Highrise Hydraulics Video

This video is to show how our highrise hydraulics were determined and to use the guage on the standpipe

[@MrLhill1222]

I am a fire sprinkler contractor that test these systems, this is great insight on why we test these systems.

[@willlock3644]

Great video!! I wanted to add something about the FDC pressures. High rise buildings are required to have signage showing the pressure required to hit 100 psi at the top.

[@thiagoduarte7916]

Congratulation for your explanation! How many psi are necessary to firefight a flashover Room in a comercial building ?

[@chriswilson965]

Just found the video. Looking at 2" with 2.5" couplings for our hirise paks. Do yall plan for putting a second line in play on the fire floor? Just didnt see that option in your hookup.

[@Rescue-mt7fl]

Chris, consider both 2” and 2.5”. You truly gather a larger fire flow from the 2.5, especially with 1.75 tip or 1 1/4 tip. Always consider the potential failure of the fire pump. In pumping to a high rise with appliance loss, you may very likely not have the flow from the hookup in question for two lines. Gated wyes are pressure robbers and when flowing high GPM or pressures, wyes are very dangerous. All pressures are transferred from one line to the next as lines are opened and closed. Consider instead the larger line is controlling your hallway or in open offices, giving you the reach through the cubicles from defensible positions. Consider the fire loads for your jurisdiction in determining size of high rise lines. You should also always be planning to pump to the highest floor in the building. As fire doors are opened through escape and fire attack, you must consider fire spread to the floors above. Use of the inline gauge and figuring fire flow per floor with use of a person to monitor that is spot on. Many departments use the 3rd or 4th person on the line who is responsible for monitoring fire flow and feeding lines.

[@billsmith5109]

@@Rescue-mt7fl Some of the British fire brigades have changed to 30mm solid tips, using 65mm hose. A little math shows this is almost exactly a 1-3/16” tip, with 65mm close to 2-1/2” hose. Yes, Akron makes a 1-3/16” tip. At your NP = 45psi the 1-3/16 tip flows 280 gpm. I think they sized up to 30mm especially for open office floor plans. Remember sprinklers are much less common in the U.K., and they want to be ready in event system doesn’t operate. I don’t think their FP bureaus have historically been right on top of periodic ITM enforcement. Is yours? One indicator of that question is, do you have an inventory by building of all active FPS in your jurisdiction? If you don’t, you probably don’t have an effective ITM enforcement system unless you’re tiny.