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  1. amphora

    Fix for reduced drain capacity

    Thank you for your response. I have calculated the catchment area and used the rational formula to determine the discharge. The peak flow was calculated for a 50 year return period as recommended by state agency. Under normal rainfall conditions I believe the drain will be fine but it’s the...
  2. amphora

    Fix for reduced drain capacity

    I have inherited a construction project where the contractor has installed 6inch electrical ducts through the 3’-0”Wide x 2’-0”Deep box drain, thus reducing the drain’s capacity. The pipes cannot be raised as they also cross an adjacent roadway. As a solution, I am considering adding another box...
  3. amphora

    Retaining Footing - New on top of Existing

    SlideRuleEraYour - Your understanding of the drawing is correct. The wall failed due to overturning. I agree with your recommendation to demolish. Also, I believe the drawing assumes the wall is perfectly vertical which would not be the case given the failure mode. One thing though: You...
  4. amphora

    Retaining Footing - New on top of Existing

    "Thanks" for your feedback SlideRuleEra. This design was not done by me. As stated in the first post to this thread, it is a retrofitting technique that I saw that I am seeking thoughts on. But your opinion has been noted.
  5. amphora

    Retaining Footing - New on top of Existing

    Image of received proposed wall. Hopefully you can understand it
  6. amphora

    Retaining Footing - New on top of Existing

    So I am looking at a retrofitting technique for a failed retaining wall. The new wall will butt the existing and the footing will rest on top of the existing. Is that ok?

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