16 seems excessive for Return Air, It might be for supply, to keep ambient noise down, by using very low velocity from the "Plenum above the ceiling, but if this is an existing classroom, the chance is more likely that these "Egg Crate" panels were what they had on hand, when the solid panels got wet or were broken at some point. If you can find the original HVAC drawings they should tell you what was original design. (An 800 SF classroom would normally only have about 4 panels for return air.)
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of GAYLE KNOWLES Sent: Wednesday, June 01, 2011 2:27 PM To: sprinklerforum Subject: RE: openings in ceiling grid the room is a high school music room with 90 2X4 ceiling panels and only 16 of them are eggcrate panels. The 16 eggcrate 2X4 panels have a 40% opening per panel. We have pendants protecting the room but Fire Marshall thinks we need uprights. Gayle Knowles, SET _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
