The continuous obstruction requirement to apply the beam rule kicks in only when the top of the obstructions is level with or above the plane of the sprinkler deflector (section 8.6.5.2.1.2). If extended coverage then even if the top of the obstruction is below the plane of the deflector, the beam rule applies.
Roland Roland Huggins, PE - VP Engineering American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives Dallas, TX http://www.firesprinkler.org On May 19, 2014, at 2:32 PM, IPA <[email protected]> wrote: > Too much tunnel vision right now: > > Which obstruction criteria would one use for ductwork 16" below the roof > deck with 6" clear space between the duct and the roof and the sprinkler > deflector at 4" below deck in a light hazard office? > _______________________________________________ > 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
