Ch 6 pg 143-147 classes of standpipes

Designed for building occupants to control small fires until the fire department arrives.

Limited to 1/2-inch hose with a maximum flow of 100 gpm.

Fire departments shouldn't use building hoses for large fires, as they are often unmaintained and unsuitable.

A standpipe system providing heavy hose streams for firefighters, and occupant access to hoses.

Addresses the limitations of a Class II system with larger hose nozzles.

A fire protection system that provides high-volume water flow, crucial for apartment fires with closed sprinkler valves.

Allows firefighters to use heavy hoses and residents to use first-aid hoses before the fire department arrives.

Separate valves that provide water supply for either a big hose or a personal/first-aid hose.

2.5-inch to 1.5-inch reducer placement for water control, but not for high-rise stairwells; NFPA guideline for occupant safety.

NFPA recommends placing resident-use hoses outside stairwells, on the fire floor, to avoid smoke inhalation, and blockage during evacuation.

Systems that allow building occupants to use hoses to fight fires.

Fire departments must evaluate the risk of opening a stairway door before entering, considering occupant safety.

Untrained occupants may not respond appropriately to a fire, potentially blocking access or fleeing danger.

2½-in. outlets connected to 1½-in. hoses need pressure reduction to prevent injury to untrained occupants.

A device that restricts pressure to a safe level (e.g., 80 psi for 1½-in. hoses).

NFPA 14 sets pressure limits for 2½-in. outlets after 1993, with a minimum pressure of 100 psi, permitting up to 175 psi.

Fire departments need minimum pressures (100 psi) to combat fires effectively.

Occupant-use hoses often save lives, but the presence of trained personnel is crucial for success.

A device with a hole drilled through it, used to restrict water flow and reduce pressure on the downstream side while maintaining static pressure.

A device with two sets of overlapping holes on a movable plate that can be adjusted to control water flow and restrict pressure. Even fully open, it still limits flow.

An orifice plate reduces the pressure on the downstream side of a hoseline by creating friction loss, but it does not limit the static pressure.

The vane-type PRV regulates water flow by controlling the alignment of its overlapping holes, effectively reducing pressure and limiting flow.

Before connecting to a standpipe, check for obstructions near the threads. This is because a restrictor might be present.

A firefighter manually controlling the outlet valve is responsible for maintaining fire department control of the outlet pressure, coordinating with the nozzle team.

The pump operator is effectively located at the fire floor through radio communication with the nozzle team and the member controlling the outlet valve.