2 thoughts on “Back Up Lines and Vent Point Ignition

  1. Back up lines should always be stretched when there is a doubt the fire can be extinguished with the first line or the firstline is more than a room or two in deepth inside the structure.

    They should not be charged until a positive water source or a significant amount of tank water is available.

    As to where the back up line should go there is only a couple of hard rules on this. One being if the backup line has advanced past the firstline, you are not the backup. The other being if the backup did not advance the same path as the firstline you are probably opposing.

    Ok so there is three, back up lines should not be on anything other than a straight stream if a adjustible pattern nozzle is in play. Trying to retreat back through a fog pattern rates pretty high on the stuff that sucks meter.

    When you are the back line you have to know who and how manner crews are operating inside the structure that you are to protect. i.e. You have a Engine (attackline