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  1. MikeManning

    Add Delay to Every 2nd Load of Concrete?

    I'm wondering if anyone has come across this idea before. I'm involved with a project doing a very high strength Mass Concrete pour. We did an insulated mockup to study the heat rise through hydration, and we are pushing the limits of temperatures in the range of DEF. So we are now exploring...
  2. MikeManning

    Depth of Sawcut?

    Hi all, I work for a large General Contractor, and one thing that we see a lot is cracks in slabs outside of the contraction joints. We typically get blamed for these cracks, and while the blame is rightfully ours some of the time, there's a decent portion of these issues where we followed the...
  3. MikeManning

    Concrete Cover at the Drip Edge?

    Another balcony-related question. Something we see all the time is the example attached - a slab designed with minimum cover for the bottom mat of rebar, and then right next to it, a note calling for a 1" recess for a drip edge. Presumably, the area where the drip edge is will not have the...
  4. MikeManning

    Reverse Deflection in Cantilevered Balconies?

    Hello, I work for a large general contractor, and we do a lot of high-rise residential concrete construction. I'm working on a bit of a guide to good balcony design (for waterproofing purposes) in these buildings, and I've got a theory, which might be totally out to lunch (which is why I'm...
  5. MikeManning

    Void Form vs Underslab Suspended Piping

    Hello, I've been looking around for info on this subject but haven't found much. Here is the setup. - We are working on a project, acting as Construction Management with design input. The design is not fully complete. - Our building will have underslab radon collection, and will also have...

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