Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
---
title: Overhead Coiling Grilles
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## This Standard covers both non-fire-rated and fire-rated assemblies, manual and motorized operation, standard and high-cycle (high-performance) models, and curtains of galvanized steel, aluminum, or stainless steel.
−## A coiling grille is an open-mesh closure and does not provide a smoke, weather, thermal, or acoustic barrier. Where a continuous opaque barrier is required, an opaque rolling-steel door under [[sync/overhead-coiling-doors]] shall be specified instead. {note}
+## A coiling grille is an open-mesh closure and does not provide a smoke, weather, thermal, or acoustic barrier. Where a continuous opaque barrier is required, an opaque rolling-steel door under [[sync/overhead-coiling-doors]] shall be specified instead.
## This Standard does not cover: opaque rolling-steel (coiling) doors ([[sync/overhead-coiling-doors]]); hinged-panel sectional overhead doors with horizontal tracks ([[sync/sectional-overhead-doors]]); swing-door leaves, frames, and finish hardware ([[sync/doors-frames-and-hardware]]); automatic swing or sliding pedestrian entrances ([[sync/automatic-entrance-doors]]); all-glass storefront entrance systems ([[sync/all-glass-entrances]]); fixed wire-mesh partitions used as interior security cages or equipment enclosures ([[sync/wire-mesh-partitions]]); metal gratings used as floor or walkway surfaces ([[sync/metal-gratings-and-floor-plates]]); or custom metal fabrications that are not manufactured as listed door assemblies ([[sync/metal-fabrications]]). {note}
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## Fire-rated assemblies shall be installed by an installer qualified to install listed fire-door assemblies in accordance with NFPA 80.
−## Each grille shall be the product of a single manufacturer to maintain consistency of curtain, guides, operator, and finish across the project. {note}
+## Each grille shall be the product of a single manufacturer to maintain consistency of curtain, guides, operator, and finish across the project.
## Fire-rated grilles shall bear the label of a nationally recognized testing laboratory and shall be installed without field modification that would void the listing.
−## The listed dimensions of a fire-rated assembly are size-specific, and a field modification to fit a mismatched rough opening voids the listing; the listed assembly size range must be confirmed against the actual opening before order. {note}
+## The listed dimensions of a fire-rated assembly are size-specific, and a field modification to fit a mismatched rough opening voids the listing; the listed assembly size range must be confirmed against the actual opening before order.
# Environmental and Service Conditions {toc}
−## The curtain material and operator enclosure rating shall be selected for the service environment of each opening, accounting for exterior exposure, humidity, wash-down, coastal salt, and food-service conditions. {note}
+## The curtain material and operator enclosure rating shall be selected for the service environment of each opening, accounting for exterior exposure, humidity, wash-down, coastal salt, and food-service conditions.
## Mill-finish aluminum corrodes rapidly in coastal, high-humidity, and food-service environments. {note}
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## The fire-protection rating of the assembly shall be not less than the rating required by IBC Section 716 for the wall rating and occupancy at the opening.
−## A grille is an open-mesh closure and is not a smoke barrier; where the opening protective must also restrict smoke, a grille shall not be substituted for a listed smoke-rated assembly. {note}
+## A grille is an open-mesh closure and is not a smoke barrier; where the opening protective must also restrict smoke, a grille shall not be substituted for a listed smoke-rated assembly.
```datasheet
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## Curtain Material {toc}
−### The curtain material shall be selected for the required security level, corrosion environment, and appearance, from galvanized steel, aluminum, stainless steel, or powder-coated steel. {note}
+### The curtain material shall be selected for the required security level, corrosion environment, and appearance, from galvanized steel, aluminum, stainless steel, or powder-coated steel.
### Galvanized steel curtain rods shall conform to ASTM A653/A653M.
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### The curtain shall be furnished in the specified pattern, with vertical link spacing selected so the closed curtain provides the required open area.
−### Tighter vertical link spacing increases security and reduces hand and tool access through the curtain, at the cost of open area and visibility; wider spacing maximizes visibility and airflow. {note}
−
```datasheet
label: Curtain pattern
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```
+### Tighter vertical link spacing increases security and reduces hand and tool access through the curtain, at the cost of open area and visibility; wider spacing maximizes visibility and airflow. {note}
+
## Curtain Rods, Links, and Sleeves {toc}
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### Links and sleeves shall be aluminum on standard assemblies, and shall be upgraded to stainless steel where corrosion resistance or wear life requires.
−### All curtain links and sleeves shall be a consistent material throughout a single curtain to avoid galvanic corrosion between dissimilar metals. {note}
+### All curtain links and sleeves shall be a consistent material throughout a single curtain to avoid galvanic corrosion between dissimilar metals.
```datasheet
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## The bottom-bar clearance to finished floor in the closed position shall not exceed 0.5 in where the grille occurs in an accessible route, in accordance with the threshold provisions of IBC Section 1010.
−## Where a pedestrian pass-door (wicket door) within the grille is required, it shall be factory-built with reinforced bottom-bar and side members; pass-doors shall not be field-cut into a finished curtain. {note}
+## Where a pedestrian pass-door (wicket door) within the grille is required, it shall be factory-built with reinforced bottom-bar and side members; pass-doors shall not be field-cut into a finished curtain.
## Where a pedestrian pass-door within the grille is required, the location and required reinforcement shall be shown on the drawings [[drawing: pass-door location]].
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## In Seismic Design Category C and higher, guide and bracket anchorage shall include pull-out and seismic calculations per ASCE 7.
−## The coil-housing (barrel) depth and width shall be coordinated with the structural header or soffit framing; standard coils can require 12 to 18 in of clear depth above the opening, while compact-coil products exist for shallow-header conditions. {note}
+## The coil-housing (barrel) depth and width shall be coordinated with the structural header or soffit framing; standard coils can require 12 to 18 in of clear depth above the opening, while compact-coil products exist for shallow-header conditions.
```datasheet
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# Operation {toc}
−## The operation type shall be selected from the daily cycle count and the opening size, with manual operation for low-use openings and motorized operation for frequent use or large openings. {note}
+## The operation type shall be selected from the daily cycle count and the opening size, with manual operation for low-use openings and motorized operation for frequent use or large openings.
## Manual Operation {toc}
### Manual grilles shall be furnished as hand-lift for small, balanced openings or as chain-hoist for larger or heavier curtains.
−### Chain-hoist operation shall not be specified for openings wider than approximately 16 ft or taller than 12 ft without verifying that the required chain-pull force is within ergonomic and code limits, because chain-pull force can exceed 40 lbf on large grilles. {note}
+### Chain-hoist operation shall not be specified for openings wider than approximately 16 ft or taller than 12 ft without verifying that the required chain-pull force is within ergonomic and code limits, because chain-pull force can exceed 40 lbf on large grilles.
```datasheet
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### Every motorized operator shall be provided with an emergency manual release that allows operation on loss of power.
−### Operator power and control interface shall be coordinated with the available building power and any building-automation or access-control interface. {note}
+### Operator power and control interface shall be coordinated with the available building power and any building-automation or access-control interface.
```datasheet
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### Each motorized grille shall be provided with a primary entrapment-protection device, by photo eyes or a sensing edge, in accordance with UL 325.
−### Exterior photo eyes shall be rated NEMA 4X for the exposure.
−
−### Entrapment-protection devices required by UL 325 must be included in the motorized order, because retroactive installation after the operator is mounted is difficult and is commonly required by the Authority Having Jurisdiction. {note}
−
```datasheet
label: Entrapment-protection device
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```
+### Exterior photo eyes shall be rated NEMA 4X for the exposure.
+
+### Entrapment-protection devices required by UL 325 must be included in the motorized order, because retroactive installation after the operator is mounted is difficult and is commonly required by the Authority Having Jurisdiction. {note}
+
# Cycle Rating and Performance {toc}
−## The cycle rating shall be selected from the expected daily use, because a standard-cycle model will fail prematurely in a high-traffic application. {note}
+## The cycle rating shall be selected from the expected daily use, because a standard-cycle model will fail prematurely in a high-traffic application.
## Standard-cycle grilles, rated at approximately 50,000 cycles, are suitable for low-use storefronts; a standard model used at 60 or more cycles per day in a mall or transit application will fail within two to three years. {note}
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# Wind Load {toc}
−## The wind-load rating shall be selected for the project location and exposure; standard grilles are rated to a nominal static pressure, while engineered models carry higher pressures supported by calculation. {note}
+## The wind-load rating shall be selected for the project location and exposure; standard grilles are rated to a nominal static pressure, while engineered models carry higher pressures supported by calculation.
## The grille shall be designed for the static design wind pressure determined for the opening per ASCE 7 for the project location and exposure.
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# Finish {toc}
−## The finish shall be selected for the curtain material and the exposure, with anodize class and powder-coat performance class matched to interior or exterior service. {note}
+## The finish shall be selected for the curtain material and the exposure, with anodize class and powder-coat performance class matched to interior or exterior service.
## Anodized aluminum finishes shall comply with AAMA 611, Class I (0.7 mil minimum) for exterior exposure and Class II (0.4 mil minimum) for interior exposure.
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# Locking {toc}
−## The locking method shall be selected for the security requirement and the operation type, from no lock, slide bolt, cylinder lock, or integrated motorized lock. {note}
+## The locking method shall be selected for the security requirement and the operation type, from no lock, slide bolt, cylinder lock, or integrated motorized lock.
## The locking method shall be coordinated with the building's keying and access-control system where a cylinder or integrated motorized lock is specified.
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## The grille shall be installed in accordance with the manufacturer's written instructions and the approved shop drawings, plumb, level, and true to the opening.
−## The supporting substrate at the floor shall be level under the full width of the opening, because a sloped floor under a wide storefront grille causes binding and can void a fire-rated listing. {note}
+## The supporting substrate at the floor shall be level under the full width of the opening, because a sloped floor under a wide storefront grille causes binding and can void a fire-rated listing.
## The bottom-bar clearance and threshold shall be coordinated with the finished floor elevation so the curtain seats evenly across the full width of the opening.
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- Lubricant / maintenance kit
```