Italienaren Enrico från sajten
11 Settembre har publicerat en ny möjlig förklaring till regnet av vad som verkar vara smält metall från 80:e våningen i WTC2 (Södra tornet). Han menar att det kan vara delar från en
UPS-hall som låg precis där:
Citat:
Abstract: research into the causes of a conspicuous flow of glowing material from the corner of the 81st floor of the South Tower leads to the finding of evidence of a highly flammable UPS system at that location and suggests a possible triggering event for the flow and associated fire. Photographic evidence of floor failures is provided. Molten steel is ruled out as an ingredient of the flow.
NIST's förklaring var att det kan ha varit smält metall från flygplanet:
Citat:
Ursprungligen postat av NIST
NIST concluded that the source of the molten material was aluminum alloys from the aircraft, since these are known to melt between 475 degrees Celsius and 640 degrees Celsius (depending on the particular alloy), well below the expected temperatures (about 1,000 degrees Celsius) in the vicinity of the fires. Aluminum is not expected to ignite at normal fire temperatures and there is no visual indication that the material flowing from the tower was burning.
Enrico menar att NIST förväxlat företaget UPS, United Parcel Service, med beteckningen UPS, Uninterruptable Power Supply, en vanlig säkerhetstjänst för anläggningar med tex känsliga serverhallar:
Citat:
In the banking and IT sectors, "UPS" has a very specific meaning: Uninterruptible Power Supply. This is the name given to battery-based systems which must ensure the continuous supply of electric power for computer rooms and electrical medical devices which cannot tolerate the slightest power outage. Isn't it remarkable that the same floor, in the same "two-way" part of the South Tower, exactly where the mysterious flow occurred, was occupied by "UPS United Parcel Service" in 1991 (according to NIST) and by Fuji Bank Limited in 1999 (again according to NIST), and that Fuji Bank carried out reinforcement work "to accommodate new UPS workspace"?
Citat:
It may well be so, but my personal suspicion is that the acronym "UPS" was misinterpreted as referencing the international courier company but actually referred to one of Fuji's IT resources.
Han slutar:
Citat:
Given these facts, it is very likely that the flow was due to light-alloy aluminum but also to the lead of the batteries, combined with other materials originating from the contents of the 81st floor. This combination of materials, after the failure of the floor, poured onto the 80th floor and from there flowed out from the building face. In my opinion, the weight of the batteries and the weakening caused by the fire on the 80th floor (which compromised the structural capacity of the overlying floor trusses) had an important role in the failure of the 81st floor.
Spännande att se någon som faktiskt kommer med något nytt så här långt efteråt.
/S