Oct 14, 2011 · The trench cut (otherwise known as "strip ventilation") is a long narrow ventilation hole that acts as a fire break on the roof of a structure that is being attacked by fire.

Apr 17, 2008 · The trench cut, aka "strip ventilation," is a truck company vertical ventilation tactic that can be utilized to stop the spread of fire across a long, narrow structure, thereby achieving...

• Understand back draft and flashover • Explain how ventilation supports strategic goals • Know how to size-up need for ventilation • Understand different types of vertical ventilation • Define …

Jun 11, 2006 · Once the fire area is determined, decide where to cut. This is usually about six feet in from the front wall or over the fire area. It is better and safer to cut one hole and enlarge it …

Mar 26, 2024 · A trench is a long, narrow excavation typically used for military defense or utility installation, deeper than it is wide, while a ditch is a shallow, narrow channel dug in the earth …

Sep 25, 2011 · The trench type/style cut can be quicker and just as good when cut on a truss roof. You just start at the ridge vent and cut between two trusses 4′ 1″ down and only requires two …

Ditch Cut. The first step performed on a road project is to establish drainage normally through the use of a ditch. To construct a ditch, you must know how to cut a straight ditch line and make …

Nov 1, 2011 · The decision was made to cut on the non-fire side. This also allowed us to complete the cut in reasonable safe conditions. While making the cut we observed fire penetrating …

To construct a ditch, you must know how to cut a straight ditch line and make sure the ditch line stakes fit the plans. The first cut to make is the marking cut. The marking cut is a 3- to 4-inch …

ditch | cut | As verbs the difference between ditch and cut is that ditch is or ditch can be to discard or abandon while cut is to perform an incision on, for example with a knife.