Microcoil® Grille | Compact Security Grilles | Cornell Iron

Name: MicroCoil Extreme® 300 Series | Compact Headroom Grille
Brand: Cornell Iron

High Performance Security Grilles

Model Number: EPG324C & EPG324CB

When you need security in an opening with limited vertical space, our Extreme High Performance MicroCoil® Grille - 500K Cycles is the answer. Perfectly engineered to occupy the smallest amount of headroom on the market, our high performance compact grille not only coils in nearly 50% less room than other security grilles, but also provides higher performance. The MicroCoil Grille is engineered to handle at least 500,000 cycles (opens/closes) at speeds of up to 24” per second. But, with the MicroCoil Grille, higher speeds do not mean you get a loud and clunky security grille. Our low headroom parking security grille’s patented nested link system actually minimizes noise and vibrations - making it one of the quietest and smoothest coiling parking garage gates available today.

In addition, ADA compliance is made easy. With most parking garage openings averaging 9’6”, accommodating parking spaces for 8’2” handicap accessible vans as required by ADA has become a huge challenge. Taking up less than 14” coiled grille headroom space at its largest (and often even smaller), the MicroCoil security grille allows almost any parking facility the opportunity to install rolling security grilles and still be in compliance.

Our compact parking lot security gates are easy to install in new construction as well as retrofit into existing parking structures. All high performance compact parking grilles are paired with our advanced Apex SmartController control panel, so programming and setting limits for your parking entrance gate is simple. This control panel will accept all activation systems. Safety is addressed with light curtains plus photo eyes to prevent potential harm or injury from the parking security grille. All compact parking grilles feature long lasting stainless steel links and a direct drive operator that eliminate sprockets and chains to wear or replace. Perimeter parts can be customized and your grille can be manufactured to exact specifications.

When a low headroom security solution is required, Cornell’s MicroCoil high performance compact grilles are the only security grilles that are low on space, but high on performance.

Technical Detail Information:
MicroCoil Brochure & Details Sheet Generate a Custom Drawing Architectural Assistance

Usage

The MicroCoil Grille is engineered to handle at least 500,00 cycles (open/closes) at speeds of up to 24" per second.

Standard Materials & Finishes

The Extreme High Performance MicroCoil - 500K Cycle offers an open-air design for increased visibility and ventilation. Curtains are assembled with a minimum solid 5/16 diameter, 5056 H32 aluminum alloy sleeved with horizontal aluminum or stainless steel tube spacers to separate vertical links on alternate rods with continuous end tube spacers. The vertical spacing is 2.5" to 3.7" on center. Vertical chains are solid 1/8" minimum stainless steel links, 1/4 inch wide, positioned by aluminum or stainless steel tube spacers on 9 inch centers. Nylon insert nuts are threaded on to the end of each rod to secure the chains.

Pattern options include:

Brick pattern (EPG324CB)
Straight pattern (EPG324C)

Curtains can come in the following finishes:

Mill
Clear Anodized
Stainless Steel

Extreme® Series Door Drive & Control System

This door features our first intelligent control panel - the Apex™ SmartController. It features:

Plug-and-play connections between the motor, control panel, and standard sensors
LCD screen that walks user through:
- Initial door commissioning
- Electrically set limits
- Status and error messages
- Many common door adjustments

This door also comes with a compact direct drive operator with no roller chains or sprockets and an internal inertia brake for safety. It is IP54 rated, which is equivalent to NEMA 3/3S.

Sizes

Our Extreme High Performance MicroCoil® Grille - 500K Cycles comes in the following standard height and width parameters:

If your maximum height is less than or equal to…	…your maximum width available is:
10’	26’ Stainless Steel Finish
14’	26’ Aluminum Finish

For openings that fall outside of the standard construction, please contact us

Videos

Testimonials

Check Out How We've Helped These Clients With Custom Closure Solutions:

"We are very pleased with the performance of the Cornell doors. Throughout the area, doors are blown out everywhere and the building we just moved from was destroyed. Here, our $2.3 million of inventory was saved. Being satisfied with the Cornelldoors is an understatement!"

ROGER WEIR, OPERATIONS MANAGER AT LEWIS BEAR COMPANY

"CornellCookson had installed a rolling door for us in our old building. We used it all the time and it’s held up really well over the years. Calling them in again made perfect sense. We are thrilled with how this door looks. The level of detail that’s been captured so clearly on this large door is incredible. It’s exceeded our expectations by far and will definitely do its job as a focal point in our new building."

MARK WORMAN, OWNER OF GRAVEYARD CARZ

"The existing grilles we had installed prior could not stand up to the cycle usage, and they needed a lot of maintenance. Cornell's Extreme Performance 324 grille is the right product, far superior to the other grilles we had in this opening before. We are really happy with the performance and will definitely purchase this product going forward, when the next opportunity arises."

MARK ARGABRIGHT, FACILITY MANAGER AT YOHN PROPERTY MANAGEMENT

"Not only was functionality a major concern, but we also needed a custom closure solution that worked with the overall exterior aesthetic of the building which is rooted in neighborhood context. We collaborated with CornellCookson to develop a solution that is both functional and architecturally sensitive."

EUGENE FLOTTERON, CETRARUDDY ARCHITECTURE

"The SteelWeave Metal Mesh Grille was the perfect solution to meet all of our needs. It complimented the design of the bar and lobby while adding some elegance. We could not be happier with the look and function of our CornellCookson SteelWeave Metal Mesh Grille and custom sliding panel."

DONALD FOX, FOX THEATERS

View Our Project Gallery for More Case Studies

Aesthetics

Hood and Operator Covers

Metal cover to protect the coil or operator from exterior weather, debris or to meet OSHA or UL 325 safety requirements.

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Powder Coating Grilles

Powder coat finish in more than 180 colors is available on perimeter components such as the aluminum bottom bar, hoods, wall angles, tubes and fascia. This finish is not available on the grille curtain.

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Sloping Bottom Bar

CornellCookson's new low profile sloping bottom bar for the Extreme MicroCoil Grille and Extreme 300 Series High Performance Grille allows for a continuous uniform grille versus the traditional, bulkier pitch plates giving your opening a highly aesthetic, finished look.

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Performance Upgrades

Vibration Isolators

Vibration Isolators effectively reduce the amount of vibration* caused by operation of doors and grilles.
*Vibration was reduced by 14% on doors and grilles with Vibration Isolators installed compared to doors and grilles without the system.
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LED Light Kit

The LED Light Kit provides a high-visible status indication for overhead doors and grilles. Designed for challenging environments like fire and emergency services, parking garages, and warehouses, the effective LED light strips limit downtime, maintenance, and repair costs.

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Seismic Performance Validation

We can provide project specific seismic calculations for all coiling doors that are mounted Face of Wall to steel or masonry. Seismic performance validation is per ASCE 7-05.

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Wind Load

Static Wind Load

Can be manufactured to withstand a static wind load of up to 40 psf. If wind load is not specified,the MicroCoil Grille will be manufactured to withstand a 20 ultimate wind load.

Operational Wind Load

Can be manufactured to withstand an operational wind load of up to 20psf.

Safety and Protection

Sensing Edge

Smoother Installation and easy maintenance: Designed with a flexible black rubber TPE material, our new sensing edge has two fins that conform to variations in the floor on both the interior and exterior of your door or grille. This ensures a secure seal without requiring you to overset the bottom door limit. The new sensing edge is easy to clean and remains free from rust and dirt stains, maintaining a fresh uniform appearance.

Edges are tested and listed to UL 10B as a component of the rolling steel fire door assembly.

Stronger weather protection: Featuring flexible 1" sealing fins, our sensing edges withstand the elements, providing maximum protection

Entrapment Protection Devices

Entrapment protection devices ensure that a motorized door or grille will not close on an object. If an object enters path of closure, the entrapment protection device will stop the door or grille from closing and return it to the fully open position.

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Monitored Protection, Even at High Speeds

UL 325-2010 (NEMA 4X) compliant photo eye sensors allow for momentary contact operation – useful in parking garages and other high use openings. Interruption of the photo eye beam before the door fully closes causes the door to immediately halt downward travel and reverse direction to return to the fully open position.

SafetyGard Light Curtain Technology

The 6’ tall light curtain is installed within the guide and blends into the guide construction. If the grille is cycling and an object passes through the curtain beams the door will immediately halt downward travel and reverse direction to return to the open position.

Grille Repairability

Link Repair Kit

If a single link gets damaged, you do not have to replace an entire section of the grille curtain. Simply make note of the number that is etched on the vertical link, order a link repair kit for the number link that is damaged and repair it in the field. It is a simple process to remove a damaged link and use the snap-on repair link - check out the full video tutorial.

Section Replacement

If a whole section gets damaged, it's easy and hassle free to repair. - check out the full video tutorial.

SmartSync Diagnostic Tool

Connect the SmartSync Diagnostic Tool to the APEX controller for instant door or grille diagnostics. This tool empowers field technicians and Electrical Support Specialists to effortlessly diagnose, repair, and resolve issues with the APEX controller—streamlining your workflows and helping customers get back to business.

Specification Sheets

MicroCoil Grille Specification

BIM Objects

MicroCoil Grille Face of Wall Mount

Drawing Generator

Need to see clearances and mounting details? Enter your opening dimensions into our Drawing Generator, and get custom generated drawings of your door with all the details.
MicroCoil Grille Drawing Generator