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originally posted by: TrueAmerican
Oh but wait. Is that a light pole I see directly in front of that tiny little hole, before the side of the building collapsed. You know, those nasty light poles that all got knocked down by that big ole mean huge jet on the way in. Oh, ok. Yeah.
And why is the roof burnt in a square but not the middle ones. And the nice shiny roof at top looks so out of place
As the operation progressed and headway was being made, it became evident that the fire on the roof was not going to be extinguished or contained without substantial effort. Captain John Snider of the ACFD was assigned to join DCFD Truck 10 in an attempt to get a handle on the situation. The roof's construction was the cause of the problem. The roof appeared to be a typical slate roof over timber slats. However, on making entry into the roof, personnel found that under the timber slats were furring strips of wood, spaced every two feet or so, running from the ridge down toward the face wall. This wooden assembly was erected over a concrete roof deck, which was six inches thick. There was also a sublayer of tar-and-horsehair insulation, which was melting and igniting.
The furring strips created a 6-inch 2 8-inch void space, which was contributing to fire spread and making extinguishment difficult. An inspection hole bored into the concrete showed it to be about six inches thick. Breaching it would be labor-intensive. Since the actual roof of the Pentagon was the concrete sub roof, it was determined that the roof fire posed no real concern for the companies operating below inside the corridors. The fire was threatening to impinge on a cluster of fresh-air intakes for the bunker in which Pentagon command staff were secured many levels belowground. The fire also threatened a cluster of communications antennae crucial to operational effectiveness. These air intakes and antennae were deemed crucial to the ability not only of the Command staff to stay secure in their underground bunker but also for the Pentagon to be able to maintain uplinks with its worldwide intelligence-gathering resources. If the communications were compromised, it would effectively cripple the installation's ability to react to the ongoing threat.
Since neither of these exposures could tolerate impingement, crews made a trench cut to interrupt the fire spread. Crews worked feverishly to contain and control the advancing fire and were successful in delaying it sufficiently on the first day so they could gain some breathing room. All roof operations were suspended at 2000 hours, to safeguard the personnel. Efforts were redoubled the next day; the fire on the roof was eventually declared under control.
originally posted by: Zaphod58
a reply to: NerdGoddess
Plane crashes are the most random event you'll ever hear of. I've heard so many crash descriptions that were crazy to hear. Survivors that came through barely injured, while the people on both sides were killed, parts of the aircraft that should have been totally destroyed surviving, or parts that you'd think should survive being totally destroyed.
There is no telling what you're going to find at a crash site, and no two crash sites are the same.