Model 109G

High Speed Grille Style Roll-Up Door


Marathon's 109G, high speed coiling grille door is ideal for parking garages, fleet garages, dock areas or any application requiring quick access, security and ventilation. And with no roller wheels, links, bars, tension systems or other high wear parts to replace, the 109G requires less maintenance than a standard roll-up grille style door.

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  • Two speed roll-up door - up to a 42”/sec. opening.
  • Two doors in one, high speed for quick access and high strength for security.
  • PLC control panel.
  • Electric reversing edge.
  • Send and receive reversing photoeyes.
  • Alternate drive systems available.
  • No metal-to-metal contact between side guides and slats.
  • No roller wheels, belts, cables or links.
  • No springs or complex tension systems inside columns.
  • Fenestrated slats provide security while preventing fume buildup.
  • Operator can be mounted in a variety of configurations to accomodate tight headroom and clearances

Panel Construction

  • Fenestrated annodized aluminum slats.
  • Slats have nylon windlocks and wind guides, eliminating metal-to-metal contact between slats and high density PVC lined side guides.
  • Curved panel profile enables door to roll into a compact drum.


  • PLC control panel.
  • 2 speed operation
  • open- up to 42”/sec.
  • close-21”/sec.
  • Other operations available, consult factory.

Performance Features

  • Reversing edge for instant stop/reverse.
  • Manual chain override.
  • (2) send and receive reversing photoeyes.


Activation Devices:

  • Pull cord.
  • Single push button.
  • Photoeye.
  • Radio control.
  • Loop detector. 
  • Motion detector.
  • Pre-announce to close kit
    (light/alarm/or combo).
  • Adjustable time delay close with auto close feature.
  • Front mounted operator, or custom operator location available. 
  • Window slats in 4 slat increments.
  • (Custom window configurations available.)
  • Operator and barrel shrouds.
  • Custom colors.


  • One year limited warranty on all components.
Fenestrated Anodized Aluminum Slats

Fenestrated Anodized Aluminum Slats

  • Provide security while maintaining air flow.
No Links, Bars, Roller Wheels, Belts, Cables or Tension Springs

No Links, Bars, Roller Wheels, Belts, Cables or Tension Springs

  • No high wear parts to replace.
Optional Pre-Announce to Close Kit

Optional Pre-Announce to Close Kit

  • Available with light, alarm or combo.
Nylon Side Guide Strips

Nylon Side Guide Strips

  • Eliminate metal-to-metal contact between side guides and slats.
Ideal for Parking Garages

Ideal for Parking Garages

  • High speed operation for quick entrances, exits and increased tenant satisfaction.
Ideal for Fleet Garages

Ideal for Fleet Garages

  • Keeps equipment secure while maintaining air flow and preventing fume build up.
Dual Photoeyes Built into Tracks

Dual Photoeyes Built into Tracks

  • Immediate Door Reversal if Beam is Broken.