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? |
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