Extra-strong double-angle 'bottom bar with astragal is formed of two 1/8" thick steel angles and a half-slat. It reinforces lower edge of curtain against wind pressure, and permits varied lock, astragal and safety edge options. Hangs freely on curtain to reduce friction. Preassembled to curtain for ease of installation.     Roll-formed steel guides are fabricated from precisely formed angles and channels with integral windlock bars. They guide curtain travel, and can withstand wind loads to 20 PSF. Top of guides are flared to assure smooth transition of the curtain into the guides.

3. Guide stop installs easily, without fasteners protruding into the guide openings to interfere with door operation.
      
4. Heavy, formed 3/16" minimum steel brackets support and enclose the curtain coil and spring barrel at either end. Prepunched for easy installation of hood.
      
5. Counterbalance assembly consists of a spring barrel, which serves as load-carrying beam, encases counter-balance mechanism, and provides axis around which curtain coils. (Deflection is limited to 0.03" per lineal foot of span.) If needed, barrel rings are involute shapes of malleable iron, or stamped steel, to assure proper counterbalance for all points of travel. Oil-tempered, torsion-type counterbalance springs are wound from heat-treated steel, provide accuracy in balancing door. Barrel plugs connect ends of springs to barrel and tension rod. Tension rod of steel shafting holds fixed ends of springs and carries torsional load of spring counterbalance.
      
6. Sheet metal hood covers curtain coil and counterbalance mechanism. 
      
7. Tension adjusting wheel is mounted outside bracket, on end of tension rod. It simultaneously applies and holds tension of counterbalance, makes adjustment simple.
     
8. Galvanized, prepainted curtain of minimum 24 gauge steel has interlocking slats with windlocks riveted to ends of alternate slats. Designed to with-stand 20 PSF windload. Note: Curtains are galvanized per ASTM A525, and prepainted to eliminate "white rust." Windlocks are rugged stamped galvanized steel or malleable iron. Pre-punched top slat holes cut field labor installation costs.

Available in No. 14 flat slat with 24, 22, 20 and 18 gauge steel.

For reduction of building costs and optimal control of heating/cooling energy losses through openings.

Standard flat design also utilizes foam-in place method for maximum insulating value.
   

• Neoprene hood baffle reduces air infiltration at header.
• Bottom bar weatherstrip also provides cushion at bottom of door.
• Vinyl guide weatherstrip at each jamb reduces air leakage between guide and curtain.
• For chain hoist, crank or motor operation only.
• Insulation thermal value-U = 0.12; R=8.62.

 Available with No. 2 and No. 17 (flat) 2" slats or No. 4 and No. 14 (flat) 3" slats. Intended for applications where UL-labeled 3-hr. Class A fire door protection is required, and the security and space efficiency of a service door is desired.

Note: Original counterbalance is maintained up to 85% after closure; and if door is raised for any reason, it will automatically close again.

Manual operation is standard for doors up to 12'4" in width and up to 10'4" in height. Fire doors exceeding these dimensions will be standard with chain hoist operation. Crank and motor operation (at additional cost) is optional.

Approval/Standard Compliances

• UL-1O (b) Approval.
• Factory Mutual Approval Standard 4100 (1990).
• Designed to comply with governing standard for installation defined in NFPA 80 (1990).
• New York Dept. of Buildings MEA 83-87.
• ULC-S1 04 Approval.
• ANSIA2.2
• ASTM E152
• NFPA 252

Rolling grilles offer total security, visibility, and ventilation, in a number of patterns and finishes for commercial, industrial, and institutional applications. Operation can be manual, crank, chain or motor-operated. Mounting can be self-supporting, square, structural tubes, or to the building structure.

Features 5/16" galvanized steel horizontal members, continuous from jamb to jamb, covered with aluminum tubes. Vertical links are aluminum. Special end links insure that grille cannot be pulled from guides.

Curtain bottom is stiffened with tubular extruded aluminum member, fitted with nylon end caps which act as bearing surfaces. 
Lock assembly in bottom bar activates concealed 3/8" steel tamper-proof locking rods. Mechanism is removable when grille is open. Lock uses standard mortise cylinder, which offers security but is quickly removable for key changes.

Available as single units up to 60 ft. wide. Same construction quality as rolling doors.

Clean line patterns available with aluminum grilles in mill, clear or color anodized finishes, in mill or #4 finish stainless steel, or in galvanized steel.

Scissor grilles combine beauty, security and design flexibility, with the economy of a side stacking and manual operation. Uses top-hung curtain and pendant rollers in an extruded aluminum track, to eliminate floor track. 

Available as single slide up to 20 feet widths, biparting in widths up to 40 feet. For optimum operation, height from finished floor to underside of track should not exceed 10'O". Can move through 450 or 900 turns, with standard radius of 18".

Fabricated with steel inner rods, covered with aluminum tubes, and connected with horizontal links. Available in a variety of clear or color anodized finishes or mill finish. Security is provided by cylinder locks in leading stile, and cane-bolt locking at each floating mullion.

For use wherever maximum visibility is desired. The side coiling grille provides excellent security and yet is decorative. Minimum headroom is needed with no loss of valuable floor space. 

Grilles are available in aluminum or stainless steel. Aluminum grilles can be supplied with a mill finish or a clear or color anodized finish.

Features:

• Positive drive mechanism without springs
• Bottom track can be eliminated for wood doors
• No-sag cable system
• Automatic floor track sweeper
• Sealed ball bearing rollers
• Cable drive unit-jam proof
• Cable retainers prevent jumping
• Versatile drive mountings
• Full line of curtain materials
• Pre-assembled coil box with pad at each corner

Basically a rolling door in miniature design, operation, and manner of installation, these rolling counter shutters provide a neat curtain comprised of slats of extruded aluminum, roll-formed galvanized steel or stainless steel. 

They harmonize with virtually any building decor and provide good protection against pilferage or unauthorized entry.

Each shutter is custom built to fit openings up to maximum sizes and may be operated by push-up, awning crank or motor operator.