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  1. oldrunner

    Mexican navy tall ship slams into Brooklyn Bridge

    Did the ship lose power and was caught in the current of the river taking it towards the bridge? If this is true, then the only thing they could do was to drop the anchor. How unfortunate. Love old wood boats.
  2. oldrunner

    Thailand/Myanmar Earthquake: VIDEO Dramatic collapse of a high rise in Bankok

    Found much interesting comments and discussions on X. Getting to be my go to source - but still being careful. Center core column structure and flat slab construction. Similar to construction in the 60's that I am familiar with.
  3. oldrunner

    Thailand/Myanmar Earthquake: VIDEO Dramatic collapse of a high rise in Bankok

    Viewed a very long apparently government report yesterday on Youtube. Cannot find it today. Very critical of the situation. Apparently AI composed as I have never seen such a complete report this soon. I searched YouTube and Perplexity for the report; maybe there are better sources some...
  4. oldrunner

    Thailand/Myanmar Earthquake: VIDEO Dramatic collapse of a high rise in Bankok

  5. oldrunner

    Heathrow power outage

    The latest ASCE 113 Substation Design Practice Manual has a chapter on different kinds of protection walls for collateral damage from explosions. Also most current transformers are designed for the cover to explode upward before the side wall panels.
  6. oldrunner

    Heathrow power outage

    Bingo. Old substation (transformer?) and 106.2 percent of capacity! That's a sign for extreme degradation of the coil winding insulation and is discussed (WARNED) in a number of IEEE Transformer publications. There may have been a short circuit that was the final straw.
  7. oldrunner

    Heathrow power outage

    Initial question: How old was the transformer? Did the coil windings have a permanent compression system? A few years ago there was a 30 year old transformer that burned at a Houston substation. Transformers do not run forever and there should be a remove from service plan in place. These...
  8. oldrunner

    NYC Parking Garage Collapse

    In addition: 2022 NYC building code: Basic garage load is 40 psf with a concentrated load of 3000 lbs on a 4.5 x 4.5 inch square area. Ground snow load is 25 psf and the ice load references ASCE 7. Many of the NY codes are web accessible.
  9. oldrunner

    NYC Parking Garage Collapse

    Per page 19 of the New York City 1922 and 1929 building codes: Floor Loads: "120 psf for any other purpose...." Roof loads are 40 psf. Could not find a reference to combined roof load (which can be snow and ice) and the 120 psf floor load.
  10. oldrunner

    NYC Parking Garage Collapse

    I don't understand how the last few responses have missed the previous graphic that showed a 120 psf live load. To me, a 40 psf load is typically for a residence. Also there is a factor of safety built into the design analysis - even in 1927 or 28 - but I'll have to check my dad's old codes for...
  11. oldrunner

    NYC Parking Garage Collapse

    Interesting that there would be "stacked" cars as shown in one of the pictures. Might be ok in the cellar.
  12. oldrunner

    Earthquake

    FaceEngrPE: Your building inspector is your last line of defense! Hiring your own inspector is really a good recommendation. I have suggested that to clients years ago. But good inspectors have called the EOR and saved a lot of grief. In LA an inspector called me about a 6 foot diameter...
  13. oldrunner

    Bridge collaspe in India

    https://www.foxnews.com/world/at-least-60-dead-many-more-injured-after-bridge-collapse-india-report
  14. oldrunner

    Wind Turbine Collapse in New Brunswick (CAN)

    Those cracks are on the sides, not between the pole anchor rods and the tie-down rods. I also wouldn't be happy with those cracks.
  15. oldrunner

    Wind Turbine Collapse in New Brunswick (CAN)

    dik: It looks like you have been on Eng-tips one month longer than me. As far as poles go, the Egyptians just finished a 650 foot flag pole. Now tallest in the world.
  16. oldrunner

    Wind Turbine Collapse in New Brunswick (CAN)

    Thanks, dik. A possible circular ring of cracks might appear before the final failure. I'm good at taking pix's of cracks. It's possible because of a lack of stirrups - say at 4 to 6 inch spacing. Could be wrong. The sketch provided - which may not be from this project shows a stirrup which...
  17. oldrunner

    Wind Turbine Collapse in New Brunswick (CAN)

    To me at this point, it looks like the break is between the pole anchor rods and the out tie-down anchor rods. An up close would be helpful.
  18. oldrunner

    Wind Turbine Collapse in New Brunswick (CAN)

    It's an interesting foundation design. The pole anchorage tension forces have to transfer over to the deep anchor rods - big shear in that section. I don't see any stirrups in the photo. Does that failure photo show a shear failure? Like a diagonal break? I've never liked the the double bolt...
  19. oldrunner

    Flyover collapse in Hubei, China

    Looks like a transformer moving operation with a multi-wheel per axle platform. I had a project where we couldn't put that kind of load over a bridge in no. california. It was basically good for a purple load and the initial legal trailer with the proper axle spacing had to go down the center...
  20. oldrunner

    How many disasters and faillures from bad material choice?

    Welding on stress proof steel. One 200 ton stiff leg failure of mast base - hurt the operator. One curved concrete bridge elevated section for the old 280 highway in SF. C-bracket broke because fabricator substituted a stress proof rod which included some welding for another high strength...

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