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Recent content by bradw1128

  1. bradw1128

    Pittsburgh bridge collapse

    Bradley Wilder, P.E. Construction P.E. (KY), MBA Bridge Rehab, Coatings, Structural Repair
  2. bradw1128

    Pittsburgh bridge collapse

    Here is the element level data. https://infobridge.fhwa.dot.gov/Data/BridgeDetail/22435238#!#NBETab All 4 steel columns were at condition state 4 (severe) 2 of 4 movable bearings were at CS3 (poor) I would expect that having a CS4 condition on a primary structural element like that would have...
  3. bradw1128

    Pittsburgh bridge collapse

    The link to inventory data above is outdated. I downloaded the 2021 inventory data below. This represents the 2019 routine inspection and 2020 fracture critical and special inspection. All seemed to be on a September schedule. There likely was a +/- September 2021 inspection after this data was...
  4. bradw1128

    Pittsburgh bridge collapse

    Looks like maybe the city was considering repairs as of 2019: From the 2019 capital budget https://apps.pittsburghpa.gov/redtail/images/4499_2019_Capital_Budget.pdf Page 172: Legislative & Contractual Committments [OMB] Maintenance and Improvements to Forbes Ave Bridge $ 3,000,000.00 $ - 4 I...
  5. bradw1128

    Pittsburgh bridge collapse

    Pic from December 2018 from Twitter @gpk320 Bradley Wilder, P.E. Construction P.E. (KY), MBA Bridge Rehab, Coatings, Structural Repair
  6. bradw1128

    Pittsburgh bridge collapse

    Gathering some data... Story says there was an articulated city bus on the bridge and at least 4 vehicles. There was at least some snow on the bridge. As of the May 2019 street view photo, the bridge was posted at 26 TONS. From Wikipedia, PAAC has New Flyer D60LFR buses, which have a...
  7. bradw1128

    Pittsburgh bridge collapse

    Hard to see on Google, but it looks like a rigid K-frame. Bradley Wilder, P.E. Construction P.E. (KY), MBA Bridge Rehab, Coatings, Structural Repair
  8. bradw1128

    Pittsburgh bridge collapse

    https://bridgereports.com/1456104 Name: FORBES AVENUE over 9 MILE RUN & FERN HOLLOW Structure number: 000000000002410 Old structure number: 027301000030330 (from 1992 edition) Location: 301033 NEAR S BRADDOCK AV Latest Available Inspection: September 2017 Good/Fair/Poor Condition: Poor Status...
  9. bradw1128

    Pittsburgh bridge collapse

    Here is the location: https://www.google.com/maps/@40.4395116,-79.9005108,19z This is not a small, forgotten bridge on a back road somewhere. Bradley Wilder, P.E. Construction P.E. (KY), MBA Bridge Rehab, Coatings, Structural Repair
  10. bradw1128

    Miami Beach, Champlain Towers South apartment building collapse, Part 03

    I would assume an accident. People drive drunk. Elderly drivers get confused and hit the wrong pedal. People get their foot stuck. In the middle of the night in the dark especially, none of those things alone would be surprising. Someone took out the stone planter and fountain at the entrance of...
  11. bradw1128

    Miami Beach, Champlain Towers South apartment building collapse, Part 03

    As far as litigation, who knows? My experience in much, much simpler cases is that everyone who possibly had anything to do with the loss gets sued. Then that gets narrowed down during litigation until they find the few parties most at fault with the biggest pockets. As for 'take away lessons'...
  12. bradw1128

    Miami Beach, Champlain Towers South apartment building collapse, Part 03

    Another thought on the possibility of a vehicle collision with a parking garage column instigating the initial failure: Many (most?) newer car models have a black box (Event Data Recorder) that records - among other things - the speed directly before a crash event. That would be a way once...
  13. bradw1128

    Miami Beach, Champlain Towers South apartment building collapse, Part 02

    Maybe someone who has worked on an urban search and rescue task force could speak to this? From what I can gather, these teams are equipped to be deployed for around 10 days. At some point, the operation ceases to be rescue-focused and becomes recovery-focused. That's got to be a hard call for...
  14. bradw1128

    Miami Beach, Champlain Towers South apartment building collapse, Part 02

    More on the concerns that led to the halt of searching overnight: https://www.miamiherald.com/news/local/community/miami-dade/miami-beach/article252490903.html Miami-Dade Fire Chief Alan Cominsky said engineers raised several concerns with structural issues of the building. Mainly, they...
  15. bradw1128

    Miami Beach, Champlain Towers South apartment building collapse, Part 02

    @TheGreenLama (Disclaimer: I'm not a lawyer, just relaying related experience) 1) I'm in KY not FL, but a few years ago here several HOA's banded together to buy the golf course in their neighborhood after it went bankrupt. They used a special assessment spread over several years. I'm fuzzy on...

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