Berkeley CSUA MOTD:Entry 24245
Berkeley CSUA MOTD
2017/10/17 [General] UID:1000 Activity:popular

2002/3/27-28 [Science/Electric] UID:24245 Activity:low
3/37    where i work, there is some major renovation of labspace going
        on that involves drilling thru concrete floors.  aparently much of
        the electrical wiring is in ducts in the concrete, and all the plans
        were lost years ago, so they have to "drill blind".  last time they
        did this they hit a electrical line and it seriously sucked.  they
        claim there is no better way to do this than to just drill and hope.
        does anyone know if this is really true?  it seems like modern
        technology should provide a way to find ducts in concrete(the floors
        are just a few feet thick.) right now they(the contractors) are
        just telling us to unplug our computers for a week while they drill.
        \_ If the wires are powered on, you might be able to detect the
           residual-electromagnetic field. Another possibility is to use
           sonar or some such device to get a measurment of the floor
           thickness. The problem is that all of this is expensive. Its
           much cheaper to keep your computers unplugged.
           \_ It's cheaper to lose a week of productivity?
              \_ Do you know how much a sonar box costs to rent?
2017/10/17 [General] UID:1000 Activity:popular

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