End channels, or horizontal edges, are used to close both ends of the hollow metal doors. The selection of an end channel should take into account the following aspects:

• Door location: Exterior doors must have a sealed flush channel at the top to prevent water infiltration inside the door. The bottom part of exterior doors should have weep holes to prevent condensation inside the door.
  
  
  
• Hardware preparation: Overhead stops/holders, concealed door closers, floor closers, pivots and automatic door bottoms will affect the preparation of end channels.
  
  
  
• Possibility of contraband: Flush end channels are recommended when openings pose a risk of hiding something inside the cavity of end channels.
  
  
  
• Special applications: Sterile room applications require sealed flush channels or continuously welded at both ends of the door to prevent germ infiltration inside the door.

Typically, end channels are manufactured with 16-gauge (0.056"/1.4 mm) material. They are also available in heavier gauges for security or detention areas.

Vinyl end channels should be considered with reserve. If not installed properly, they may rub against the frame header and prevent the door from operating normally. They cannot be installed on fire-rated doors.

de La Fontaine Industries offers the following options: