From: "Sprague, Harold O." <SpragueHO(--nospam--at)bv.com>
Date: Thu, 29 Jun 2000 11:23:23 -0500
For a few pipes and ducts, you drop a plumb bob, mark the floor, measure the
height above the floor with a steel tape, and measure the distance from the
column grids. (low tech)
For a lot of pipes and ducts, I would bring a surveyor in using Total
Station (high tech). They can lay out a very complicated pipe and duct
system in 3D in an afternoon. The Total Station initial set up costs a lot
so the cost per hour is relatively high, but once the data is collected it
can be overlaid on a CAD drawing in a very short amount of time. Your total
time is much less than the low tech solution.
Call your local surveyors, ask them if they have Total Station capabilities.
> -----Original Message-----
> From: Ken Peoples [SMTP:lvtakp(--nospam--at)yahoo.com]
> Sent: Thursday, June 29, 2000 8:20 AM
> To: seaint(--nospam--at)seaint.org
> Subject: taping plumb-bob?
> We have a need to measure (field locate) a lot of
> piping and ducts that are hung from the roof of an
> industrial building. I don't need to be terribly
> accurate - just to within an inch or so. In
> considering how to do this, I thought that it would be
> nice to be able to drop a plumb-bob (no matter now I
> write that I don't think the spelling is correct) down
> from a lift and be able to measure the vertical
> distance to the floor (actually from the plumb bob
> string?) without having to use a flimsy tape. Has
> anyone seen something like I am describing? I guess
> it could be digital. I could use a cloth tape and
> attach a plumb-bob to it somehow but that doesn't
> appeal to me as much as having something that is
> actually made for the situation. Any ideas? (using a
> survey instrument is not really feasible where this is
> located because of a lot of fork truck traffic)
> Thanks for your thoughts,
> Ken Peoples, P.E.
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