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  • Users: ZTGR
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  1. ZTGR

    Seismic Retrofit

    Hi, Thank you in advance for your opinions and recommendations. We need to perform a structural retrofit analysis for a 6 story building built in the 60s. We have as built/construction plans that shows the foundation system to be 24-inch diameter piers drilled to 35 and 40 feet. We need to...
  2. ZTGR

    Expansion Index

    Hello All, is there any criteria for testing for expansion using a 2.5 inches california ring? is there a paper related to that?? or any kind of relationship? any tip would be appreciated Thanks.
  3. ZTGR

    Remolded shear

    Hello, I have a simple question about the remolded shear testing, all the materials are not meeting the specs required (C of 590, Phi of 28 degrees) the materials are silty sands most of the time. i am performing the remolded shear on the material passing sieve #4, the ASTM don't mention...
  4. ZTGR

    Foundation on concrete slurry

    Hello all, an over-excavation been done for a footing designed for 10 kips/ft2. the footing suppose to be at 3 feet above the existing over-excavated bottom. a footing for such a high pressure should be on native rock, the bottom of the over-ex is native claystone. the contractor is planning to...
  5. ZTGR

    Determining depth of existing caisson

    Hello all, I need some help on where i can find a method or guide on how to determin the depth of an existing caisson without having to drill, sonic test or some alternatives?? any info is appreciated.
  6. ZTGR

    Rock Correction Factor

    Hello Geotechnical Engineers, I am looking for help to determin rock correction factors for mass grading. please could you help me on where i can find information about that. Thank you

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