Rolling Grilles

• Cornell can manufacture and ship most standard grilles in one to two weeks.
• Size Flexibility – each unit is built to exact opening size requirements.
• Compact Storage – curtain stores in an overhead coil that is totally supported by extensions of the side guides.
• Durability – commercial duty design.
• Maintenance – little to none.
• Repairs – job records are retained and parts are readily available.

• Hoods and fascias
• Cylinder locks with or without an interior thumbturn
• Bottom bar sensing edge for motorized units
• Operator covers for exterior mounted units or exposed operators below 8’-0” high
• Emergency manual release system
• Motor mounted interlock device

Brackets

Minimum 3/16” steel plates bolt to guide supporting member and support counter balance shaft and curtain. Standard Material & Finish: steel, with SpectraShield® powder coating Cornell gray

Counter-balance Shaft

4-1/2” minimum diameter outer shaft and 1-1/4” minimum inner shaft. This assembly supports the curtain and contains counter-balance torsion springs for assisting operation. Standard Material: steel

Optional Hood & Fascia

(not normally provided when unit is concealed above a ceiling) Protective sheet metal enclosure for the curtain. Standard Material & Finishes: Galvanized steel with exclusive GalvaNex® finish light gray or aluminum in mill, clear and color anodized or 300 series stainless steel with a #4 finish.

Guides

Extruded aluminum sections equipped with polypropylene pile runners and mounting member. Support the entire weight of the unit. Standard Material & Finish: mill finish aluminum. Optional Finishes: clear and color anodized aluminum

Curtain

A series of: straight pattern horizontal rods and chains OR horizontal rods and tube spacers with vertical links in a brick pattern OR rods with glazed polycarbonate panels between molded nylon links. See complete curtain description on front page. Standard Material & Finish: mill finish aluminum. Optional Materials: stainless or galvanized steel (VisionAire ESG10 and VistaGard only)

Self-Supporting Installation Option

Many grille installations utilize structural steel tubes for support, which allows for installation prior to the walls and ceiling being built. The tubes are factory prepared for the attachment of all grille components. Tubes are attached to the floor slab below and the joists above, thereby becoming self-supporting.

Operation

Push-up operation shown. Hand crank, chain and motors are available. Grilles operate by rotating the shaft gear end. The opposite end of shaft applies spring tension and is equipped with a spring adjusting wheel.

Bottom Bar

2” x 3 ½” heavy duty extruded aluminum tubular section that houses optional locking mechanisms. For widths greater than 27’ 4”, the bottom bar is reinforced with 3” x 2” x 3/16” aluminum angle(s). Standard Material & Finish: mill finish aluminum. Optional Material: stainless steel angles

Mounting Clearances

Between Jambs Self-Supporting

Mounts to structural tubes that are attached to the floor slab and braced to the structure above.

Between Jambs Conventional

Mounts within the opening fascia (front hood closure piece) required.

Face of Wall

Maintains clearance of full opening, minimal exposed components. Rolling grills are built to order to fit specific dimensions up to 40’ wide, 20’ high standard construction. Larger openings: consult factory.

• Manual Release System for use with motorized grilles to meet building grilles to meet building code exit requirements. Wall mounted pull handle disengages the motor allowing grille to partially open for egress.
• Motor Mounted Interlock – an overload sensing device that prevents damage if motor operation is attempted when the grille is locked. Field wired guide mounted interlocks are no longer necessary.
• EZ Lift Package – extends manual push-up operation by about 33%. Push-up VisionAire® aluminum grilles are available up to 22’ wide by 10’ high.

• High Cycle Construction – for grilles that will cycle more than 5 times per day, such as parking garages and sally port openings, Cornell recommends Model ESG12 brick pattern configuration. An alternative construction is Cornells’s SentryGate® grille.
• High Cycle Springs – heavy duty springs manufactured to withstand cycles of 50,000 or 100,000.
• Combination Doors – combines two different curtains on the same opening. Typically, an insulated door is used in conjunction with either an open design rolling grille or a ScreenGard® door.
• Fixed Panels – grille curtain can be mounted in a fixed frame assembly to be installed near a rolling grille curtain or separately.
• Sloping or Irregular Sills – special bottom bar designs meet odd floor conditions including slopes, curbs or rails.
• Removable Guide Mullions – used for extra wide openings that require full access on a limited basis.

• Aluminum in clear or color anodized
• Stainless steel, 300 series #4 finish (VisonAire ESG10 and VistaGard only)
• Hot-dip galvanized steel rods (VisionAire ESG10 and VistaGard only)
• Powder coat finish on perimeter components in selected color (not available on curtains)