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  1. Tankie

    Development Length of Welded Plain (Not Deformed) Mesh in Compression?

    Okay, I've searched everywhere though Chapter 12 of ACI 318-11, and cannot locate any guidelines for calculating the development length and lap length for welded plain wire reinforcement in compression. Sections 12.8 and 12.19 address development length and lap length for welded plain wire...
  2. Tankie

    Augercast Piles & IBC 2012 Seismic Detailing Requirements

    Greetings, First of all, a disclaimer: not much experience with deep foundations, I'm more of a design-above-the-foundation type of engineer. But on several recent projects where augercast piles have been used, my colleagues and I have been at odds over the rebar cage length needed to satisfy...
  3. Tankie

    ACI 318 12.5.3(d) For Hooked Rebar For Anchors

    I don't want to derail the recent thread about the Section 12.5.3 modification factors for footing dowels, so pardon the semi-parallel subject. The specific case that has me a bit confused is when a hooked bar (hairpin) is used to provide the needed Appendix D reinforcement for anchors in...
  4. Tankie

    Ammonia in Groundwater: Impact on Concrete?

    Greetings, Have an ongoing project in the Middle East at a petrochem facility, we're installing slurry-displacement concrete piles for an ammonia tank foundation. This new tank is at the exact location of an old ammonia tank that was removed prior to us mobilizing on site. We've found out...
  5. Tankie

    A615 Gr60 Rebar -- Low Temp Applications

    Greetings, A reinforced concrete structure that I'm designing will be subjected to a permanent, sustained temperature of -20F for its entire design life. I plan to use A615 Grade 60 rebar. To the best of my knowledge and research, there are no special precautions that I need to follow for the...

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