Re: Steel beam
Author: FUD
Date: 05-04-2021 - 11:25

How old is that line? How many major earthquakes has it been through? Steel beams usually don't break like that without being very old and un-cared-for, and being overloaded.

Interesting, too, that the bridge fell out from under the tracks, but the opposite track remained connected. So the control system, if it relies on track circuits, wouldn't see the missing structure and would, in principle, go ahead and route trains over the track with nothing holding it up. That sounds like something PTC would miss, as well, if it occurs in a remote area where it isn't observed and reported.

This will be a good one to get periodic reports on. Something unusual happened to that structure, and we should learn what it is so other structures can be inspected for it.



Subject Written By Date/Time (PST)
  Mexico City Metro bridge collapsed causing train to fall to road below - 70 injured and 13 killed diablo del carril 05-03-2021 - 23:54
  Re: Mexico City Metro bridge collapsed causing train to fall to road below - 70 injured and 13 killed Pict 05-03-2021 - 23:59
  Re: Mexico City Metro bridge collapsed causing train to fall to road below - 70 injured and 13 killed Sy, the Mexican 05-04-2021 - 01:08
  Steel beam Pict 05-04-2021 - 08:46
  Re: Steel beam FUD 05-04-2021 - 11:25
  Re: Steel beam * 05-04-2021 - 11:41
  Re: Steel beam An Observer 05-04-2021 - 12:17
  Daily Mail: Horror footage shows the moment an overhead subway line in Mexico City collapses and kills 24: President vows to punish those responsible WebDigger 05-05-2021 - 00:26
  How is he going to punish Carlos Slimjim and cartel contractors? Fritos Bandito 05-05-2021 - 15:34
  Re: Mexico City Metro bridge collapsed causing train to fall to road below - 70 injured and 13 killed FOLSOM PRISION BLUES 05-06-2021 - 11:59
  Re: Mexico City Metro bridge collapsed causing train to fall to road below - 70 injured and 13 killed Sad Truth 05-06-2021 - 13:07


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