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  • Users: jedge
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  1. jedge

    pre-cast vs. post-tensioned parking garages

    Thank you to Pinehurst, dik, and dbuzz. The leakage problems identified by Pinehurst was something I had not considered. This project is a design-build project and the contractor has already determined that the precast option costs $500,000.00 less than the post-tensioned option. Thanks Dik...
  2. jedge

    pre-cast vs. post-tensioned parking garages

    I have to generate a letter to a state university system comparing the advantages and disadvantages of post-tensioned cast-in-place parking garages vs. pre-cast parking garages. The purpose of the letter is to facilitate the university in choosing one of the two systems for a new 630 space...
  3. jedge

    LRFD vs. Standard Spec

    I am part of a team working on an elevated roadway for an international airport. We have restrictions on the raodway depth to accompdate floor to floor heights appropriate to boarding aircraft and 13'-6" minimum clearance for the lower roadway. We compared the AASHTO LRFD Specification...
  4. jedge

    Post-tensioned vs. pre-cast parking garages

    I have to generate a letter to a state university system comparing the advantages and disadvantages of post-tensioned cast-in-place parking garages vs. pre-cast parking garages. The purpose of the letter is to facilitate the university in choosing one of the two systems for a new 630 space...
  5. jedge

    How to reinforce long shear walls?

    faisal25 I agree with GraemeL. The relative stiffnes of the shear walls and moment frames should determine how lateral loads are distributed to the individual elements. On a recent 18 story concrete structure in a 140 mph wind zone, I utilized RISA 3D to model the structure and found load...
  6. jedge

    Lateral displacement vs thermal expansion

    I'm reponsible for designing an enclosed and air conditioned bridge connecting two academic buildings at a 45 degree angle to each facade. The walls of the bridge are all glass. The structure is composed of two vierendeel trusses spanning 61 feet between freestanding 32-foot tall concrete...

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