Last spring I created a beta test tool for soffit obstructions to sprinklers. It was fairly basic using the dimensional rules for a soffit against a wall for a standard-spray pendent or upright sprinkler.
Thanks to some feedback and more input on this tool, I'm happy to debut it with new features. I've added code references from the 2007 to 2019 editions of NFPA 13, the different style sprinklers, and an updated visual diagram.
This tool is useful when there's a dropped soffit against a wall to determine whether the sprinkler will throw sufficiently underneath the soffit.
In the coming weeks I'll break out a code path for determining when each of these tools are used. For now, if you're familiar with the NFPA 13 Sections for Obstructions Against Walls then you'll recognize this tool's quick usefulness.
This tool stems from the Figures (b) and (c) for Obstructions Against Walls found in NFPA 13 Section 18.104.22.168.2 for Standard Spray Sprinklers, 22.214.171.124.2 and 126.96.36.199.4 for Extended Coverage Sidewall and Pendent/Uprights, and Sections 188.8.131.52.2 and 184.108.40.206.4 for Residential Sidewalls and Pendent/Uprights.
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Know someone that might be interested in this tool? Send them a link! It's greatly appreciated.
Have a great week!
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Joseph Meyer, PE, owns/operates his own Fire Protection Engineering practice in St. Louis, Missouri. See bio on About page.