Air supply means for a controlled environment room

  • US 5,885,154 A
  • Filed: 06/17/1997
  • Issued: 03/23/1999
  • Est. Priority Date: 06/17/1997
  • Status: Expired due to Fees
First Claim
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1. In a controlled environment room encompassing a room space, air supply means which comprise:

  • a room ceiling surmounting said room space,a top closure disposed above said ceiling and spaced apart from the ceiling to form a plenum chamber therewith, andan array of horizontally spaced apart open web steel joists each extending vertically between and adapted to support said ceiling and said closure,said joists each including a bottom pair of spaced apart chords adapted to support said ceiling and a top chord adapted to support said top closure, web sections extending between and having their opposite ends disposed adjacent to said bottom chord pair and said top chord, respectively, and means rigidly connecting said web section ends to the bottom chord pair and the top chord adjacent thereto,said chords of said bottom pair comprising components of said ceiling and defining between them elongate slots extending through the ceiling,said slots providing air passageways extending from said plenum chamber to said room space for conducting pressurized air from the plenum chamber to the room space.

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