Commercial & industrial

Fire Rated Doors

Name: Integral frame and sill fire-rated counter doors
Brand: Overhead Door

FireKing rolling fire doors and fire-rated counter doors, sold and installed. The annual drop test has its own page.

We install every fire door from Century Avenue using our own crews across 11 Maryland counties. The annual drop test and inspection required by NFPA 80 is a separate service, performed and documented by our technicians (see Fire Door Drop Test). The line includes FireKing rolling fire doors 630, 631 and 634, the insulated FireKing 635, fire-rated counter doors 640 and 641, and integral frame and sill counter doors 660 and 662.

Overhead Door FireKing rolling fire doors 630, 631, 634 and 635 carry a 24-month limited warranty on all parts and components, with labor included for the first year. They carry three years or 20,000 cycles on the system when the door and its RHX or RSX fire door operator are bought and installed together. Fire-rated counter doors 640, 641, 660 and 662 carry a two-year limited warranty per their spec sheets. No separate warranty sheet covers them.

Annual drop testing: Fire Door Drop Test

An Overhead Door Company of Baltimore technician in a welding hood fitting a new dock leveler into its pit under an open dock door, the leveler deck raised on a chain

FireKing rolling fire door

Model 630

Model 630 is the standard FireKing rolling fire door. It is built for factories, warehouses, distribution centers and parking garages, with custom builds available for conveyor openings. Labels include UL or ULC 3-hour Class A on masonry or steel, and 1 1/2-hour Class B on non-masonry walls up to 152 sq ft. FM is optional. A UL oversize label covers doors up to 41 ft 2 in by 25 ft 4 in face of wall. The curtain is interlocking galvanized steel, curved C-187 or C-275 or flat F-265. Gauges are 22 gauge through 14 ft wide, 20 gauge to 20 ft, and 18 gauge to 24 ft, with stainless optional. A 165 F fusible link on each side of the wall releases the door. A viscous governor holds the descent between 6 and 24 in per second as NFPA 80 requires. The floor reset needs no tools after a drop test. Options include Fire Sentinel, FireLite vision lites and smoke detectors. Operation is push-up to 80 sq ft, floor resettable chain hoist or crank, or an RHX FK or RSX FDO operator. This is the fire door our technicians drop test and reset most often across Maryland.

At a glance

Size: Up to 41 ft 2 in wide by 25 ft 4 in high face of wall (683 sq ft); 24 ft by 24 ft between jambs
Rating: UL/ULC 3 hr Class A on masonry or steel, 1 1/2 hr Class B on non-masonry, to 152 sq ft; FM optional; UL oversize label above
Curtain: Galvanized steel C-187, C-275 or F-265; 22 gauge to 14 ft, 20 gauge to 20 ft, 18 gauge to 24 ft wide; stainless optional
Release: 165 F fusible link, viscous governor at 6 to 24 in per second; floor reset by one person, no tools; Fire Sentinel optional
Operation: Push-up to 80 sq ft, floor resettable chain hoist or crank; RHX FK or RSX FDO operator optional
Warranty: 24-month limited; 3 years or 20,000 cycles with the RHX or RSX operator

Per the current Overhead Door spec sheet; see the download.

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FireKing basic rolling fire door

Model 631

Model 631 is the basic FireKing fire door. It is a smaller door built for safety and economy, up to 14 ft wide by 12 ft high. Labels include UL, ULC or FM 1 1/2-hour or 3-hour up to 152 sq ft on masonry, steel or non-masonry walls, with a UL oversize label above that. The curtain is 24 gauge galvanized steel in curved C-187 or flat F-265 slats. Colors include Gray, Tan, White, Brown, or PowderGuard Premium in about 200 colors. It rides on bolted steel channel guides with a helical torsion spring counterbalance. Up to four FireLite vision lites are available in the F-265 slat. A UL-listed 165 F fusible link releases the door. The floor resettable hoist with a viscous governor brings it down at NFPA 80 speed and resets without tools. A Fire Sentinel time-delay release and smoke detectors are optional. Operation is push-up to 80 sq ft, floor resettable chain hoist or crank, with a UL-listed electric operator optional.

At a glance

Size: Up to 14 ft wide by 12 ft high
Rating: UL/ULC/FM 1 1/2 or 3 hr to 152 sq ft on masonry, steel or non-masonry; UL oversize label above
Curtain: 24 gauge galvanized steel, curved C-187 or flat F-265
Release: UL-listed 165 F fusible link, viscous governor; floor reset, no tools; Fire Sentinel optional
Operation: Push-up to 80 sq ft, floor resettable chain hoist or crank; UL-listed electric operator optional
Warranty: 24-month limited; 3 years or 20,000 cycles with the RHX or RSX operator

Per the current Overhead Door spec sheet; see the download.

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Pictured: a FireKing rolling fire door of the same series as the 634.

FireKing 4-hour rolling fire door

Model 634

Model 634 is the largest and highest rated FireKing fire door. It is built for public facilities, parking garages and warehouses. Ratings include UL 4-hour Class A up to 152 sq ft face mounted on masonry, and FM 4-hour Class A up to 144 sq ft. A UL oversize label is available up to 41 ft 2 in wide by 25 ft 4 in high (683 sq ft). Doors over 18 ft high are certified by FM. The curtain is 20 gauge galvanized steel in C-187, C-275 or F-265 slats through 20 ft wide, and 18 gauge C-275 or F-265 beyond. Options include 16 gauge or stainless steel, and a sloping bottom bar within UL limits for sloped floors. Release is the standard FireKing system: a 165 F fusible link, a planetary gear differential, a viscous governor dropping at 6 to 24 in per second, and a floor reset requiring no tools. Options include Fire Sentinel, FireLite vision lites, smoke detectors, horns and strobes. Operation is push-up to 80 sq ft, floor resettable chain hoist or crank, or an electric operator listed with the door (face of wall only).

At a glance

Size: Up to 41 ft 2 in wide by 25 ft 4 in high, 683 sq ft, face of wall
Rating: UL 4 hr Class A to 152 sq ft on masonry; FM 4 hr to 144 sq ft; UL oversize label above 152 sq ft; over 18 ft high certified by FM
Curtain: Galvanized steel C-187, C-275 or F-265; 20 gauge to 20 ft wide, 18 gauge C-275 or F-265 to 41 ft 2 in; 16 gauge or stainless optional
Release: 165 F fusible link, planetary gear differential, viscous governor at 6 to 24 in per second; floor reset, no tools; Fire Sentinel optional
Operation: Push-up to 80 sq ft, floor resettable chain hoist or crank; electric operator optional
Warranty: 24-month limited; 3 years or 20,000 cycles with the RHX or RSX operator

Per the current Overhead Door spec sheet; see the download.

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FireKing insulated rolling fire door

Model 635

Model 635 is the insulated FireKing fire door. It provides insulation, fire protection and sound reduction in one door, up to 24 ft wide by 24 ft high. It is built for paint booths, record rooms, libraries, warehouses and shared business walls. The flat F-265i slat uses 24 gauge galvanized steel front and back around a 2.2 lb mineral wool fill. It provides an R-value of 4.5, STC 21 on the curtain, and a smoke and flame index of 5. Labels include UL 4-hour Class A on masonry, and UL or ULC 3-hour Class A and 1 1/2-hour Class B on non-masonry, up to 152 sq ft. FM is optional. A UL oversize label is available, along with an optional UL S smoke label with brush-type perimeter seals. A 165 F fusible link on each side of the wall, a planetary gear differential, and a viscous governor close the door at NFPA 80 speed. The floor reset requires no tools. Options include Fire Sentinel, FireLite vision lites, smoke detectors, horns and strobes. Every 635 is operated by chain hoist or crank, with an electric operator optional. Push-up is not available. It mounts face of wall or between jambs.

At a glance

Size: Up to 24 ft wide by 24 ft high
Rating: UL 4 hr Class A on masonry, UL/ULC 3 hr Class A, 1 1/2 hr Class B on non-masonry, to 152 sq ft; FM optional; UL oversize; optional S smoke label
Curtain: Insulated flat F-265i, 24 gauge galvanized front and back around mineral wool; R-value 4.5, STC 21 (curtain); 22 gauge or stainless optional
Release: 165 F fusible links both sides of the wall, planetary gear differential, viscous governor; floor reset, no tools; Fire Sentinel optional
Operation: Floor resettable chain hoist or crank, no push-up; electric operator optional
Warranty: 24-month limited; 3 years or 20,000 cycles with the RHX or RSX operator

Per the current Overhead Door spec sheet; see the download.

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Fire-rated counter doors

Models 640 and 641

Models 640 and 641 are fire-rated counter doors built for factories, schools, concessions, hospitals, cafeterias and retail. Labels include UL or ULC 3-hour Class A on masonry or steel jambs, and 1 1/2-hour Class B on non-masonry walls. FM is optional with the flame baffle hood. The curtain uses flat F-158 slats up to 14 ft wide. The 640 is 22 gauge primed galvanized steel. The 641 is 22 gauge No. 4 stainless steel. The fusible link separates at 165 F, or 212 F where ambient temperature exceeds 100 F. The door closes under governor control in compact box guides that expand upward in a fire. Options include UL brush smoke seals, FireLite vision lites, smoke detectors, a 1 1/2-hour laminated counter top, and a Fire Sentinel time-delay release. Operation is push-up or crank with slide bolt locking, or an electric operator that requires no tension reset after a drop test or power loss. Our technicians test these on the same annual NFPA 80 schedule as rolling doors across 11 Maryland counties.

At a glance

Models: 640 primed galvanized; 641 No. 4 stainless steel
Size: Openings through 14 ft wide; height per the spec sheet
Rating: UL/ULC 3 hr Class A on masonry or steel jambs, 1 1/2 hr Class B on non-masonry; FM optional; 20-minute UL smoke label to 12 ft by 10 ft
Curtain: Flat F-158 slats, 22 gauge galvanized (640) or 22 gauge stainless (641)
Release: 165 F fusible link, 212 F for ambient over 100 F; governor-controlled descent; Fire Sentinel 10-second delay optional
Operation: Push-up or crank with slide bolt lock; electric operator optional, no tension reset after a drop test
Warranty: Two-year limited, per the spec sheet

Per the current Overhead Door spec sheet; see the download.

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Integral frame and sill fire-rated counter doors

Models 660 and 662

Models 660 and 662 are integral frame and sill fire-rated counter doors. They are factory assembled with fully welded frames for a finished look at food service counters, cafeterias, concessions and retail. They cover openings up to 9 ft 5 in wide by 4 ft 5 in high. They carry a UL 1 1/2-hour Class B label for masonry or non-masonry walls. On the 660, the interlocking 22 gauge flat slats, frame, guides, bottom bar and hood are all No. 4 stainless steel. The 662 uses a 22 gauge galvanized curtain in gray baked-on polyester inside the same 16 gauge stainless frame. On both, the 14 gauge stainless sill is enclosed and packed with fireproof acoustic filler. The assembly mounts between jambs. The fusible link separates at 165 F, or 212 F where ambient temperature exceeds 100 F. The door closes under governor control. Options include UL brush smoke seals, photoelectric or ionization smoke detectors, a cylinder locking bottom bar with mortise cylinders, and a Fire Sentinel time-delay release. Operation is manual push-up with coil-side padlockable slide locks, or crank.

At a glance

Models: 660 all stainless; 662 galvanized curtain in a stainless frame
Size: Up to 9 ft 5 in wide by 4 ft 5 in high
Rating: UL 1 1/2 hr Class B, masonry or non-masonry walls
Curtain: 22 gauge flat slats, No. 4 stainless (660) or gray polyester galvanized (662); 16 gauge stainless frame, 14 gauge stainless sill
Release: 165 F fusible link, 212 F for ambient over 100 F; governor-controlled descent; Fire Sentinel optional
Operation: Manual push-up, mounted between jambs; crank optional
Warranty: Two-year limited, per the spec sheet