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)
