High Rise Buildings

Question 1

Supplying High-Rise Standpipe System

Answer 1

• At least 2 Engines
• Supply at least 2 siamese
• If only 1 siamese, supply 1st floor outlet to augment
• ECC’s must coordinate pressures
• Rule of thumb: Separate Engine supply system for each hand line in operation
• Floors 1-10 = 150psi
• Increase by 50psi every ten floors (e.g. 11-20 = 200psi, etc.)

Question 2

High Pressure Pumping

Answer 2

• Greater than 250psi
• Only a Chief officer can order
• Special 3” Hi-Pressure hose must be used
• Fittings are white and noticeably heavier
• Connect lines to outlet opposite pump panel
• Safety zones marked off at 50 foot intervals around working Engines, on each side of the supply line to the siamese
• Supply line to siamese/standpipe secured w/ utility rope to substantial object
• Unused gated inlets/outlets closed & capped
• (2) ECC’s: 1 to pump/1 for radio communications

Question 3

High-Pressure Engine - 3rd Stage

Answer 3

“357” 3rd stage can supply 500gpm at 700psi
(higher pressure than volume)
-Only IC (Chief Officer) can order
-May be necessary for fire above 50th floor or when water supply is unsatisfactory
-ONLY ONE 3” High-Pressure supply line into siamese may be used