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GreggFavre's profile
Gregg Favre
Gregg Favre
Gregg Favre
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Gregg FavreVerified account

@GreggFavre

Public servant. Biased to action. Comfortable in chaos. Occasionally found at the edges of Empire. NavalPostGrad & GWMed Alum. Harvard Fellow. Stoic.

huSTLe City  ⚜️
Joined September 2011

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    Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

    After my last tweet, I got a couple DMs asking firefighting related questions about the #NotreDameFire. I -like most of you- are watching from a world away. But if you’re interested in some profession specific things I’d note/be concerned of, you can follow this thread.pic.twitter.com/golMnbYsDK

    10:50 AM - 15 Apr 2019
    • 13,281 Retweets
    • 23,125 Likes
    • Prince Հայաստանի ազգային գրադարան Greemap_Paulownia Stacy Arizola Gerald Posner Maximilian Marx Troels Petersen Mayte Carsen hima
    628 replies 13,281 retweets 23,125 likes
      1. New conversation
      2. Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

        The first issue is how old churches are built - heavy timber construction with large open spaces and very few (if any in a church like #NotreDame) fire stops. A firestop is a passive fire protection system made up of various components and used to seal openings in buildings.pic.twitter.com/C5pOMPUa5r

        14 replies 323 retweets 2,198 likes
        Show this thread
      3. Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

        If the fire started high on the structure, there is a chance that Paris Fire can save the walls and unimpinged areas of the Cathedral. But the roof has basically been surrendered at this point. The peak, the lack of access and fire spread means almost certain loss.

        10 replies 224 retweets 1,948 likes
        Show this thread
      4. Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

        In firefighting there is something called a "trenchcut" that basically opens a large roof up from peak to gutter, allowing space to stop fire spread. Given the peak of the #cathedral roof and advanced fire conditions, this is an unlikely option in the main area of the building.pic.twitter.com/Rvo96lL1A7

        6 replies 187 retweets 1,591 likes
        Show this thread
      5. Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

        Even if arial waterways (think hook and ladders with prepiped hoses) could reach the roofline, it is difficult to see how they would get an angle that would get water on the fire - its just too high. So this means you have to put firefighters inside...pic.twitter.com/YhyNZRYzBH

        14 replies 166 retweets 1,479 likes
        Show this thread
      6. Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

        Inside is a whole other problem. The primary option is large 2.5" fire hoses. These are heavy, difficult to maneuver and against a fire like this, largely ineffective.pic.twitter.com/5tt3yDUpSo

        7 replies 154 retweets 1,456 likes
        Show this thread
      7. Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

        This option also means placing responders on the inside as the roof is falling down around them. And we aren't talking shingles. This is heavy timber construction. Often 12"x12" in old churches, perhaps bigger in a #Cathedral this old.pic.twitter.com/RwO3N1Qrjw

        14 replies 211 retweets 1,707 likes
        Show this thread
      8. Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

        Another concern is accountability. Life safety is always the first priority, even in historic landmarks. #NotreDame was undergoing a renovation. This means that there were more people there than normal. Is the #Cathedral staff all out? The construction workers? Visitors?

        12 replies 194 retweets 2,169 likes
        Show this thread
      9. Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

        If unaccounted for, where were they and how many? What does a rescue task force look like? How many responders do you place in additional harms way for unconfirmed reports? I don't have these answers at a distance, but the responders on scene are asking them and forming plans.

        3 replies 114 retweets 1,554 likes
        Show this thread
      10. Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

        And lets pause to remember how fires actually burn. You need oxygen, fuel, heat and a chemical chain reaction. If you take any one of these away (cool material, remove fuel or oxygen, or interrupt the CCR) the fire will go out.pic.twitter.com/fgakKat1Mp

        5 replies 180 retweets 1,614 likes
        Show this thread
      11. Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

        Removing the fuel is a no go. Churches have no shortage of things to burn. The heat that a fire this size is putting off is tremendous. Little options for interrupting that. The chemical chain reaction is off to the races. That horse left the stable in the first five minutes.

        8 replies 146 retweets 1,580 likes
        Show this thread
      12. Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

        That leaves the oxygen. Unfortunately, even if the roof had not burnt off, churches are nearly impossible to control ventilation in. Their design is to be open and airy. Great for Sunday worship, terrible for managing fire spread.pic.twitter.com/08KbCViTTX

        16 replies 260 retweets 2,015 likes
        Show this thread
      13. Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

        Finally, I'd be worried about construction materials not usually found in churches (since it was under renovation). Things that can explode, things that don't like being hit with water, Hazardous materials that can run off / go airborne, etc.

        11 replies 139 retweets 1,574 likes
        Show this thread
      14. Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

        Finally - especially this deep in to the fire - you have to be thinking about collapse of some or all of the structure. The steeple and roof have to GO somewhere and its no guarantee that its straight down.pic.twitter.com/AWRFcQmYiT

        9 replies 239 retweets 1,862 likes
        Show this thread
      15. Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

        The walls of #NotreDame are stout, but if weakened by fire and roofing timbers could come down. Are the streets in the collapse zone cleared? Of both onlookers and responder/trucks? Any other buildings threatened? If a wall of fire comes down what the plan to fight THAT fire?pic.twitter.com/1kgepGctXW

        20 replies 177 retweets 1,607 likes
        Show this thread
      16. Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

        My gut (and experience) tells me that best case scenario her is something similar to Orthodox Cathedral of St. Sava Fire in NYC. At least for the main part of #NotreDame that has been affected by fire.pic.twitter.com/k0m7r2Aobp

        17 replies 473 retweets 2,052 likes
        Show this thread
      17. Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

        Should be noted that while St. Sava is huge in its own right, it is dwarfed buy #NotreDame. Depending on how hoses are placed, current wind conditions, responder access and water supply, damage could be significantly more, or less (- helpful I know...)

        9 replies 106 retweets 1,425 likes
        Show this thread
      18. Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

        One thing that #NotreDame has in its favor - @PompiersParis are world class firefighters. I saw their work when I served on a board for the @IAFC & they have as strong, dedicated and skilled responders as you'd find anywhere in the world. And my thoughts are w/ them all today.pic.twitter.com/N4rXdU4tTp

        46 replies 1,507 retweets 7,663 likes
        Show this thread
      19. Gregg Favre‏Verified account @GreggFavre 15 Apr 2019

        Finally, as a firefighter, as a Catholic and as a human this fire is heartbreaking. #NotreDame is a beacon of both faith and the human spirit. I wish all on scene a safe evening and comfort in knowing their best effort was applied. Thanks for following along.pic.twitter.com/FLk35QdQcJ

        272 replies 1,178 retweets 11,381 likes
        Show this thread
      20. End of conversation

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