1、 Tentative Interim Amendment NFPA 13 Standard for the Installation of Sprinkler Systems 2016 Edition Reference: 17.2.3.5.6, A.17.2.3.5 and A.17.3.3.5 TIA 16-1 (SC 15-8-14 / TIA Log #1165) Note: Text of the TIA was issued and approved for incorporation into the document prior to printing. 1. Revise s
2、ection 17.2.3.5.6 to read as follows: 17.2.3.5.6 The minimum operating pressure shall be either 30 psi (2.0 bar) or 60 psi (4.1 bar) based upon the applicable storage and ceiling height for the installation as follows: a) 30 psi (2.0 bar) for storage heights up to 25 ft (7.6 m) with a maximum ceilin
3、g height of 30 ft (9.1 m) b) 60 psi (4.1 bar) for storage heights up to 25 ft. (7.6 m) with a maximum ceiling height of 40 ft (12.2 m). 2. Revise section A.17.2.3.5 to read as follows: A.17.2.3.5 The Fire Protection Research Foundation conducted a series of full-scale fire tests at Underwriters Labo
4、ratories to develop protection criteria for the rack storage of exposed expanded Group A plastic commodities. The tests are documented in the report, “Protection of Rack Stored Exposed Expanded Group A Plastics with ESFR Sprinklers and Vertical Barriers.” The criteria for exposed expanded plastics a
5、re based on Tests 2, 3, 7 and 8 of the series, which investigated a 40 ft (12.2 m) ceiling with a range of storage heights. The tests used K-25.2 intermediate-temperature ESFR sprinklers with vertical barriers attached to the rack uprights at nominal 16 ft (4.9 m) apart. Vertical barriers of sheet m
6、etal and 38 -in. plywood were both investigated. In Tests 1 through 6, transverse flue spaces between commodities were blocked. Comparing the results of Test 6 with blocked transverse flue spaces and Test 7 with no blocking of transverse flue spaces, the number of operated sprinklers decreased from
7、11 to 7 and improved suppression of the fire. The criteria for exposed expanded plastics are based on Tests 9 and 10 of the series, which investigated a 30 ft (9.1 m) ceiling with a range of storage heights. The tests used K-25.2 intermediate-temperature ESFR sprinklers with vertical barriers attach
8、ed to the rack uprights at 16 ft (4.9 m) (nominal) apart. Vertical barriers of 3 8 -in. plywood was investigated. The area limitation between the vertical barriers and aisles indicated in 17.3.3.5.9.2 will limit the depth of a multiple-row rack arrangement. The hose stream allowance and water supply
9、 duration requirements considered the burning characteristics of the exposed expanded plastic commodity that generates a high rate of heat release very quickly, but the commodity involved in the combustion process is then quickly consumed after fire suppression or control is achieved. 3. Revise sect
10、ion A.17.3.3.5 to read as follows: A.17.3.3.5 The Fire Protection Research Foundation conducted a series of full-scale fire tests at Underwriters Laboratories to develop protection criteria for the rack storage of exposed expanded Group A plastic commodities. The tests are documented in the report,
11、Protection of Rack Stored Exposed Expanded Group A Plastics with ESFR Sprinklers and Vertical Barriers.” The criteria for exposed expanded plastics are based on Tests 2, 3,7 and 8 of the series, which investigated a 40 ft (12.2 m) ceiling with a range of storage heights. The tests used K-25.2 inter
12、mediate-temperature ESFR sprinklers with vertical barriers attached to the rack uprights at nominal 16 ft (4.9 m) apart. Vertical barriers of sheet metal and 3 8 -in. plywood were both investigated. In Tests 1 through 6, transverse flue spaces between commodities were blocked. Comparing the results
13、of Test 6 with blocked transverse flue spaces and Test 7 with no blocking of transverse flue spaces, the number of operated sprinklers decreased from 11 to 7 and improved suppression of the fire. The area limitation between the vertical barriers and aisles indicated in 17.3.3.5.9.2 will limit the de
14、pth of a multiple-row rack arrangement. The hose stream allowance and water supply duration requirements considered the burning characteristics of the exposed expanded plastic commodity that generates a high rate of heat release very quickly, but the commodity involved in the combustion process is then quickly consumed after fire suppression or control is achieved. Issue Date: August 18, 2015 Effective Date: September 7, 2015 (Note: For further information on NFPA Codes and Standards, please see www.nfpa.org/codelist) Copyright 2015 All Rights Reserved NATIONAL FIRE PROTECTION ASSOCIATION
