City Gates USA | Rolling Doors and Grilles and UL Fire Doors
Commercial Grille Doors - MM10
 

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MM10
SPECIFICATIONS

ROLLING DOORS - As manufactured by the City Gates Mfg. Corp., College Point, N.Y. shall be of service type and operated by means of either manual push-up, endless chain or motor.

CURTAIN - MM10 curtain construction will consist of a Straight 9" pattern with all exposed material to be aluminum. Continuous 5/16" horizontal rods spaced 2" o.c. are to be covered with tubular spacers to form a straight pattern. Continuous end links are designed to prevent the curtain from leaving the side guide rails.

BRACKET PLATES - Carry pipe counterbalancing shafts are made from steel plating not less than 3/16" thick. The drive end bracket plate is to be filled with a sealed ball bearing. Plates are to house ends of each grille coil.

BOTTOM BAR - MM10 will have an aluminum extruded tubular section or can be constructed from double aluminum angle iron.

GUIDES - MM10 guides are extruded aluminum that are filled with a plastic insert and wool pile to prevent steel to steel contact and reduce noise. They are attached with 3/8" bolts 30" o.c.

COUNTERBALANCE ASSEMBLY - to consist of tempered helical torsion springs with a 25% safety factor, mounted on shaped cast anchors, supported by a continuous solid torsion rod. This mechanism to be permanently lubricated and enclosed within a steel pipe shaft. Deflection of shaft not to exceed .03" per lin. in. The spring tension adjusting wheel is to be readily accessible from outside the bracket plate.

SPRING COUNTERBALANCE - Option for band type springs for smaller doors shall consist of flat blue steel wrapped around a 2" or 3" pipe shaft and mounted into a galvanized steel spring box.

HOOD GALVANIZED (OPTIONAL: SQUARE, HEXAGON OR ROUND) - #24 ga. steel. Formed to fit contour of brackets. 3/8" thick intermediate supports as required to prevent excessive sag. Optional phosphate or baked painted enamel.

OPERATION - Push-up, lift handles on bottom bar, removable awning-type crank, or motor operation: UL listed operator.

Options (see Motors Section) include: open drip-proof motor (removable without getting auxiliary hand chain or setting of limit switches); gear reducer (gears running in oil bath); auxiliary hand chain operator interlocked; UL listed thermal overload protection; electric brake and rotary limit switches; transformer with 24-volt control secondary; all integral electrical components pre-wired to terminal block removable electrical control panel; push-button station in NEMA1 enclosure.

LOCKING - Equip doors for locking by padlock from coil side. Padlocks by others. Slidelocks, pin-locks and cylinder locks optional.

FINISH - Steel surfaces to be shop painted with a coat of rust-inhibiting primer. Aluminum mill finished in 24R clear anodized (duranodic). Stainless steel finish to be #2B, #4. Call for color options and finish.

CURTAIN "T" BOTTOM BAR, TUBULAR OR DOUBLE ANGLE BOTTOM BARS ARE AVAILABLE

 
 
 

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CITY-GATES was chosen by a world wide leader in the construction management industry to provide overhead coiling doors to well known retail store chain in the South East. The slide show you are looking at is one of fifteen trailers that were needed to deliver 225 doors to various sites throughout the South Eastern United States. The customer placed an order for our Model CG300 rolling steel doors. All of the doors were constructed from 20 gage galvanized steel slats, angle iron bottom bars, angle iron guides, counter balanced torsion springs, chain hoist operated and motorized. The size of the doors ranged from 6 feet wide to 35 feet wide. Please contact our special contracts department if you have a similar requirement.