Chapter 4 Hoseline selection, stretching, and placement Flashcards
What directly affects putting water on the fire?
Selecting proper hose size and length of hose
Quickly and efficiently stretching the line
Making sure that it is stretched to the proper position
What are the flow rates available for interior lines?
12-325gpm
In the US how many fire deaths happen in residential buildings
75%
What is the practical maximum flow of 1 3/4 handline?
180gpm
What determines the diameter of line use?
Occupancy, area of building, and size of fire
What determines the length of hoseline to use?
Buidings height, area, and setback
What is the rule on maximum length of 1 3/4 preconnected hose length
6 sections or 300 feet
What is the estimated hose per flight of stairs?
one section
How many floors can a 50 foot length of hose reach going straight up between a stair well?
5 floors
When is it acceptable to stretch a handline off the end of an elevated platform?
final stages of fire during overhaul
What are the priorities of the interior handline?
protect human life, confine the fire, extinguish the fire
In a situation where the first hoseline cannot expect to knock the fire down where should the first line be placed?
Placed to cut off the fire not chase it
In a multilevel building, except for the need to place hoseline for a specific life threat, where should the lines be placed?
To protect the interior staircases
What is accomplished by placing the initial hoseline at the staircase in multilevel building?
hosestream between the fire and any trapped occupant
confine the fire by cutting off access to most likely extension path
protect the most common means of travel
What are the two types of exposures
The most severe exposure
The exposure most severely threatened
