1 Scope

NOTE This Standard covers the design, materials, fabrication, and installation of overhead coiling grilles: upward-coiling open-mesh curtain assemblies that close an opening while remaining visually open and ventilated. (1.1)

NOTE An overhead coiling grille consists of a curtain of horizontal rods linked by vertical members that coils onto a barrel above the opening, guides at each jamb, a bottom bar, an operator, and a coil hood or housing. The closed curtain is approximately 75 to 80 percent open, which is the defining property that separates a grille from a door. (1.2)

1.3 This Standard applies to coiling grilles used as storefront security closures, shopping-mall storefront and demising closures, interior tenant-separation grilles, parking-structure entries, and light-duty industrial openings.

1.4 This Standard applies to new construction and to replacement of an existing grille in any project type requiring a roll-up security closure that remains open when deployed.

1.5 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.

1.6 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 Overhead Coiling DoorsOverhead Coiling DoorsResolves to the current edition.sync/overhead-coiling-doors shall be specified instead.

NOTE This Standard does not cover: opaque rolling-steel (coiling) doors (Overhead Coiling DoorsOverhead Coiling DoorsResolves to the current edition.sync/overhead-coiling-doors); hinged-panel sectional overhead doors with horizontal tracks (Sectional Overhead DoorsSectional Overhead DoorsResolves to the current edition.sync/sectional-overhead-doors); swing-door leaves, frames, and finish hardware (Doors Frames And HardwareDoors, Frames, and HardwareResolves to the current edition.sync/doors-frames-and-hardware); automatic swing or sliding pedestrian entrances (Automatic Entrance DoorsAutomatic Entrance DoorsResolves to the current edition.sync/automatic-entrance-doors); all-glass storefront entrance systems (All Glass EntrancesAll-Glass Entrances and DoorsResolves to the current edition.sync/all-glass-entrances); fixed wire-mesh partitions used as interior security cages or equipment enclosures (Wire Mesh PartitionsWire Mesh PartitionsResolves to the current edition.sync/wire-mesh-partitions); metal gratings used as floor or walkway surfaces (Metal Gratings And Floor PlatesMetal Gratings and Floor PlatesResolves to the current edition.sync/metal-gratings-and-floor-plates); or custom metal fabrications that are not manufactured as listed door assemblies (Metal FabricationsMetal FabricationsResolves to the current edition.sync/metal-fabrications). (1.7)

2 Referenced Standards

2.1 Equipment, materials, and installation shall comply with the latest adopted edition of each of the following unless a specific edition is cited or the Authority Having Jurisdiction has adopted a different edition.

2.2 Where referenced standards conflict, the more stringent requirement shall govern unless the Engineer of Record directs otherwise in writing.

Standard	Title
UL 325	Door, Drapery, Gate, Louver, and Window Operators and Systems
UL 10B	Fire Tests of Door Assemblies
NFPA 80	Fire Doors and Other Opening Protectives
NFPA 101	Life Safety Code
IBC	International Building Code (Section 716, Opening Protectives)
ASTM A653/A653M	Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated by the Hot-Dip Process
ASTM B209	Aluminum and Aluminum-Alloy Sheet and Plate
ASTM B221	Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes
ASCE 7	Minimum Design Loads and Associated Criteria for Buildings and Other Structures
AAMA 611	Anodized Architectural Aluminum
AAMA 2603	Pigmented Organic Coatings on Aluminum Extrusions and Panels
AAMA 2604	High Performance Organic Coatings on Aluminum Extrusions and Panels
DASMA TDS-254	Guidelines for Installation of Rolling Steel Fire Doors
DASMA TDS-297	Fire Related Standards and Rolling Steel Fire Door Ratings

3 Submittals

3.1 Action Submittals

3.1.1 The Contractor shall submit the following action submittals for review and approval before fabrication:

Product data for each grille type, including curtain material, rod diameter, pattern, link spacing, open-area percentage, operation type, and cycle rating.
Shop drawings showing each opening, with field-verified dimensions, mounting arrangement, guide type, coil and hood dimensions, bottom-bar profile, anchorage, and required clearances.
Structural calculations for guide and bracket anchorage, signed and sealed by a professional engineer where wind, seismic, or wide-opening conditions require, including wind-load and seismic anchorage per ASCE 7.
Wiring diagrams for motorized units showing operator, controls, entrapment-protection devices, and interface points.
Finish samples for each exposed color and finish, with anodize class or powder-coat performance class identified.
Fire-rating documentation for rated assemblies, including the UL 10B listing and the listed assembly size range.

Action submittals requiredcheckbox

☑ Product data

☑ Shop drawings (field-verified)

☐ Structural / anchorage calculations

☐ Wiring diagrams (motorized)

☑ Finish samples

☐ Fire-rating listing documentation

3.2 Closeout Submittals

3.2.1 The Contractor shall submit the following closeout submittals before Substantial Completion:

Operation and maintenance manuals covering lubrication, adjustment, and troubleshooting.
Manufacturer's written warranty.
Fire-door installation and inspection certificate per NFPA 80 for each rated assembly.
Record drawings showing as-installed dimensions, anchorage, and control locations.

Closeout submittals requiredcheckbox

☑ Operation and maintenance manuals

☑ Manufacturer warranty

☐ NFPA 80 installation / inspection certificate

☐ Record drawings

3.3 Informational Submittals

3.3.1 The Contractor shall submit the following informational submittals:

Manufacturer's installation instructions, including DASMA TDS-254 guidance for rated assemblies.
Maintenance and inspection instructions, including the fire-door annual-inspection procedure per NFPA 80 Section 5.2.
Qualification statements for the installer.

Informational submittals requiredcheckbox

☑ Installation instructions

☑ Maintenance / inspection instructions

☐ Installer qualifications

4 Quality Assurance

4.1 The grille manufacturer shall be a firm regularly engaged in the manufacture of overhead coiling grilles of the type and size required, with a record of successful in-service performance.

4.2 The installer shall be the manufacturer's authorized representative or a firm trained and approved by the manufacturer for the products being installed.

4.3 Fire-rated assemblies shall be installed by an installer qualified to install listed fire-door assemblies in accordance with NFPA 80.

4.4 Each grille shall be the product of a single manufacturer to maintain consistency of curtain, guides, operator, and finish across the project.

4.5 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.

4.6 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.

5 Environmental and Service Conditions

5.1 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 Mill-finish aluminum corrodes rapidly in coastal, high-humidity, and food-service environments. (5.2)

5.3 Aluminum curtains in coastal, high-humidity, and food-service environments shall be anodized or otherwise corrosion-protected.

5.4 Aluminum curtain rods used in exterior or high-humidity applications shall be anodized or otherwise corrosion-protected, not left as mill finish.

5.5 Stainless steel curtains shall be specified for high-humidity, food-service, wash-down, or coastal environments where galvanized steel or anodized aluminum will not provide adequate corrosion resistance.

5.6 Motorized operators in exterior, wash-down, or corrosive locations shall be enclosure-rated NEMA 4 or NEMA 4X; a NEMA 1 operator shall not be used in those locations.

Service environmentradio

● Interior, conditioned

○ Interior, high-humidity or food-service

○ Exterior, sheltered

○ Exterior, exposed

○ Coastal / corrosive

Motorized operator enclosure ratingradio

● NEMA 1 (interior, dry)

○ NEMA 4 (washdown, indoor)

○ NEMA 4X (corrosive, exterior)

6 Fire Rating

NOTE Whether a grille must be fire-rated is determined by the fire-resistance rating of the wall it occupies and the opening-protective rating required by IBC Section 716 for that wall and occupancy; it is not a discretionary upgrade. (6.1)

6.2 Where the grille closes an opening in a fire-resistance-rated wall, it shall be a fire-rated assembly listed and labeled to UL 10B and installed in accordance with NFPA 80.

6.3 A fire-rated grille shall be provided with automatic closure on a fire signal, by fusible link or by electric release, in accordance with NFPA 80.

6.4 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.

6.5 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.

Fire rating requiredradio

● Non-rated

○ 20 minute

○ 45 minute

○ 1 hour (3/4 hr label)

○ 1.5 hour (90 min)

Fire-rated automatic closure methodradio

● Not applicable (non-rated)

○ Fusible link (thermal)

○ Electric release (fire alarm interface)

7 Curtain

NOTE The curtain is the visible, load-bearing face of the grille: horizontal rods spanning the opening, joined at intervals by vertical links and spacer sleeves, forming the open mesh that gives the grille its visibility and ventilation. (7.1)

7.2 Curtain Material

7.2.1 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.

7.2.2 Galvanized steel curtain rods shall conform to ASTM A653/A653M.

7.2.3 Aluminum curtain rods and links shall conform to ASTM B209 for sheet and plate components and to ASTM B221 for extruded components.

7.2.4 Stainless steel curtains shall use 300-series stainless steel for rods, links, and sleeves.

Curtain materialradio

● Galvanized steel

○ Aluminum (alloy 5056-H32)

○ Stainless steel (300 series)

○ Powder-coated steel

7.3 Curtain Pattern

NOTE The curtain pattern determines visual openness, security level, and airflow; a brick pattern staggers the link joints between courses, while a straight pattern aligns them vertically. (7.3.1)

7.3.2 The curtain shall be furnished in the specified pattern, with vertical link spacing selected so the closed curtain provides the required open area.

Curtain patternradio

● Brick pattern (6 in staggered)

○ Straight pattern (6 in)

○ Straight pattern (9 in)

Vertical link spacingradio

● 12 in o.c. (standard openness)

○ 9 in o.c. (tighter security)

Minimum curtain open arearange

%

7085

Default: 75 %

NOTE 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. (7.3.3)

7.4 Curtain Rods, Links, and Sleeves

7.4.1 Curtain rod diameter shall be selected for the required security level and span, with 5/16 in as the standard rod and 3/8 in for heavier-duty or higher-security openings.

7.4.2 Links and sleeves shall be aluminum on standard assemblies, and shall be upgraded to stainless steel where corrosion resistance or wear life requires.

7.4.3 All curtain links and sleeves shall be a consistent material throughout a single curtain to avoid galvanic corrosion between dissimilar metals.

Curtain rod diameterradio

● 5/16 in (standard)

○ 3/8 in (heavy-duty / high-security)

Link and sleeve materialradio

● Aluminum (standard)

○ Stainless steel (upgraded)

8 Bottom Bar

NOTE The bottom bar is the rigid member at the leading edge of the curtain that seals against the floor, carries the lock, and on motorized units carries the sensing edge. (8.1)

8.2 The bottom bar shall be a double-angle section, 2 x 2 x 1/8 in galvanized steel minimum, unless a heavier or material-matched section is required for the curtain material or width.

8.3 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.

8.4 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.

8.5 Where a pedestrian pass-door within the grille is required, the location and required reinforcement shall be shown on the drawings pass-door location.

Bottom bar typeradio

● Double-angle 2 x 2 x 1/8 in (standard)

○ Slotted for ADA threshold coordination

○ Reinforced for pass-door

9 Guides and Mounting

NOTE The guides are the vertical channels at each jamb that retain the curtain edges and transfer wind and impact loads into the structure; their type and anchorage govern the reveal, the jamb blocking, and the structural attachment. (9.1)

9.2 The mounting arrangement shall be coordinated with the rough opening, with face-of-wall mounting for surface installation and between-jamb (pocket) mounting where a recessed, concealed appearance is required.

9.3 The guide type shall be coordinated with the available reveal depth, using surface-mounted angle guides where a surface reveal is acceptable and recessed guides where a flush jamb is required.

9.4 Guide angles shall be structural steel not less than 3/16 in thick, anchored to the supporting structure in accordance with the manufacturer's sealed structural calculations.

9.5 Guide anchors to masonry or concrete shall be embedded or through-bolted and sized by calculation.

NOTE A generic anchorage note does not satisfy the Authority Having Jurisdiction for guide anchor design. (9.6)

9.7 In Seismic Design Category C and higher, guide and bracket anchorage shall include pull-out and seismic calculations per ASCE 7.

9.8 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.

Mounting arrangementradio

● Face-of-wall

○ Between-jamb (pocket mount)

Guide typeradio

● Surface-mounted angle guides

○ Recessed guides (flush jamb)

Seismic anchorage calculationsradio

● Not required (SDC A or B)

○ Required per ASCE 7 (SDC C and higher)

10 Coil Hood and Housing

NOTE The coil hood encloses the coiled curtain and barrel above the opening; it protects the coil, conceals the mechanism, and contributes to weather and vandal resistance. (10.1)

10.2 A coil hood or enclosed housing shall be provided where the coil is exposed to weather, accessible to vandalism, or visually prominent.

10.3 The hood material and finish shall match the curtain material and the specified finish unless the drawings indicate a concealed coil above a finished ceiling.

Coil enclosureradio

○ Open coil (concealed above ceiling)

● Enclosed hood cover

11 Operation

11.1 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.

11.2 Manual Operation

11.2.1 Manual grilles shall be furnished as hand-lift for small, balanced openings or as chain-hoist for larger or heavier curtains.

11.2.2 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.

Manual operation typeradio

○ Not applicable (motorized)

○ Hand-lift

● Chain-hoist

11.3 Motorized Operation

11.3.1 Motorized grilles shall be furnished with a tubular or jackshaft operator sized for the curtain weight, opening size, and cycle frequency.

11.3.2 The operator shall be single-phase or three-phase as coordinated with the available building power.

11.3.3 Every motorized operator shall be provided with an emergency manual release that allows operation on loss of power.

11.3.4 Operator power and control interface shall be coordinated with the available building power and any building-automation or access-control interface.

Operator powerradio

○ Not applicable (manual)

○ Single-phase 120V

○ Single-phase 208-240V

● Three-phase 208-240V

○ Three-phase 480V

Control interfacecheckbox

☐ Key switch

☑ Push-button station

☐ Building-automation (BAS) interface

☐ Access-control interface

11.4 Entrapment Protection

11.4.1 Every motorized grille operator shall comply with UL 325 for entrapment protection.

11.4.2 Each motorized grille shall be provided with a primary entrapment-protection device, by photo eyes or a sensing edge, in accordance with UL 325.

Entrapment-protection devicecheckbox

☑ Photo eyes

☑ Sensing edge (bottom bar)

☐ Safety light curtain

11.4.3 Exterior photo eyes shall be rated NEMA 4X for the exposure.

NOTE 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. (11.4.4)

12 Cycle Rating and Performance

12.1 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 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. (12.2)

12.3 High-traffic retail, transit, and parking applications shall use a high-performance grille rated for 300,000 cycles or more.

12.4 High-performance (compact-coil) grilles shall be specified where a shallow header, high cycle count, or high operating speed is required.

Cycle ratingradio

● Standard (~50,000 cycles)

○ High-performance (300,000+ cycles)

○ High-performance extreme (500,000-600,000 cycles)

Motorized operating speedrange

in/sec

624

Default: 10 in/sec

13 Wind Load

13.1 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.

13.2 The grille shall be designed for the static design wind pressure determined for the opening per ASCE 7 for the project location and exposure.

13.3 Standard grilles are rated to approximately 10 psf static; coastal and high-exposure locations shall use an engineered grille rated to the calculated pressure, up to 40 psf static for high-performance models.

13.4 Motorized high-performance grilles intended to operate under wind shall be rated for the operable wind pressure, up to approximately 20 psf, in addition to the static rating.

Static wind-load ratingrange

psf

1040

Default: 10 psf

Engineered wind-load calculation packageradio

● Not required (standard 10 psf)

○ Required per ASCE 7 (engineered)

14 Opening Size

NOTE Standard production grilles are limited in size, and openings beyond the standard range require engineered or custom assemblies coordinated with the manufacturer. (14.1)

14.2 The grille width and height shall be confirmed against the manufacturer's standard size range, with engineered assemblies provided where the opening exceeds the standard limits.

14.3 Standard models cover openings up to approximately 20 ft wide and 14 ft high; wider or taller openings, up to approximately 30 to 40 ft wide and 20 ft high, require engineered or custom assemblies.

Opening widthrange

ft

440

Default: 12 ft

Opening heightrange

ft

420

Default: 10 ft

15 Finish

15.1 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.

15.2 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.

15.3 Powder-coat finishes shall comply with AAMA 2603 for interior or economy applications and AAMA 2604 for exterior or commercial applications.

15.4 Galvanized steel components shall be hot-dip galvanized where a bare protective finish is acceptable.

Finishradio

○ Mill aluminum

○ Clear anodized (AAMA 611 Class II)

○ Clear anodized (AAMA 611 Class I)

○ Color anodized (AAMA 611 Class I)

○ Hot-dip galvanized

● Powder-coat, interior (AAMA 2603)

○ Powder-coat, exterior (AAMA 2604)

Finish colortext

Enter value...

Per drawings — finish schedule

16 Locking

16.1 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.

16.2 The locking method shall be coordinated with the building's keying and access-control system where a cylinder or integrated motorized lock is specified.

16.3 Motorized grilles requiring positive security in the closed position shall use an integrated motorized lock rather than a manual bolt.

Locking methodradio

○ No lock

○ Slide bolt

● Cylinder lock

○ Integrated motorized lock

17 Testing

17.1 Factory Testing

17.1.1 Each grille shall be operationally cycle-tested at the factory before shipment to confirm smooth travel and correct curtain coiling.

17.1.2 Engineered wind-load assemblies shall be tested to the rated static pressure in accordance with the manufacturer's wind-load test protocol or the applicable DASMA guidance.

17.1.3 Fire-rated assemblies shall be of a design tested and listed to UL 10B.

17.2 Field Testing

17.2.1 After installation, each grille shall be operated through its full travel to verify smooth operation, correct limit settings, and proper seating of the bottom bar.

17.2.2 Each motorized grille shall be tested to confirm that the entrapment-protection devices stop and reverse or stop the curtain in accordance with UL 325.

17.2.3 Each fire-rated assembly shall be drop-tested and reset after installation to verify automatic closure.

17.2.4 Each fire-rated assembly shall be subject to the annual operational test required by NFPA 80 Section 5.2, including verification of fusible-link condition, automatic closing, and manual release.

Field tests requiredcheckbox

☑ Full-travel operation test

☐ UL 325 entrapment-protection test

☐ NFPA 80 fire-door drop test

☐ NFPA 80 annual operational test

18 Installation

18.1 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.

18.2 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.

18.3 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.

18.4 Guides and brackets shall be anchored to the supporting structure in accordance with the sealed structural calculations and the manufacturer's instructions, using the specified anchor type and embedment.

18.5 Fire-rated assemblies shall be installed in accordance with NFPA 80 and DASMA TDS-254, without field modification to the listed assembly.

18.6 Motorized operators, controls, and entrapment-protection devices shall be installed, wired, and adjusted by qualified personnel and tested before the opening is placed in service.

18.7 The opening location, swing of any associated doors, and clearances to adjacent construction shall be coordinated with the drawings grille opening location.

19 Delivery, Storage, and Handling

19.1 Grilles shall be delivered in the manufacturer's packaging, labeled to identify each opening, and protected from damage and weather during transport.

19.2 Grilles shall be stored indoors, off the floor, in a dry, ventilated space, and protected from construction traffic and from staining or abrasion of finished surfaces.

19.3 Curtains and finished components shall be handled to prevent bending of rods, distortion of links, and scratching of the finish.

20 Warranty

20.1 The manufacturer shall provide a written warranty against defects in materials and workmanship for the standard warranty period.

20.2 High-performance and high-cycle grilles shall carry a cycle-based or extended warranty appropriate to the rated cycle count.

20.3 The warranty shall state the coverage period, the components covered, and the maintenance required to keep the warranty in force.

Warranty period (materials and workmanship)range

years

15

Default: 2 years

21 Spare Parts

21.1 The manufacturer shall furnish spare parts and consumables appropriate to the operation type and service environment for owner maintenance.

21.2 For fire-rated assemblies, spare fusible links matched to the listed assembly shall be furnished for replacement at the intervals required by NFPA 80.

Spare parts to furnishcheckbox

☐ Spare fusible links (fire-rated)

☐ Spare sensing edge / photo eye

☐ Operator drive components

☑ Lubricant / maintenance kit