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Recent content by dfitz

  1. dfitz

    12" SD located under building column footing

    My recent inspection revealed a 12" SD (HDPE pipe) running directly under an endwall column footing. The footings, wall/pier have already been poured and the contractor was getting ready to backfill. The endwall footing is 6x6x12" thick, and was upsized for uplift conditions on the PEMB...
  2. dfitz

    Tension Tie Beam Steel

    Thanks for the feedback. Is there criteria for what the strain should be limited to for this type of application? XR250, is there criteria for what is acceptable? I calculated the same 1" for 2#9 bars, and 2" for the single Dywidag (although using a minimum of 2 bars seems more appropriate)...
  3. dfitz

    Tension Tie Beam Steel

    Hello, I'm designing a foundation for a pre-engineered metal building, 90' clearspan. The mainframes exert approximately 50k of thrust due to Snow, Dead and Collateral. I intend to tie the piers together with a typical tension tie with rebar and mechanical couplers (2#9 bars). I've been asked...
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