Richmond Fire California 7-9-8-coffin cut ventilation hole

Academy instructors Manly Molton and Marc Lucero demonstrate the 7-9-8 coffin cut. It is of one methods we teach our FF's for venting a commercial flat roof with conventional construction. Using this cut allows the vent team to expand the hole quickly with only two additional cuts. Note after making the head cut and knockout cut, the right leg cut (vertical cut) is left twice as long as the head cut. This allows the hole to be expanded after the nine cut (bottom cut) is completed and the hole has been opened and cleared. Once this is done all that is needed is to lengthen the left leg cut and and additonal bottom cut ( the 8 cut ). for those that are unfamilar with the name it comes from the three steps it take to make this hole. Starting with the #7 the #9 expanding it to the # 8. The cut originated in the NYFD.

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[firetulle]

Nice eye protection... gotta love the big city boys

[MarcLucero]

I am wearing safety googles for all you safety nazis! lol you'll see me adjust them in the end of the vid... I learned good habits in a small town called chico... thanks for being concerned... stay safe!

[FirefighterTHVFD]

What's the point of cutting the triangle in the corner?

[MarcLucero]

Helps the hookman by giving him a place to grab the section and louver it.

[afj622]

must stall that blade whenever it is lifted out of a cut. especially with a smoked roof. good video guys

[mrclean1352]

beautiful.

[bbev13]

@MarcLucero wait wouldnt the triangle in the corner be for the inspection cut to make sure youre cutting in the right spot and not spreading the fire in the wrong direction

[sunshinefire]

I am a firefighter too, and this is clean work. I don't know why there are any dislikes. Good job guys and I hope I see some of you at a stairclimb on Sunday.

[1cameronfire]

The triangular cut is also used as an inspection hole.

[cowdog39]

I know you took heat for the music in the orginal post [ crystall method ] but I like it better great job guys great vid

[huffmanfdtx]

Great technique brothers, also called the "7,9,8" to explain what the cuts look like as you progress. Is the "trash hook" the only hook available off the truck? I have seen it in several different videos during roof operations. I am a fan of the "NY Roof Hook" or "Halligan Hook" for most roof operations. Stay safe and spread the knowledge.

[bmb319]

great video, but a few things- I'd use the other end of the hook just in case their are wires underneath so it wont get hooked, second I'd have the hookman right behind the vent man holding onto his pack so he doesn't fall in if soething gives way, third I'd clear those rocks so you don't get a face full of shit when you start cutting.

[RIVERSHIT07]

sounds like creed lol

[Rwpfire72]

@afr185sc50

[Rwpfire72]

@MarcLucero ---Not Crystal Mthod...Creed, and the song is called ONE....