Commercial Grille Doors – MM10 MM10 Premium

This architectural grille uses premium clear aluminum components for exit and pedestrian walkways

MM10 - SPECIFICATIONS

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.

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.

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.

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