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To provide a screen type door which shall be installed in conjunction with an existing overhead or side sliding or rolling steel type door. The screen door shall use either the existing door’s vertical track, or a separate dual track that shall mount behind the existing door.

The operation shall allow either the standard door or the screen door to be lowered. The screen door shall provide free area for ventilation, while restricting access for insects, birds, animals, or other unauthorized entry.

A track switch shall be installed in the existing track to provide automatic switching between the existing and screen door. A separate dual track with appropriate brush seal may be used as an alternative to the track switch to allow independent door operation, as with a dual track and rolling door application. In all applications, the screen door shall use outside pull brackets at the bottom of the door, unless used as a stand alone or side sliding door.

The screen door’s frame shall be 1 1/2″ or 1 7/8″ thick, all aluminum construction with extruded aluminum rails. The mounting hardware shall be standard commercial grade 2″ or 3″ ten ball rollers, track, and galvanized steel 11 gauge hinges. The deep reverse angle used for rolling steel doors shall be of 14 gauge galvanized steel construction.

The springs shall have a minimum 15,000 cycle life.

Screen:

The screening shall be 304 stainless steel in either of the following configurations:

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