USITT 2017 Tech Expo Guide - 30

Tech EXPO 2017

Figure 2

Figure 3
With careful attention to the bottom and top of the
structure, small and medium stones were troweled
into the face of the concrete. Be careful not to expose the steel mesh. If you do, go back and add more
concrete. When a side is completed, leave it to cure
overnight. Typically, by morning it is dry enough to
roll over and repeat the process on the other side
and then the top.
Due to the organic nature of this project, there
were no CAD drawings made for this unit. This
provided a teaching opportunity for me to share
with my students that a detailed drawing can help,

30

United States Institute for Theatre Technology, Inc.

but that creating a structure from the ground up
is occasionally necessary. To that end, there were a
few additional parameters that required attention
throughout the construction.
First, we needed to accommodate the stick structure that was being constructed by the properties
master. As you can see in Figure 1, we started to lay
out the plywood structures that became the bottom
and each level. And in Figure 2, you can see that we
used the finished twig stack to be sure that the interior diameter accommodated the easy installation of
the firewood.
Second, we needed to put three to six birdies inside the pit with a means to get the cables out without being seen. The structure was hollow to leave
space for sound and lighting equipment. As you can
see in Figure 3, a 1" PVC tube was attached before
the sides were completed. This was to allow for lighting and sound cable. In retrospect, I should have
made that 1½" PVC. In the final installation there
were five circuits of lighting serving 10 birdies and
two sound cables for the two speakers that were also
in the pit.
As we worked through this technique, we found
some tips and tricks that made the evolving product look better. If we had made the steel mesh wavy,
we would have to do that side in segments with
overnight curing in between coats. If you want the
stones to look weather worn or smoother, dip your
trowel into a bucket of water and smooth. You can
also drip water directly onto the surface and smooth
it around with your finger. One challenge that got
better as we progressed through the technique was
how to hide the obvious spot where the top met the
sides. This was accomplished with the water on the
finger technique and smoothing them together. One
word of caution on this: it will feel like rubbing your
finger on sandpaper. It can be done with a trowel,
though it looks better by hand. As you can see in
Figure 4, the top of this segment looks like one stone
and once it dried, the joint between the sections was
imperceptible.
I am well aware that this sounds really heavy and
so, a quick note about the installation. Each half
of the circle only weighed about 150 pounds. Two
people could pick them up and we rolled them into
the space on dollies. The installation only took 45
minutes to complete. That time included loading
them into our shop truck, transporting them to the
theater, putting them on dollies, rolling them inside, and arranging them on stage. The other stones



Table of Contents for the Digital Edition of USITT 2017 Tech Expo Guide

Contents
USITT 2017 Tech Expo Guide - Cover1
USITT 2017 Tech Expo Guide - Cover2
USITT 2017 Tech Expo Guide - Contents
USITT 2017 Tech Expo Guide - 4
USITT 2017 Tech Expo Guide - 5
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https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1966Dec
https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1966Oct
https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1966May
https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1966Feb
https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1965Dec
https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1965Oct
https://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1965May
https://www.nxtbookmedia.com