Commercial & industrial

Sectional Steel Doors

Name: Sectional warehouse doors
Brand: Overhead Door

Insulated and non-insulated sectional doors for commercial and industrial openings.

Every sectional steel door we sell is specified, installed and serviced from Century Avenue by our own crews, across 11 Maryland counties, from a single service bay door to a distribution building with a row of dock openings. A sectional door rises in hinged panels on tracks that carry it back along the ceiling, which is why it is the choice where insulation, windows or a finished interior matter and the building has the headroom for it. The whole Overhead Door line is here: Thermacore insulated doors from the AP 850 to the light-duty 598, the 400 series steel and insulated steel doors, the insulated steel-back 470 and the sectional warehouse doors.

Overhead Door Corporation warrants sectional steel doors 416 to 432 for one year on the door and ten years on the factory finish. Thermacore doors carry ten years against panel delamination (eight on the 598), with one year on all other components. A Thermacore door and its RSX, RMZ, or RHX operator bought and installed together carry a system warranty of three years or 20,000 cycles.

A wide white Overhead Door insulated sectional door with a row of windows, seen from inside the building with its torsion springs and jackshaft operator, installed by Overhead Door Company of Baltimore

Thermacore AP insulated sectional door

Model 850

Model 850 Thermacore AP is the advanced performance insulated sectional door. It is built for openings where climate control, durability, and easy maintenance come first: food and beverage storage, pharmaceutical plants, industrial manufacturing, and shipping docks. The 3 in panel is CFC-free and HCFC-free polyurethane foamed in place between 0.015 in galvanized steel skins. A dual barrier tongue and groove meeting rail acts as a 1 3/4 in thermal break, with a second PVC break at the end stiles. It delivers a tested installed U-factor of 0.07 and an R-value of 26. A factory-installed header seal, a dual-durometer PVC bulb bottom seal, and a curved wall angle close the perimeter. This keeps air infiltration to 0.21 cfm per sq ft at 25 mph and gives an STC rating of 22. An enhanced jamb seal and an EPDM outer bulb handle harsher environments. Continuous steel hinge strips let a hinge land anywhere on the section. The door runs as chain hoist or electric, left or right hand, up to 40 ft 2 in wide by 24 ft 1 in high. Thermal lites take insulated glass, tempered insulated glass, or multi-wall polycarbonate. The exterior comes in White, Brown, Almond, or Sandstone.

At a glance

Size: Up to 40 ft 2 in wide by 24 ft 1 in high
Construction: 3 in polyurethane panel, 0.015 in galvanized steel skins, microgroove textured; dual tongue and groove joint
Thermal: U-factor 0.07, R-value 26; STC 22; air infiltration 0.21 cfm/sq ft at 25 mph
Best for: Food and beverage, pharmaceutical, climate-controlled and industrial buildings, government, shipping and receiving docks
Operation: Pull rope to 84 sq ft, chain hoist above; electric operator optional
Warranty: 10-year delamination, 1-year door; 3 years or 20,000 cycles with the operator

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

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Thermacore medium-duty insulated doors

Models 593 and 594

Models 593 and 594 are medium-duty Thermacore doors. The 593 is one of the best sellers in the line: strong, lightweight, and durable. They are perfect for projects that need a thermal door as energy efficient as it is good looking. Both use a 1 3/8 in steel-polyurethane-steel panel with a hot melt thermal break and an EPDM seal in the shiplap joint. They deliver a U-factor of 0.15 and an R-value of 12.76, with air infiltration of 0.15 cfm per sq ft at 25 mph. Sizes run up to 20 ft 2 in wide by 16 ft 1 in high. The 593 carries a ribbed textured skin of 0.015 in galvanized steel in White, Gray, Tan, or Industrial Brown. The 594 uses a raised-panel wood-grain texture in White, Brown, Almond, Sandstone, or Terra Bronze, making it a popular choice for RV doors. Pull rope is standard, with a chain hoist or electric operator optional, on 10,000 cycle springs. High-usage components, thermal glazing, an aluminum full-view sash section, wind load options, and a 20-year Trinar fluoropolymer finish are available. Around Baltimore, this is the Thermacore door our crews put on service bays and smaller shops.

At a glance

Models: 593 ribbed, 594 raised panel wood grain
Size: Up to 20 ft 2 in wide by 16 ft 1 in high
Construction: 1 3/8 in polyurethane panel; 0.015 in (593) or 0.012 in (594) galvanized steel skin; 20 gauge end stiles
Thermal: U-factor 0.15, R-value 12.76; air infiltration 0.15 cfm/sq ft at 25 mph
Best for: A broad range of medium-duty openings; the 594 where a decorative raised panel is wanted
Operation: Pull rope to 84 sq ft, chain hoist above; electric operator optional
Warranty: 10-year delamination, 1-year door; 3 years or 20,000 cycles with the operator; Trinar finish 20 years

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

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Thermacore light-duty insulated door

Model 598

Model 598 is the light-duty Thermacore door. It is the economical choice for lighter-duty openings that need a higher level of insulation than a standard insulated door. The 1 in panel is polyurethane foamed in place between 0.012 in galvanized steel skins. It is ribbed and textured, with a hot melt thermal break and a shiplap joint. It provides a U-factor of 0.20 and an R-value of 9.31, with air infiltration of 0.46 cfm per sq ft at 25 mph. Sizes run up to 16 ft 2 in wide by 14 ft 1 in high on 20 gauge end stiles. Pull rope is standard, with a chain hoist or electric operator optional. Thermal glazing, high cycle springs, wind load options, Posi-Tension drums, and jamb and header seals are available. The finish is White. The delamination warranty is eight years on this model rather than ten.

At a glance

Size: Up to 16 ft 2 in wide by 14 ft 1 in high
Construction: 1 in polyurethane panel, 0.012 in galvanized steel skins, ribbed textured; 20 gauge end stiles
Thermal: U-factor 0.20, R-value 9.31; air infiltration 0.46 cfm/sq ft at 25 mph
Best for: Lighter-duty openings where economy and energy efficiency matter equally
Operation: Pull rope to 84 sq ft, chain hoist above; electric operator optional
Warranty: 8-year delamination, 1-year door; 3 years or 20,000 cycles with the operator

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

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Thermacore extra heavy-duty insulated door

Model 596

Model 596 is the extra heavy-duty Thermacore door. It is built for openings that need both thermal efficiency and sound suppression. It is a solid, well-built door that keeps weather and unwanted noise out. The 2 in panel is polyurethane between 20 gauge galvanized steel skins, flush and textured, with a PVC thermal break and thermally broken 16 gauge end stiles. It delivers a U-factor of 0.10, an R-value of 17.40, and an STC rating of 26. Air infiltration is 0.13 cfm per sq ft at 25 mph, meeting IECC standards for both figures. Sizes run up to 36 ft 2 in wide by 24 ft 1 in high. Pull rope is standard, with a chain hoist or electric operator optional on 10,000 cycle springs. Options include thermal glazing, a four-section pass door, high-usage components, wind load packages, Posi-Tension drums, a bottom sensing edge, and jamb and header seals. Colors include White, Gray, Tan, or Industrial Brown.

At a glance

Size: Up to 36 ft 2 in wide by 24 ft 1 in high
Construction: 2 in polyurethane panel, 20 gauge galvanized steel skins, flush textured; 16 gauge end stiles
Thermal: U-factor 0.10, R-value 17.40; STC 26; air infiltration 0.13 cfm/sq ft at 25 mph
Best for: Extra heavy-duty openings that need thermal efficiency and sound suppression
Operation: Pull rope to 84 sq ft, chain hoist above; electric operator optional
Wind load: Wind load options to the project design pressure
Warranty: 10-year delamination, 1-year door; 3 years or 20,000 cycles with the operator

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

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Thermacore heavy-duty insulated doors, 2 in panel

Models 592 and 599

Models 592 and 599 are the heavy-duty Thermacore doors that perform on the numbers. They offer a U-factor of 0.10 and an R-value of 17.50, with air infiltration of 0.13 cfm per sq ft at 25 mph. They are the energy-efficient choice for the most demanding commercial work, high-cycle, wind load, and thermal applications alike. The 2 in panel is polyurethane foamed in place between 0.015 in galvanized steel skins. It features a PVC thermal break and thermally broken 16 gauge end stiles. The 592 is ribbed and textured. The 599 is flush and textured. Both run up to 40 ft 2 in wide by 32 ft 1 in high, the largest standard size in the Thermacore line. Pull rope is standard, with a chain hoist or electric operator optional. Thermal glazing, wind load options, a four-section pass door, high-usage components, Posi-Tension drums, and header and jamb seals are available. The 592 comes in White, Black, Industrial Brown, Tan, or Gray, with a 20-year Trinar finish optional. The 599 comes in White.

At a glance

Models: 592 ribbed, 599 flush
Size: Up to 40 ft 2 in wide by 32 ft 1 in high
Construction: 2 in polyurethane panel, 0.015 in galvanized steel skins; 16 gauge end stiles
Thermal: U-factor 0.10, R-value 17.50; air infiltration 0.13 cfm/sq ft at 25 mph; STC 20 (592)
Best for: Heavy-duty openings that demand thermal efficiency and wind resistance
Operation: Pull rope to 84 sq ft, chain hoist above; electric operator optional
Warranty: 10-year delamination, 1-year door; 3 years or 20,000 cycles with the operator; Trinar finish 20 years (592)

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

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Thermacore heavy-duty insulated door, 1 5/8 in panel

Model 591

Model 591 is the best-selling door in the Thermacore line and one of the most specified insulated sectional doors in the industry. It is a proven performer wherever an exceptional degree of thermal efficiency is required. The 1 5/8 in steel-polyurethane-steel panel is roll-formed from hot-dipped galvanized steel. It features a ribbed textured skin and a PVC thermal break. It carries a U-factor of 0.13 and an R-value of 14.86, with air infiltration of 0.08 cfm per sq ft at 25 mph. It meets the IECC 2015 C402.4 ceiling for operable fenestration. It is finished in two coats of baked-on polyester in White, Black, Tan, Gray, or Industrial Brown. It comes in wind load designs and takes a hinge anywhere along the panel for job-site customization, repair, or retrofit. Openings run up to 35 ft 2 in wide by 24 ft 1 in high. Side, center, or trolley operators, an aluminum sash section, thermal glazing, a four-section pass door, an impact bottom section, jamb weatherstripping, and high-usage components are optional. It is the insulated door our crews hang most on conditioned warehouses around Baltimore.

At a glance

Size: Up to 35 ft 2 in wide by 24 ft 1 in high
Construction: 1 5/8 in polyurethane panel, 0.015 in galvanized steel skins, ribbed textured; 16 gauge end stiles
Thermal: U-factor 0.13, R-value 14.86; air infiltration 0.08 cfm/sq ft at 25 mph
Best for: Warehouses, government facilities, manufacturing, automotive, food and beverage
Operation: Pull rope to 84 sq ft, chain hoist above; electric operator optional
Wind load: Wind load designs to the project design pressure
Warranty: 10-year delamination, 1-year door; 3 years or 20,000 cycles with the operator; Trinar finish 20 years

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

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Extra heavy-duty sectional steel door

Model 416

Model 416 is the strong, durable, and versatile door of the sectional steel line. It is built for commercial and industrial openings that call for an extra heavy-duty door for high security and frequent use. The 2 in panel is 16 gauge hot-dipped galvanized steel with a flush surface. Rabbeted meeting rails provide full-width interlocking rigidity on 16 gauge end and center stiles. Sizes run up to 32 ft 2 in wide by 21 ft 1 in high. Track is 2 in galvanized steel, fully bolted, with 3 in optional. Configurations include standard lift, lift clearance, full vertical, low headroom, and follow-the-roof. The counterbalance is a 10,000 cycle oil-tempered torsion spring, with 25,000 to 100,000 cycle springs optional. Pull rope is standard, with a chain hoist or electric operator optional. An interior slide lock, a flexible PVC bottom seal with retainer, and a two-coat baked-on polyester White finish are standard. Individual lites or full sash sections, reinforcing struts, movable center posts, an impact bottom section, and FBC approved wind load options are available.

At a glance

Size: Up to 32 ft 2 in wide by 21 ft 1 in high
Construction: 2 in panel, 16 gauge hot-dipped galvanized steel, flush; 16 gauge stiles; non-insulated
Best for: Public facilities, warehouses, government, manufacturing, security and automotive openings that need an extra heavy-duty door
Operation: Pull rope to 84 sq ft, chain hoist above; electric operator optional
Wind load: To the applicable code; FBC approval FL 11734 non-impact, to 32 ft 2 in wide by design pressure
Warranty: 1-year limited on the door, 10 years on the factory finish

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

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Extra heavy-duty insulated sectional steel door

Model 418

Model 418 is the extra heavy-duty insulated door built for heavy use, rough handling, and extreme conditions. It adds an extra measure of toughness to the sectional steel line. The 2 in panel features a 16 gauge hot-dip galvanized flush exterior over an expanded polystyrene core. It has a 26 gauge galvanized steel back cover, providing a calculated section R-value of 7.35. A poly-bonded laminate or high impact polystyrene back cover is optional. End and center stiles are 16 gauge, and the meeting rails are rabbeted for rigidity. Sizes run up to 30 ft 2 in wide by 21 ft 1 in high on 2 in galvanized track, with 3 in optional. The tight-fitting track stands up to wind loading. Springs are 10,000 cycle standard, with 25,000 to 100,000 cycle options. Pull rope is standard, with a chain hoist or electric operator optional. An interior slide lock, bottom seal, and White two-coat baked-on polyester finish inside and out are standard. Insulated lites, full sash sections, jamb and header seals, struts, movable center posts, and FBC wind load options are available.

At a glance

Size: Up to 30 ft 2 in wide by 21 ft 1 in high
Construction: 2 in panel, 16 gauge galvanized flush exterior, 26 gauge steel back cover; 16 gauge stiles
Thermal: Expanded polystyrene; R-value 7.35, calculated door section
Best for: Public facilities, manufacturing, automotive and healthcare openings with heavy use and rough handling
Operation: Pull rope to 84 sq ft, chain hoist above; electric operator optional
Wind load: To the applicable code; FBC approval FL 11734 non-impact
Warranty: 1-year limited on the door, 10 years on the factory finish

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

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Heavy and medium-duty sectional steel doors

Models 420, 424 and 430

Models 420, 424 and 430 are the ribbed non-insulated doors of the sectional steel line. The 420 and 424 are for heavy-duty use at distribution centers, service stations, and vehicle storage. The 430 is the medium-duty door for small warehouses and service stations. All three use a 2 in panel of hot-dipped galvanized steel on 16 gauge stiles. The 420 is 20 gauge up to 31 ft 2 in wide. The 424 is 24 gauge up to 30 ft 2 in wide. Both reach 24 ft 1 in high. The 430 is nominal 24 gauge up to 20 ft 2 in by 16 ft 1 in. Track is 2 in galvanized steel, with 3 in optional. Springs are 10,000 cycle, with higher-cycle options to 100,000. A flexible PVC bottom seal with retainer is standard. Pull rope is standard, with a chain hoist or electric operator optional. A slide lock, weatherstripping, reinforcing struts, movable center posts, glazing, and FBC wind load options are available. Finishes are White on all three. Industrial Brown is available on the 424 and 430, and Black is available on the 424. These are the doors our crews install most often on service bays and small warehouses.

At a glance

Models: 420 20 gauge, 424 24 gauge; 430 nominal 24 gauge, medium duty
Size: 420 to 31 ft 2 in by 24 ft 1 in; 424 to 30 ft 2 in by 24 ft 1 in; 430 to 20 ft 2 in by 16 ft 1 in
Construction: 2 in ribbed hot-dipped galvanized steel panel; 16 gauge stiles; non-insulated
Best for: Distribution centers, service stations and vehicle storage; the 430 for small warehouses
Operation: Pull rope to 84 sq ft, chain hoist above; electric operator optional
Wind load: To the applicable code; FBC approval FL 11734 non-impact (420 to 28 ft 2 in wide)
Warranty: 1-year limited on the door, 10 years on the factory finish

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

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Heavy and medium-duty insulated sectional doors

Models 422, 426 and 432

Models 422, 426 and 432 are the insulated versions of the ribbed steel doors. The 422 and 426 offer heavy-duty protection against the elements at loading docks, warehouses, and large openings. The 432 is an economical medium-duty insulated door for repair centers, vehicle storage, and smaller warehouses. Each is a 2 in panel with a ribbed hot-dip galvanized exterior over an expanded polystyrene core, providing an R-value of 7.35 as a calculated door section. They use 16 gauge stiles. The 422 is 20 gauge with a 26 gauge steel back cover, reaching 29 ft 2 in wide by 24 ft 1 in high. The 426 is 24 gauge with the same back cover, reaching 28 ft 2 in by 24 ft 1 in. The 432 is nominal 24 gauge with a poly-bonded laminate back cover, reaching 20 ft 2 in by 16 ft 1 in. Pull rope is standard, with a chain hoist or electric operator optional on 10,000 cycle springs. Insulated lites, full sash sections, struts, movable center posts, jamb and header seals, and FBC wind load options are available. Finishes are White on all three. Industrial Brown is available on the 426 and 432, and Black is available on the 426. Around Baltimore, these are the doors our crews quote first for a heated loading dock.

At a glance

Models: 422 20 gauge, 426 24 gauge; 432 nominal 24 gauge, medium duty
Size: 422 to 29 ft 2 in by 24 ft 1 in; 426 to 28 ft 2 in by 24 ft 1 in; 432 to 20 ft 2 in by 16 ft 1 in
Construction: 2 in ribbed galvanized steel panel; 26 gauge steel back cover (422, 426) or poly-bonded laminate (432); 16 gauge stiles
Thermal: Expanded polystyrene; R-value 7.35, calculated door section
Best for: Loading docks, warehouses and large openings; the 432 for repair centers and vehicle storage
Operation: Pull rope to 84 sq ft, chain hoist above; electric operator optional
Warranty: 1-year limited on the door, 10 years on the factory finish

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

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Sectional warehouse doors

Models 401, 402, 403, 404, 405 and 406

Models 401 to 406 are sectional warehouse doors. They offer a highly efficient design for strength and longevity in demanding commercial settings. A full 2 in section provides durability. The 401, 403, and 405 are non-insulated. The 402, 404, and 406 carry 1 5/16 in of expanded polystyrene behind a vinyl or steel backer, delivering an R-value of 7.64. The ribbed exterior is 20 gauge steel on the 401 and 402, 24 gauge on the 403 and 404, and nominal 24 gauge on the 405 and 406. Sections are joined tongue and groove in 19, 21, or 24 in heights. Sizes run up to 30 ft 2 in wide by 22 ft 1 in high on the 401 to 404, and 20 ft 2 in by 16 ft 1 in on the 405 and 406. Track is 2 in or 3 in with the horizontal run reinforced by a continuous angle. The vertical run is graduated for a wedge-tight close. They use 10,000 cycle springs, with 25,000, 50,000, and 100,000 cycle options. Push-up is standard up to 84 sq ft, with chain hoist above, and motor operation optional. Perimeter weatherseal, broken cable devices, safety edges, photo eyes, and vision or full-view lites are available. Finish is White on all models, with Brown on the 403 to 406. Stucco-embossed White or Brown is available on the 405 and 406.

At a glance

Models: 401, 403, 405 non-insulated; 402, 404, 406 insulated
Size: 401 to 404 to 30 ft 2 in by 22 ft 1 in; 405 and 406 to 20 ft 2 in by 16 ft 1 in
Construction: 2 in ribbed steel section, tongue and groove; 20 gauge (401, 402), 24 gauge (403, 404), nominal 24 gauge (405, 406)
Thermal: 1 5/16 in expanded polystyrene on the 402, 404 and 406; R-value 7.64
Best for: Demanding commercial and warehouse openings
Operation: Push-up to 84 sq ft, chain hoist above; motor operation optional
Warranty: 1-year limited