there are a couple of problems in trying to answer this post. The most important is that a CMSA sprinkler has no assigned density. I assume you meant CMDA based on the sprinkler model.
The next is what track did you follow to get to where you are since Figure 11.2.3.1.1 is the wrong chapter. I assume you attempted to go to chapter 13 for miscellaneous and low-piled storage where Exposed unexpanded plastics in a rack up to 10 ft is an EH 2 but that is only for miscellaneous storage. Low piled storage is limited to 5 ft. As such, you must go to chap 17. IN chap 17 you could run into an excessive clearance restriction but the ceiling height was not stated. Having said all that back to the issue of allowed area. Storage is limited by NFPA 13 to a maximum of 40,000 sf per system. As pointed out earlier, FM limits are greater. Good luck, Roland Roland Huggins, PE - VP Engineering American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives Dallas, TX http://www.firesprinkler.org <http://www.firesprinkler.org/> > On Nov 11, 2015, at 11:14 AM, CAD Station <[email protected]> wrote: > > AFSA Forums: > > > > I want to clear up a question that has been bothering me since looking at > plans for an addition to an existing warehouse. The project is a plastic > manufacturing and warehousing facility of non-combustible steel bar joist > construction. The storage height is limited to 8' max. The design layout is > CMSA VK580, 16.8K sprinklers spaced at 100 sq. ft . The design density is > .45 / 2500 sq. ft. > > > > My question is this; according to figure 11.2.3.1.1 this is a Ex Haz Grp II > density and by my interpretation, the overhead system should be limited to > 40,000 sq. ft. total area. However, the existing system that was done by > another contractor covers 50,000 sq ft. Have I been looking at this wrong > all these years since 231-C was incorporated into NFPA-13? Is storage of PVC > plastic commodities to 8' an Ord Haz Grp II occupancy? > > > > Thanks, > > > > John Paulsen > > Crown Fire System Design, LLC > > 6282 Seeds Road > > Grove City, OH 43123 > > P - 614-782-2438 > > F - 614-782-2374 > > C - 614-348-8206 > > Email - <mailto:[email protected]> [email protected] > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
