11/22/2017
Design in Chicago
Pendant Sprinkler Head (1)
• Design based on height of ceiling ▫ Not type of building or area required for protection • Example ▫ 14 feet = 0.125 density = Ordinary Hazard • New construction follow 1994 NFPA code book • Retrofits follow the current code book • Chicago water pressure 25 psi ▫ Compared to Addison 78 psi
• Semi Recessed Sprinkler Head • Most cost effective • Used in: ▫ Commercial ▫ Industrial • Typical Response Temperature ▫ 155°F • Typically $7 each
ESFR
Standpipes
• Early Suppression Fast Response (ESFR)
• Built into multi-story buildings • Fire hoses can be connected, allowing manual application of water to the fire. • Similar to having a fire hydrant within a building
• Warehouses with high storage • Typical Response Temperature ▫ 155°F • Typically $20 each
Standpipe Rule of Thumbs
Side Wall Head
• Chicago: every 60 feet a standpipe should be provided • Standpipes require 60 psi at end of hose ▫ Per story you loose 0.433 psi ▫ Hose valves require 250 gallons per minute (gpm) • For first standpipe within the building a 500 gpm fire pump required • For every additional standpipe add 250 gpm to pumping capability ▫ 500 gpm + 250 gpm = 750 gpm • Maximum allowable pump capability is 1250 gpm ▫ After third standpipe need to put in 1250 gpm pump
• Used in:
▫ Commercial ▫ Residential • Used when not enough ceiling space to install heads • Typical Response Temperature ▫ 155°F • Typically $22 each
21
Return to Table of Contents
Made with FlippingBook flipbook maker