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Mark J. Cotter's Blog – March 2018 Archive (3)

Water Rules - Summaries of the recent UL studies Part 1 - Water Mapping

The nozzle is the fire service’s iconic and essential tool, like the rifle to the soldier, the hammer to the carpenter, or the knife to the chef. While we have many other tools, and vital roles that don’t even involve water, when on the fireground most of them support or depend upon use of this appliance. Forcible entry clears its way, and ventilation clears its results. The protection of life and property relies on its expert use, and salvage protects the building and contents from the…


Added by Mark J. Cotter on March 28, 2018 at 6:49am — No Comments

Vertical Ventilation Video - What do your eyes tell you?

The following video clip was sent to me by a reader who was responding to my last post regarding vertical ventilation:

In it, you will see two firefighters vigorously cutting a roof as fire burns below. The provider of this link pointed out the immediate improvement in interior conditions as evidenced by the lift in the smoke layer that occurred as the fire vented. Taking a contrary position, I would point out…


Added by Mark J. Cotter on March 12, 2018 at 5:53am — 12 Comments

Cutting Roofs - Our beloved, dangerous waste of effort

I generated a bit of discussion a few years ago when I posted a blog expressing my viewpoint that vertical ventilation, except in the presence of pre-made openings (rooftop scuttles or bulkhead doors) was a tactic that had little utility on the modern fireground ( This was based on our then-new knowledge…


Added by Mark J. Cotter on March 5, 2018 at 8:00am — 4 Comments

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