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Recent content by miecz

  1. miecz

    Erie Canal

    Can anyone suggest a book about the construction of the Erie Canal? The books I’ve found focus on the politics, economics, social aspects, and religious aspects.
  2. miecz

    effective width for a slab design - wall on balcony

    AASHTO used to have an effective width for cantilever slabs with wheel loads: E=3.75+0.8X, where X is the perpendicular distance from the supporting element to the load. You could treat your wall as a series of concentrated loads and add the effects. You could find out how that formula was...
  3. miecz

    Miami Pedestrian Bridge, Part II

    The dash cam video has a crane obstructing the joint at the top of member 11. But the short “CCTV” video posted by Tomfh on 18 Mar 18 01:39 appears to show the space between members 10 and 11 diminishing before the collapse. This looks like a shear failure at the top of member 11.
  4. miecz

    Hoist Design

    Try to find "Tips for Avoiding Crane Runway Problems" by David Ricker, AISC Engineering Journal, 4th Quarter, 1982.
  5. miecz

    Canopy Drift Loads

    Fascinating shot. Does it show drift on a canopy?
  6. miecz

    Canopy Drift Loads

    When I asked for pictures, I wasn't thinking picture out of a code book. I was thinking - pictures of buildings taken with somebody's smartphone today. It's January. There should be dozens, maybe hundreds of these across the northern hemisphere.
  7. miecz

    Canopy Drift Loads

    It would be helpful for those of us who have not seen 11 foot drifts on little canopies if some engineers could post some pictures of these occurrences.
  8. miecz

    Service III Checks

    Our state Bridge Manual calls for Service III checks under Service Loads. Permit Loads would not need to be checked here.
  9. miecz

    Waterstop location-inside face or outside?

    Agree with BA, unless this is a wet site, I wouldn't use a waterstop. If you must, thread507-254953 also has some good info.
  10. miecz

    ACI supersede IBC - Gravel Footings

    hokie66, I thought the op said the building had precast concrete foundation walls. He never said how thick or how deep these walls were. I still think this is the geotech's call.
  11. miecz

    ACI supersede IBC - Gravel Footings

    Seems to me that the most knowledgeable party in this scenario is the Geotechnical Engineer. As the Engineer of Record, my stance would be that the Geotech must approve the foundation system.
  12. miecz

    AASHTO Bridge Question Regarding Adjacent Box Beams (prestressed concrete) Wheel Distribution Factor

    I haven't posted a picture here in quite a while. I believe it was easiest to upload the file to ENGINEERING.com. at the bottom of the post box.
  13. miecz

    Using ACI 318 in tanks design

    I remember the first SBR tank I designed on my own. I designed for the loads, and followed 350, except for the spacing of wall construction joints. I believe I had them at 60 ft whereas 350 recommended 40 ft. Tank leaked...a lot. Expensive epoxy injection to stop all the leaks. Unhappy...
  14. miecz

    Using ACI 318 in tanks design

    My only experience is with rectangular tanks. If this tank is rectangular, it will leak like a sieve. At worst, it will fail outright. If you don't have the authority to stop this design, then you need to get it to someone who does. Failing that, make sure you are not present the day they...
  15. miecz

    Who "owns" the factor of safety?

    For bridge work,Article 6.5.2.1 of the Manual for Condition Evaluation and LRFR of Highway Bridges reads: Where mechanical properties have been established by testing, the nominal value for strength is typically taken as the mean of the test values minus 1.65 standard deviations to provide a...
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