Model 621

RapidSlat® Model 621

This advanced service door is 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 20′ (6096 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


Interlocking roll-formed slats, end locks attached to prevent lateral movement. Flat Profile type F-265 for doors up to 20′ wide; 22 gauge galvanized steel

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


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

  • Flat profile type F-265 for doors up to 20’ wide also 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
  • Wear strips are on available option, please note however that the 20 PSF wind load rating is no longer available when wear strips are selected
  • 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 motors available in 1 HP, 2 HP, 3 HP, and 220 VAC 1-phase and 208/230/460/575 VAC 3-phase
  • 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) ​


Standard Color: PowderGuard® Max

  • White

  • Gray

  • 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.


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