TB 151 - Progressive Hose Lay and the Smokey Pack Lightweight Hose System Flashcards
There are two methods for deploying hose,
Simple and Progressive.
relies on a continuous line being advanced around the fire from the Engine to the nozzle with no junctions in between.
The Simple Hose Lay
The Simple Hose Lay has the advantage of minimal friction loss due to
minimal fittings
Simple hose lays uses what length of double jacketed hose
1” or 1 1/2”
is a hose lay that starts from the supply source and progresses along the perimeter of the fire.
Progressive Hose Lay
Progressive hose lay uses a continuous application of water while extending the lay and allows for a series of lateral junctions at ______ intervals
100’ intervals
Progressive hose lay
uses a continuous application of water while extending the lay and allows for a series of lateral junctions at
Trunk line
Progressive hose lay.
The trunk line will be a minimum size of
1 1/2”
Progressive Hose lay:
Each junction will have a 1” line with a 1” (_____ _______ _______) nozzle attached and be connected to a 1½” ______ _____ through a __” to _” reducer, referred to as a lateral.
10/40 dual gallon age nozzle
Gated wye
1 1/2 to 1”
The Progressive Hose Lay has several advantages over the Simple Hose Lay. First, it provides for a _______ ______ on a fire without being forced to shut down the hose to progress up the flanks.
Continuous attack
The Progressive Hose Lay has several advantages over the Simple Hose Lay.
Also, it is safer for the _______ ________ ____method as it provides a larger safety margin, having charged 1” lateral lines left in place for the event of a flare up along the line.
Direct attack method
Only the_______ attack line is advanced charged, increasing deployment speed and decreasing work load
1””
The disadvantage of the Progressive Hose Lay is the higher friction loss due to the increased number of fittings (approximately______– ____psi each).
5to 15
It is the Policy of the LAFD that when using a Progressive Hose Lay to provide for perimeter control, companies shall utilize a minimum of __” hose line for the trunk line and a __” hose line for the attack and laterals lines.
1 1/2”
1”
Each drop of a Progressive Hose Lay shall consist of the following:
_____’ 1½” Single Jacket Hose (Minimum size for the trunk line)
•________ Single Jacket Hose (Attack and lateral line)
•______Gated Wye with
____ 1½” to 1” Reducer
•1” Nozzle (10/40 Dual Gallonage)
•____ Rubber Bands or ladder straps to secure gates.
100’
1”
1 1/2
One
2