I agree with Todd. I too was taught to carry the calcs back to the effective point of the test.In well looped and gridded systems this may not amount to much additional friction loss, but when I was working as an AHJ, that is what I expected to find when reviewing the calcs. In recent years, almost every submittal I've seen fails to indicate where and often how the test was taken.
In reality, I have also seen a system tied into a well gridded main between the flow and static hydrants and fail to produce sufficient flow of of the main drain the even meet the light hazard design of the system. The problem...70 year old pipe that was tapped...corrosion had reduce the 6-inch cast iron done to less than 2 1/2 inches. The test hydrants were connected to the north-south laterals of the grid; They, and the rest of the grid to the south were 50 years newer. _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
