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  1. Cutterhead

    Miami Pedestrian Bridge, Part VII

    JRS87.... That would be a west side view. That is the bottom side #11 tendon conduit, which I believe would be a short conduit section. I believe the tendon broke somewhere near there. When the canopy hit #11 at the top 2/3, it the snapped tendon, & ejected past Mr Brown. The conduit section...
  2. Cutterhead

    Miami Pedestrian Bridge, Part VI

    My take... 1 Deck was poured. 2 Truss was poured. 3 Canopy was poured. 4 Blisters were poured. At his point, all concrete, & steel is at equilibrium, with no forces to cause cracks. 5 Once concrete was aged, post tensioning was started while still in supported mode. 6 Then shoring was removed...
  3. Cutterhead

    Miami Pedestrian Bridge, Part VI

    Here's a 40k a day traffic, 70mph double span bridge, that I traversed 4 times a week for 6 years while being built, while 50 year old one was being torn down. I was very impressed with how it all was coordinated on such a busy I-71 interstate highway. The new one is basically a concrete arch...
  4. Cutterhead

    Miami Pedestrian Bridge, Part VI

    chris snyder "Was there an article about this, or is a logical deduction? (the closest I read was ~"work was ordered by Pate to deal with something discussed at that morning's meeting" I can't remember exactly where I heard it, but this comes close. The issue at hand was cracks, & tightening...
  5. Cutterhead

    Miami Pedestrian Bridge, Part VI

    #4, #5, #6 are all at base of #11. The diagram shows them at the bottom of deck, but it isn't so. One thing that I take from picts, is that some cracks were surfaced over, & some cracks were after surfacing. In other words, there was a lot of movement from #11 to deck. It was stated by Pate...
  6. Cutterhead

    Miami Pedestrian Bridge, Part VI

    Pictures post shoring removal, pre move #4, #5, #6 tells me the story. The cracking evidence is that the bottom of #11 slid across the deck, while the lower (4" tall?) side was being held back by a stirrup. Then they prestressed #11 to 560kips, & transported. The next step would place the...
  7. Cutterhead

    Miami Pedestrian Bridge, Part VI

    As far as whether or not the "puff" is a bridge corner, it is not. The reason I say this is that early in the video, you can see the bridge corner to the left of the vertical man lift mast. This is at a point in truck travel, that you can compare the left, & right bridge corners. As the truck...
  8. Cutterhead

    Miami Pedestrian Bridge, Part VI

    TheGreenLama "Correct me if I'm wrong, but after reviewing photos and videos here, it appears that both faces of member 11 are completely wrapped in that banner, "City of Sweetwater, FIU, Florida International University." This banner would obscure any shear cracks that would've developed in...
  9. Cutterhead

    Miami Pedestrian Bridge, Part VI

    jrs87 (Mechanical)30 Apr 18 13:12 "Interesting videos showing span fully suspended from deck ends on temporary shorings before move. Interesting mainly because span may have had an opportunity to collapse at this stage." I thought about about this a while back. When the truss columns were...
  10. Cutterhead

    Miami Pedestrian Bridge, Part V

    Hi, 1st timer here, so I'll cut to the chase... The short fillet block between #11, & #12, = 10" tall x 24" = 240sq inch cross sectional area. #11 diagonal = 21 x 24 = 504 sq inch cross sectional area. #11 is in the range of 4,000psi The fillet potentially = 8,000 psi load. The fillet was...

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