Date: Fri, 15 Oct 1999 09:50:10 -0500

Author: trappe@physics.utexas.edu (Karl Trappe)

Subject: Re: science bldg-conduit

Post:

You will have to pull teeth to get the conduit, especially if it is large
diameter run. If you stay in the 2 inch size (which means you have to run
lots of them, the plastic is cheap enough. When you get to long runs of 4
inch plastic conduit, you're going to find the contractor trying to exclude
it due to costs. If its left out, the contractors have to core drill the
slab, and that is very expensive.

Uou will also have another problem: The conduit carries noise from one
area to the other. We bring our ethernet lines from our prep area to the
classroom via the 4 inch conduit. Prep area noise is channeled right under
the instructor's notes. A solution which our maintenance personnnel figured
out was to stuff each end (obvious), but they used a clever choice. There
exists some bulb-like blow up plugs used to block sewer lines. These fit
easily into the line with the wires there, and can be inflated to fill the
space. That has worked as a reasonable solution to the noise conductance
and allows for de-inflation to add additional wiring, and re-inflation to
plug back up (and there's no resizing!)

John Mocko wrote:
3) Think very carefully about your multimedia needs in teaching spaces for
both now and the future and run LOTS of conduit. Even if the conduit
remains empty you'll probably find a use for it in the near future. Be
sure the conduit has pull-strings. Anywhere you expect to put a multimedia
projector be sure the conduit is at least 2-3" in size...the larger the
better. Get a multimedia company involved VERY early in the design stage.
The installation will be much easier to do if you get help during design
and construction rather than after the building is completed and you end
up retrofitting the room.

Dr. Karl I. Trappe Desk Phone: (512) 471-4152
Physics Dept, Mail Stop C-1600 Demo Office: (512) 471-5411
The University of Texas at Austin Home Phone: (512) 264-1616
Austin, Texas 78712-1081

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