Unit 3 Assignment 1 Sprinkler

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“We were required to do complete drawings and hydraulic calculations on a single family residence new addition of 104 sq. ft. We are only installing one sprinkler. The AHJ refers to limited area systems of the IFC that this is required. Is this correct?” In response to your question we have reviewed the 2013 editions of NFPA 13, NFPA 13D as the applicable standards and the 2015 edition of the IFC as the applicable code. Our informal interpretation is that limited area systems can be applied one- or two- family dwellings.

Section 903.3.8 for limited area sprinkler systems in the IFC indicates that the systems shall be in accordance with the standards listed in Section 903.3.1. NFPA 13D falls under this section in 903.3.1.3 and would be applicable for this …show more content…
Since this is a partial type of system, the code clarifies how to comply by applying the applicable Sections 903.3.8.1 through 903.3.8.5. Section 903.3.8.3 says that where a limited area sprinkler system is installed in a building without an automatic wet standpipe system, water shall be permitted to be supplied by the plumbing system provided that the plumbing system is capable of simultaneously supplying domestic and sprinkler demands. Section 903.3.8.5 requires hydraulic calculations in accordance with NFPA 13. If a control valve is installed between the water supply and the sprinkler, it should be an approved indicating type that is supervised or secured in the open position per Section 903.3.8.4. When referring to the NFPA 13D standard, there are no references to limited area or partial systems. Historically, NFPA 13D provided guidance for limited area dwelling systems but it is no longer included in the standard. Thus one is forced to refer to limited area systems addressed in Section 4.2 of the NFPA 13 standard. The commentary from the NFPA 13 Handbook indicates that certain codes
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