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​​​​​​​Advanced Rolling Steel Service Doors 621

rolling steel door on building

​​​​​​​​​​​​​​​​RapidSlat® Model 621

These advanced service doors are best suited to situations and applications with weather extremes. For example, agricultural facilities in the Midwest would benefit from the door’s rugged construction and weather sealed jambs.​

Standard max width
up to 30' (9246 mm) depending on gauge and slat type

Standard max height
up to 20' (6096 mm) depending on gauge and slat type

Interior or exterior face of wall

Control panel
Variable frequency drive controller with self-diagnostics (time delay self-close timer and non-resettable cycle counter included); LCD readout, enclosure NEMA 4X rated

Galvanized steel interlocking roll-formed slats, end locks attached to prevent lateral movement. Flat Profile type F-265 for doors up to 18'4" wide - 22 gauge; From 18'5" to 25'5" - 20 gauge; From 25'4" to 30'0" - 18 gauge

Curtain finish
Gray, tan or white PowderGuard® Max powder coat with hardening additive

Bottom bar
Two PowderGuard® Premium powder coated black angles (min. thickness 3/16”) with 2-wire, self-monitoring, fail safe, electric sensing edge

24 gauge galvanized steel primed, black painted; interior hood baffle included

Min. ¼” hot rolled primed, PowderGuard® Premium powder coated black steel

Three structural steel angles PowderGuard® Premium powder coated black

Door roll
Direct driven, springless roll with integrated shafts; self-aligning grease-able sealed bearings; door does not require counterbalance device

Safety devices
Built-in brake mechanism provides additional peace-of-mind against uncontrolled curtain travel

Wireless monitored safety edge - all doors are equipped with a mandatory reversing or sensing edge to prevent entrapment.

Photoelectric safety sensors with guards - provide additional safety during door operation to help prevent injury and damage

Direct drive, integrated gear motor/brake assembly (up to 24” per sec up speed / 12” per sec down speed); drive assembly and limit sensors are factory pre-assembled. Manual hand chain for power outage. Horsepower is appropriate to size and weight of door. 230V AC 3-phase motor

Single open/close/stop push button station incorporated into control panel

Wind load
20 psf when optional wear strips are not specified

5 year limited warranty coverage on all mechanical door system components and control panel hardware   

Door Options
​​Door Options​
  • Motor options: 208V AC 1PH, 220V AC 1PH, 208V AC 3PH, 230V AC 3PH, 460V AC 3PH, 575V AC 3PH
    (requires stand-alone mounted transformer)
  • Flat profile type F-265 for doors up to 30’ wide. Available in: 20, 18 gauge galvanized steel; 22, 20 gauge stainless steel; 16 gauge (.050”) aluminum*
  • Bottom bar also available in: galvanized steel, stainless steel and aluminum
  • High usage wear strips (not available with high wind load option)
  • Guide options include: galvanized steel and powdercoated steel
  • Hood also available in: powdercoat, stainless steel and aluminum.
  • Brackets also available in: powdercoat and galvanized steel
  • Direct drive motor options available in 220/240V AC 1-phase, 460 or 575V AC 3-phase. 575V AC requires additional transformer. Horsepower is appropriate to size and weight of door.
  • Dual photoelectric sensors available for safety
  • Optional push buttons, loop detectors, radio control, motion detectors, or any combination thereof available for door operation/control
  • PowderGuard® Max powder coat finish options are available in approximately 200 colors as well as custom matching to specification. On the RapidSlat® models, PowderGuard® Max is required on curtain to maintain warranty on finish​
  • PowderGuard® Textured powdercoat: Industrial textured powdercoat provides a thicker, more scratch resistant coat for added product protection available on brackets, guides and bottom bar
  • Vision lites on 18 ga. steel slats uniformly spaced of 3" x 5/8" (76 mm x 16 mm) or 10” x 1” (254 mm x 25.4 mm) ​

*Consult factory for specific slat profile and gauge width limits.



Standard Color: PowderGuard® Max

  • white color swatch White
  • gray color swatch Gray
  • tan color swatch Tan

Actual door color may vary from the digital representation shown here. Actual color samples are available by request through your Overhead Door™ Distributor.

Powder Coat Color Options

​PowderGuard® Max powder coat options are available in approximately 200 colors as well as custom matching to specification. On the RapidSlat® PowderGuard® Max is required to maintain warranty on finish. 

PowderGuard® Max​ formula is four times harder than our PowderGuard®​ Premium, providing ehanced strength and durability to the finish and performs well in high cycle applications. Finish also provides easy to clean surface. Available in white, tan, and gray or select a color from approximately 200 RAL powder coat colors.

Powder Guard color options​​​​​​​

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