Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by RAB678

  1. RAB678

    More wood decks collapse, this time in New Jersey

    Diamonds and rust
  2. RAB678

    Miami Pedestrian Bridge, Part XII

    A Florida court document recently submitted, stated. "Internet activities, social media, forums etc... are acceptable as potential evidence. Any sites pertaining to FIU bridge collapse could be included for reference. Disclosure of facts true, false or subjective in clause introduced in the...
  3. RAB678

    Miami Pedestrian Bridge, Part XII

    "Ja" sorry, a translation. Posted in error for you. I thought meant jovial apologies. In America not same. You say it short for donkey rear? In my country similar lingo is hard to work with. Condolences. Perhaps bridge too far.
  4. RAB678

    Miami Pedestrian Bridge, Part XII

    and this star stuff. get real so fake.
  5. RAB678

    Miami Pedestrian Bridge, Part XII

    To the structural engineers listening> What is the upper bound on the length of this type of span? And the width? Apparently less. If the world comes to an end. Engineers are always worth more than lawyers. ANYONE with ANY mechanical sense is worth more than a lawyer. Sorry should have added...
  6. RAB678

    Miami Pedestrian Bridge, Part XII

    How many ways to skin a cat?
  7. RAB678

    Miami Pedestrian Bridge, Part XII

    Just a thought. Trying to stay close to original design profile. And it probably wouldn't hurt to fan out all connections. Of course to save time and money, you could build it to original specs. But I don't know how well that will work........... Next pic shows redesign using upper pic with...
  8. RAB678

    Miami Pedestrian Bridge, Part XII

    Apologies yes indeed are in order. Sorry, bridge and its discussions sometimes can be aggravating. Please accept my apology. I shall place myself in timeout. Listen but do not speak. "ja" is a term from Thailand. It roughly translates to....fight but fight with good reason.
  9. RAB678

    Miami Pedestrian Bridge, Part XII

    Btw Sym p le your drawing is good and concepts are good. Why not trust yourself? Vance is good also. Personally I find the canopy as the better part of the bridge. The curves, wings and rigidity of it are interesting. By far of the models I made... canopy. Truss connections at deck lacking...
  10. RAB678

    Miami Pedestrian Bridge, Part XII

    Mr Vance I have to disagree with your statement. It must be flawless. Saying that " With 11 compromised, the load path to the support pylon relied more and more on the canopy from 10/11 north to member 12, and on the deck, from node 9/10 north to the pylon." I think you are stating the canopy...
  11. RAB678

    Miami Pedestrian Bridge, Part XII

    The "yoke" concept is related to the same principles as involved in the kitchen. If an egg is cracked and dropped to far the "yoke" splits wide open upon hitting the pan. Hence the egg is ruined. Similar and applicable, in laymen's terms. Sorry. Just had to..................
  12. RAB678

    Miami Pedestrian Bridge, Part XII

    Guess I'm not quite done. I can't seem to find inner truce with the crane vibrating question. The little pixel blow up video was interesting and gave me an idea. I went back and looked at the video dash cam video link that was provided here. https://www.youtube.com/watch?v=Sb4npaRtPfQ I...
  13. RAB678

    Miami Pedestrian Bridge, Part XII

    you said... 416-420 - Member 12 moves significantly down-up-down-up as the surrounding deck area warps dramatically. can you elaborate on significantly? somewhere between 50 thou and a foot? Like an earthquake? end response overview...... I've gotten to where the weakness of 11 12 junction is...
  14. RAB678

    Miami Pedestrian Bridge, Part XII

    I'm going to skip over the rag in the wind theory for the puff of magic dust out the end. and.......let us jump into another fine moment to analyze on this bridge. The latest comments revolve around tension so lets go there. If we examine the absolute center of the deck. 2 things should be...
  15. RAB678

    Miami Pedestrian Bridge, Part XII

    Yes and like I said lets backtrack and analyze these statements........... (my responses will be in parenthesis) You said....... Contrary to popular opinion, I don't think the problem was the concrete truss. (weight had nothing to do with it) It was the design of the concrete truss that was...
See more

Part and Inventory Search

Back
Top