American Fire Sprinkler Association [http://www.firesprinkler.org/] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
AFSA Technical Update ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A newsletter dealing with codes and other technical issues April 3, 2013 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Storage Classification Using Plastic Pallets "I have aluminum wheels stored in plastic pallets stacked 4 high to 16 ft in a noncombustible metal building with a maximum roof height of 32 ft-4 in. Is this classified as an exposed unexpanded Group A plastic?" In response to your question we have reviewed NFPA 13, 2013 edition as the applicable standard. Our informal interpretation is that classification of the commodity unit shall be increased by one class for unreinforced plastic pallets or two classes if reinforced plastic pallets are used. If the aluminum wheels are stored on plastic pallets, section 5.6.2 addresses the impact by pallet types. The classification of the commodity unit shall be increased one class when unreinforced polypropylene or unreinforced high-density polyethylene plastic pallets are used. These plastic pallets shall be marked with a permanent symbol to indicate that the pallet is unreinforced. Section 5.6.2.3 addresses Class I through Class IV commodities on reinforced polypropylene or reinforced high-density polyethylene plastic pallets. The classification of the commodity unit shall be increased two classes except for Class IV commodity, which shall be increased to a cartoned unexpanded Group A plastic commodity. The annex gives examples that a Class II will become Class IV, and Class III and Class IV will become a cartoned unexpanded Group A plastic commodity. Pallets shall be assumed as reinforced if no permanent marking or manufacturer's certification of non-reinforcement is provided per Section 5.6.2.3.1. Aluminum wheels (rims) in this application would be a Class I commodity. Thus the commodity class would increase by one or two classes depending on the type of plastic pallet with a final commodity classification of Class II or Class III. If the aluminum wheels (rims) were placed in five-sided unexpanded plastic bins, this would be classified as an exposed unexpanded Group A plastic. Despite the fact that the definition of a Class IV commodity includes some plastics within the load (up to 15% by weight and 25% by volume per section 5.6.3.4.1(3)), the location of the plastic and/or the material covering the exterior of the load will change the classification. As discussed in A.5.6.1.1, if a Group A plastic is enclosed in a five- or six-sided metal container, it is considered a Class II since the metal exterior significantly reduces how quickly the fire spreads and the amount of plastic involved. Conversely, a noncombustible commodity such as ceramic (a Class I when in single larger cartons) when heavily wrapped in tissue paper then placed in a corrugated box should be considered a Class III. Also look at the examples of commodity classifications in Table A.5.6.3. For example, when up to 5 gal plastic bottles are filled with a noncombustible liquid they are a Class I but when in a solid plastic crate they are a Group A plastic. There is one last variable discussed in note c of this Table. The classification is affected by openings in the wall of the crate. As the opening become larger, it acts more like a Class III. Unfortunately, the size of opening is not quantified. This doesn't really impact the decision on wheels since it is related to containers of noncombustible liquids. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ firesprinkler.org [http://r20.rs6.net/tn.jsp?e=00100ITEYAT9FLhUenn6XsPZxUatKBWiIkBSn6Z6TQ64L8B3LYskj9v8bU08khcEEv_CaozZ96XHF9vrcLj59fc75oYT5RIhDHGenfHYDrGec9CdkQQ-y8R6w==] Hosted by the American Fire Sprinkler Association ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Technical Update is prepared by the Technical Services Dept. of the AFSA: Vice President of Engineering and Technical Services Roland Huggins, a PE registered in fire protection engineering; Phill Brown, a NICET IV certified automatic sprinkler technician and NFPA Certified Fire Protection Specialist (CFPS) and Tom Wellen, a PE registered in fire protection engineering. This is provided with the understanding that the AFSA assumes no liability for this opinion or actions taken on it and they are not to be considered the official position of the NFPA or its technical committees. Copyright 2012, American Fire Sprinkler Association. All Rights Reserved ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ PDF Version PDF Link [http://r20.rs6.net/tn.jsp?e=00100ITEYAT9FIdwyG2rHAeEa9CQ6sXuVNFf12ID9GLI1RIrchGj0fJbJASK7paUvm5bYDJZGt-aMKueTRpPYrg6AEnEc526cDKmdc1dasrbckOIJuKeynTqmo5qGLHyqrVQfzABLoFwPkTA7lMuN_i4mSNogbVwioqW5sj4b9AlA08IZDCsVbFHZLc2_9knVdRG-zojWjiKyQ=] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Training Webinar Bob Caputo to Present an AFSA Webinar on "Technical Changes from the 2010 ed. to the 2013 ed. of NFPA 13 Part 2 - Installation Requirements" Wed., April 17, 2013 Free to AFSA members! Register Button [http://r20.rs6.net/tn.jsp?e=00100ITEYAT9FLQNJuTzqtAsJeEO289vmhudT3bfbYsyoPUM1aSI1XWvVkbGEMpDW2iJUYEVNcWUMycHGrPg4UOBC9B8GOfeLuxI9uSlH5_77lgCzhSkUcKwP-TKkNcj4F7HhUFcAXAsyFjGHcfcMezc3Z91HZcmhYw] For details and/or to register, visit the AFSA Calendar [http://r20.rs6.net/tn.jsp?e=00100ITEYAT9FKMniZd_exa0blfYz348iYbdJ9UBoem_S36BJPacdn13Kggzv57qgP18u9s_aoM58RZq7zQjxikZ188LcMjJicHAovcLTvVKNYW_MFnDc0t9hrDiYP9yN-x_znbgD81bzp2qqe9YzhK6ImOk95yYO1z3W1kz3t5broqDoqxa2gNf1APv5DhDFTnygkcITfs-Zdk9DgaCCQgUW9auYsfBbW_t3l7vGxHYvF9CMRC_I80ikZ9qyjyT6fCxFLoA881gFSOuJxajJM3bjNreq0fFB1G]. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Training Calendar AFSA Beginning Fire Sprinkler System Planning School May 13 - May 24, 2013 Check our calendar to view upcoming training. 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