If economy is as important as security, Steelcraft has the answer! We'll provide you with a steel rolling door or the aesthetic qualities of a rolling grille...and years of trouble free operation.
Security Doors and Grilles are fabricated of the same curtain materials as our Service Doors and Grilles. Hoods and tracks are compatible for mixed installations. They are particularly adaptable to smaller, light use openings, not in excess of 120 square feet. The economical flat spring assembly gives you trouble-free light duty use. It can even be motorized using an internal unit.

STANDARD SPECIFICATIONS
FOR SECURITY DOORS AND GRILLES
OPERATION: Push up maximum size 120 sq. ft., 140 sq. ft. for grilles.
CURTAINS: Are composed of interlocking slat designed #1 galvanized in # 22 U.S. gauge and fitted with steel endlocks to prevent curtain shifting between the guides.
GRILL PATTERN: (ASL and CSL), Patterns are composed of  horizontal rods of 5/16" diameter galvanized and 3/4" X 1/8" aluminum ( alloy 6063) vertical links. Horizontal rods are overlaid with 3/8" OD X .032  wall aluminum (alloy 6063) tubes. Spaces between rods do not exceed 2": spaces between links do not exceed 4-1/2" on ASL and  9" on CSL.
PERFORATED STEEL CURTAINS: Perforated curtains in lieu of grille curtains are available in slat designs #1 only. The perforations are available from 3/32" to 3/8" diameter when selecting the miniperf. The megaperf includes a 5-1/2" X 7/8" hole and can be spaced to control vision as desired.
BRACKETS: Standard brackets consist of 11 gauge thick corner cut on top and bottom. Bracket plates to be welded to a 1-1/2" X 1/8"  structural wall angle to form a self-supporting member.
GUIDES: Are composed of 11 gauge single piece steel channel welded to structural wall angle.
BOTTOM BAR: Is extruded aluminum interlocking inverted T or (2) 1-1/2" X 1/8" steel angles.
COUNTERBALANCE ASSEMBLY: Is blue steel spring wire mounted on a 2" pipe shaft and spring bearing retainers.
HOODS: Are composed of 24 gauge hot dip galvanized sheet metal formed to fit bracket plates.
LOCKING DEVICES: Includes pinlocks through the guides and curtain (slide bolts) or self locking on motor operation.
FINISHES: Hoods, guides, bracket plates and supporting angles are shop-painted. Colors: Gray, Brown, or Red Oxide Primer.