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Recent content by umrce

  1. umrce

    Skewed Slab Span Bridge

    Thanks to the both of you. The state I work in doesn't have any limitations to my knowledge, which is why I'm trying to make a judgement call. I may reach out to them to see how they feel about it, but I appreciate the input.
  2. umrce

    Skewed Slab Span Bridge

    AASHTO very explicitly outlines the criteria when the transverse deck reinforcement can be skewed up to a certain angle. My understanding since this is in Chapter 9, is that it only applies to decks on beams. So my question is what's everyone's opinion on skewing transverse reinforcement slab...
  3. umrce

    Continuous Reinforcement Requirements

    Thanks Rod
  4. umrce

    Continuous Reinforcement Requirements

    This is an incredibly tedious question so bear with me. I'm trying to terminate some negative moment reinforcement and AASHTO Section 5.10.8.1.2c states that At least one third of the total tension reinforcement provided for negative moment at a support shall have an embedment length beyond the...
  5. umrce

    Sounding Bridge Deck for Repairs

    I sounded a bridge deck a few years ago (we dragged it with chain to look for delamination's) and while visually it appeared to be in good condition it sounded terrible. I probably had 80% of the surface indicating repairs. We later found our from the transportation agency that owned/maintained...
  6. umrce

    Bonding Strength of Concrete in Tension

    I'm evaluating a demo for a contractor and we're investigating whether or not they could lift a non-composite slab off a precast beam in sections. One concern I have is that the flanges of the PCB are fairly thin so I was going to check for an uplift condition as they "pop-off" the slab. My...
  7. umrce

    Desperately Need a Sketching Program!

    I do structural engineering and we regularly use a program called Tedds (by Tekla) that lets you perform calculations in Microsoft Word. My biggest complaint is that it doesn't have the ability to do digital sketches to support the calculations and drawing in Word is exhausting. If I really...
  8. umrce

    Bend Rebar for a Large Radius?

    I primarily design bridges where I often run into a very large radius on a curved bridge deck. I've never specified pre-bending the deck reinforcing that runs longitudinally along the length of the bridge. I've always assuming that since these bars are typically no larger than a #6, that they...
  9. umrce

    Soldier Piles & Lagging using SPW911 and LRFD

    Unfortunately PEinc answer is probably the best you're going to hear. SPW911 is not capable of LRFD design. The best you might be able to do is develop a semi-handcalc aapproach and see if you could copy the analysis output from SPW911 in an excel format, factor the loads and do your design...
  10. umrce

    Cover Plate Thickness

    Yes. We have no choice but to provide a cover plate due to that very issue.
  11. umrce

    Interpretation of LRFD Bridge Design Spec

    I'm looking for other's opinion on how to interpret Section 5.7.4.2 regarding the use of a reduced effective area for design in Seismic Zone 1. The code requires the percentage of steel in the reduced effective area to be the greater of either 1% or the value obtained from the following...
  12. umrce

    Cover Plate Thickness

    Yes the 1.34 value is incorrect. Typo on my part.
  13. umrce

    Cover Plate Thickness

    I recently had a fabricator request increasing a cover plate thickness, here are the parameters of the situation. Flange thickness = 1.34" Cover Plate thickness = 1.5" Requested CP Thickness by contractor = 1.75" Normally I wouldn't hesitate to approve the request but AASHTO LRFD limits the...
  14. umrce

    And there was much rejoicing

    Praise the lord and pass the taters!! If it does, I'm to the point that I'd gladly pay it! I work in a state where we typically work under the most current version at the time a contract with the DOT is executed so we're constantly juggling which project is under which code. To make matters...
  15. umrce

    Waler Detail for Tieback Anchored Sheet Pile Wall

    We're designing a sheetpile wall that is tall enough that it will require a waler with angle tiebacks. Would anyone like to provide there opinions on, and maybe an example of how to detail the waler and tieback. The last project we did the waler was a double channels welded horizontally to the...
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