Correct, to a point, NFPA 13 2002 Chapter 12 - 12.1.2.3 ... to protect ordinary hazard, ... miscellaneous storage, .... But my question was whether or not any, some, or all of the very restrictive obstruction and spacing rules for ESFR must still be applied, when the system is only protecting 6' of class I through IV in metal bin box/solid shelves? Mark at Aero
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Jeff Hewitt Sent: Monday, June 23, 2008 1:53 PM To: [email protected] Subject: Re: ESFR Sprinklers over 8' library shelves Mark, What about maintaining adequate flue spaces, and no solid shelves? It sounds like your bin boxes/shelf units have neither, ragardless of storage height. 150,000 sq.ft. is an fairly large area for something that doesn't really conform to the intent of ESFR protection. Are you maybe thinking this is an ordinary hazard occupancy, and ESFR is allowed over OH occupancies? Jeff Hewitt, PE, SET, SFPE (Professional Member) Corporate Engineer Bi-State Fire Protection Corporation 241 Hughes Lane St. Charles, MO 63301 636-946-0011 636-946-5172 (FAX) This e-mail and any attachments are CONFIDENTIAL and may be protected by one or more legal privileges. It is intended solely for the use of the addressee identified above. If you are not the intended recipient, any use, disclosure, copying or distribution of this e-mail is unauthorized. If you received this e-mail in error, please notify the sender immediately at the above captioned address. ----- Original Message ----- From: "Phelps, Mark" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Monday, June 23, 2008 3:23 PM Subject: RE: ESFR Sprinklers over 8' library shelves Joe, Thanks for the response. To give you a little more detail, the shelf units are approximately 14" deep by 4' wide with 5 shelves high to 6'. The shelving is all sheet metal with solid backs and ends. The shelves are arranged in rows, back to back, and share a common divider, (like double row racks without a longitudinal flue). They have 4' aisles and are open on the top shelf. This storage arrangement occupies an area of about 150,000 square feet in a building that encloses 500,000 square feet. There are 2 X 4 foot light fixtures, AC ductwork up to 26 inches in diameter and banks of conduit up to 3" in diametter and over 2' wide through-out the ceiling space of this building. To clarify your second paragraph, when you refer to "meet the obstruction rules", I assume you mean these obstructions at the roof, as I have just discribed, and not the shelves themselves? Thanks again, Mark at Aero -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Joe Hankins Sent: Friday, June 20, 2008 7:21 PM To: [email protected] Subject: Re: ESFR Sprinklers over 8' library shelves Mark, First and foremost, this is an application that (due to what I presume are solid shelves) takes advantage of none of ESFRs strengths but is subject to all of their weaknesses. Unless these shelves are in a small area of a facility that is otherwise a good fit with ESFRs, ESFRs are the wrong choice. If the ESFR protection is already existing and the shelves meet all definitions of shelf storage, then you are OK as long as you meet the obstruction rules. The bottom line is that, in order for suppression to reliably occur, you have to meet the obstruction rules, regardless of storage height. While lowering the storage height makes a fire easier to suppress, increasing the clearance makes it harder. The solid shelves further exacerbate the challenge. Joe Phelps, Mark wrote: > Mr. Joe Hankins, If you are on line, could you comment on the application > of ESFR (K14 at 75 PSI) installed below a 40' high roof protecting class I > thru IV misc storage on library style shelves (not an actual library). My > specific question is, " do all of the design requirements and obstruction > requirements (conduit banks, lights, ducts, etc.) and exceptions apply > equally as if it were double row racks of I thru IV stored to 30'? > Mark at Aero > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > > _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
