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  1. timothyd

    alkali–silica reaction - Residential Foundation - Reference thread507-283289

    Thank you!
  2. timothyd

    alkali–silica reaction - Residential Foundation - Reference thread507-283289

    I have come across an identical condition as described in the reference thread507-283289 regarding alkali–silica reaction (ASR) in a residential foundation in Connecticut. Core samples were taken and a petrography test was performed to rule out the presence of pyrrhotite, which has been a...
  3. timothyd

    Composite or not?

    It certainly can be reinforced with steel plate. In fact, that was my recommended repair design to the owner. The concrete retrofit was recommended by another engineer as an alternate and more cost effective approach. I, in turn, was asked to comment on it. My initial reaction was not...
  4. timothyd

    Composite or not?

    Thank you very much for your input. Good point regarding the tendency for the steel to straighten out.
  5. timothyd

    Composite or not?

    It's a review of another engineer's design. His design proposes to ignore the state that the existing steel is in now and simply construct a new concrete beam to carry the entire load, dead+live, without relieving any load and abandoning the existing steel in its overstressed condition. There...
  6. timothyd

    Composite or not?

    Thank you very much for your input. Seems to me that trying to relieve some or all of the load brings the system to some standard, rather than letting the original steel remain in an overstressed condition.
  7. timothyd

    Composite or not?

    For this case, no. Thanks.
  8. timothyd

    Composite or not?

    No concrete flange - just a rectangular section. Thanks for the input.
  9. timothyd

    Composite or not?

    I have a condition where a contractor would like to encase a steel beam in concrete. The problem is that the steel beam is in a loaded, and overstressed condition. He proposes to reinforce the concrete such that it can carry the entire load and essentially abandon the steel in place. My...

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