If you read the definition of expanded and exposed you could say that a foam mattress with the cloth coverings MAY be considered as being Exposed. (definition of exposed in 3.9.1.10, 2007) since the cloth covering could absorb water...
BUT the addition of the plastic bagging of the items takes it a different direction as it would create a barrier that could retard water absorption, now you're encapsulated. Probably end up with control mode sprinklers with in-racks (yeah that will get them excited). But remember we've got Solid Piled plastics (mattresses) and Racked plastic commodities (sofas) so there are two different chapters in NFPA 13 to deal with. Time to go talk to Mr. Engineer........... There's a bit of analysis needed here and some criteria needs to be defined and verified. In the IFC, "Furniture, wood or metal with plastic covering or padding" is considered as Class IV commodity. Probably where the engineer got his info from. Craig L. Prahl, CET Fire Protection Group Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [EMAIL PROTECTED] http://www.ch2m.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Scott A. Futrell Sent: Thursday, August 07, 2008 3:57 PM To: [email protected] Subject: RE: Mattress storage ESFR may not be appropriate if these are foam mattresses that should be classified as exposed and expanded Group A Plastic... Scott (763) 425-1001 Office (612) 759-5556 Cell -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Thursday, August 07, 2008 2:50 PM To: [email protected] Subject: RE: Mattress stroage I hope he specified more than just ESFR. Did he give you any specifics or has he left the selection of pressure and K-factor up to you? Depending on the water data and what is chosen you may or may not need a pump. Hopefully he gave you recent water information so you don't have to guess. ESFR would eliminate in-racks by definition but the depth of the racks and arrangement of the commodities may create some major shielding issues. Craig L. Prahl, CET Fire Protection Group Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [EMAIL PROTECTED] http://www.ch2m.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Andy Johnston Sent: Thursday, August 07, 2008 3:25 PM To: [email protected] Subject: RE: Mattress stroage Thank you for the confirmation before I go to the engineer with hat in hand and try and explain why I can't do what he asked. I this case it means a pump. Andy Johnston Master Craft Plumbing Contractors Inc. Phone (386)252-7047 Fax (386)898-0322 Your are welcome to call my Cell (386)547-4970 The information contained in this transmission is privileged and confidential. No reader may make any use of it's contents with out the written approval of the sender. The recipient should not act or use the information in this transmission or any of its attachments without separate authentication of its authenticity or approval. If you have received this in error I apologize please notify me so I can correct my records. Thank you for your cooperation. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Thursday, August 07, 2008 2:55 PM To: [email protected] Subject: RE: Mattress stroage Interesting since NFPA 13 A.5.6.3 (2007) lists foam mattresses (in finished form) as a Group A Plastic. Box springs which are mostly wood and metal as Class III. I would consider the foam in the sofas and probably lean toward classifying them the same as the mattresses. They probably looked at Furniture, with plastic coverings - Class IV. But with foam plastic cushioning it's back to Group A plastics (sofas). Somebody messed up. Need to remind them of Sofa World. This stuff burns fast and hot and flows. You need to look at the racks again too. Craig L. Prahl, CET Fire Protection Group Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [EMAIL PROTECTED] http://www.ch2m.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Andy Johnston Sent: Thursday, August 07, 2008 2:29 PM To: [email protected] Subject: Mattress stroage I am working on a bid for a warehouse. I was given a floor plan for the new building and a copy of the fire plan from the same building they just finished in another state. The also sent photos of the existing building. The pics show mattress in plastic bags staked on end all lined up in a row. Just like in dramatic burn video I recently watched. The other area of the warehouse has couches bagged the same way. Sitting on 12'3" bay racks. The sprinkler plans for the this are list it as Class IV commodity protected with EFSR heads and no in rack system. Even if they put the stuff back in the boxes I can't see how they a class V commodity Is there some thing I am missing before I call the engineer? Thank you for your attention. Andy Johnston Andy Johnston Master Craft Plumbing Contractors Inc. Phone (386)252-7047 Fax (386)898-0322 Your are welcome to call my Cell (386)547-4970 The information contained in this transmission is privileged and confidential. No reader may make any use of it's contents with out the written approval of the sender. The recipient should not act or use the information in this transmission or any of its attachments without separate authentication of its authenticity or approval. If you have received this in error I apologize please notify me so I can correct my records. 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