

Ventilated Security with Clear Sightlines

The ADT Model 325 Rolling Door delivers the perfect balance of visibility, airflow, and strength. Designed with 20-gauge perforated galvanized steel slats offering 40% open area, this door is ideal for facilities that require ventilation without sacrificing security. Each slat features precision-engineered perforations that allow for airflow and insect screening while maintaining structural integrity and visual access.

Whether securing underground garages, mechanical rooms, or loading docks, the Model 325 offers rugged performance with a clean, modern look and a wide range of customizable options.

Applications

Underground garages
Loading docks
Mechanical rooms

Operation Options

Manual lift
Chain hoist with gear reduction
Internal or external industrial motors
Hand crank with removable handle

Technical Specifications

Curtain:SP3 perforated galvanized steel, 20-gauge, hot-dipped per ASTM A653
Curtain Profile: Flat profile with 40% open area
Endlocks: Galvanized malleable cast iron for slat alignment and wear resistance
Bottom Bar: Double steel angle (min. ⅛”) with rubber astragal for weather-tight seal
Guides: Structural steel angles (min. 3″ wide, 3/16″ thick) with removable stops; optional windlock bars
Counterbalance: Helical torsion spring system, grease-packed, sealed ball bearings, external tension adjustment
End Brackets: Factory-painted steel plates (min. 3/16″ thick) housing shaft and bearings
Hood: 24-gauge galvanized steel with baked enamel coating and intermediate supports
Finish: Factory-applied rust-inhibiting enamel in gray or bronze
Locking: Slidebolts with padlock provisions (manual/chain models); self-locking gears (motorized)