Theatre Design & Technology - Summer 1980 - 19

w-o'ff-Technical Reports

_ _ _ _ _ _ _ _F_red_M_.

Experiments in Moving
Scenery with L.owFriction Plastics
by Jay Glerum
This article is adapted from a presentation at the 1979 US/IT Convention in Seattle.
Wagons are an old and proven method of moving scenery or actors
on the stage. There are times, however, when the height of 4" or more
that a caste red wagon requires poses a problem. Low-friction plastics
were effectively used in lieu of casters in two professional productions
to solve design problems. The productions, A Christmas Carol, staged
by the Milwaukee Repertory Theatre in 1976, and Working, a 1978
Broadway production, both required the movement of heavy objects
in a wagon-like manner, but dancing, actor movement, and esthetic
considerations precluded the use of traditional caste red wagons. Instead, the stunning visual effects in Working, and the functional scenery changes in A Christmas Carol were made possible using pallets
less than one inch thick moving on surfaces of low-friction plastics. '
The effective and functional solutions offered by low-friction plastics in these productions prompted some first hand experimentation
with the products used: Nylatron in A Christmas Carol, and vulcanized
fibre in Working. The approach taken for the experiments was that of
a practical stage technician, rather than a scientific analyst. The
questions asked were: How large a load can be easily moved onstage
using these materials? How quiet is the movement?
For the experiment, Ys" xl '12" strip Nylatron was chosen. Nylatron,
produced by the Polymer Corporation, is gray-black in color, and contains finely divided particles of molybdenum disulphide solid lubricant. 2 It comes in a wide variety of thicknesses and widths, and is
available through plastic jobbers. The thickness chosen for the experiment allowed the strip to be screwed to the floor with flathead wood
screws, but was thin enough so that an actor would not trip. Nylatron
may be cut and drilled with ordinary shop tools. The cost was 36a: per
linear foot.
The second low-friction plastic used in the experiment was bone
grade, vulcanized fibre. It is produced by many companies which can
be located by looking in the Yellow Pages under "Fibre."31t is an extremely hard, dense material and very abrasion resistant. For the experiment V." thick material was chosen because thinner material,
while able to withstand the wear, is too susceptible to curling from
moisture to be useful---it is very susceptible to humidity changes, and
expands and contracts almost like hemp rope. The cost was $40.00
for a 4' x 4' sheet.
The pallet for all experiments was a used 4' x 4' piece of particle
board with two hanger irons bolted on opposite sides for attaching the
pulling ropes. Both twenty-pound counterweights and people were
used for weight on the pallet. Using people helped determine if the
movement was smooth enough so that an actor would not be jerked or
fall while the pallet was moving. In all experiments the weight mentioned is exclusive of the pallet.
A test area 20' long by 4' wide was laid out on the stage. The vulcanized fibre was ripped into 1 y," wide strips on a table saw. Holes

were drilled and countersunk for 3/." x 7 flathead wood screws, and
three tracks were applied to the stage floor. The outside tracks were
placed 2" from the outer edge, the other track on center. Strips of "h"
pine were nailed to the floor to act as guides for the pallet so that it
would not move from side to side.
The budget provided for purchasing samples of the two plastics,
but was not sufficient to include an electric winch 4 Hand winches
from stock were tried, but proved to be too slow. Hemp rope was at-

Jay Glerum is Technical Director at Marquette University and Vice-Commissioner of the Technical Information Commission of
USITT.

USITI /Summer, 1980

Theatre Design & Technology

17



Table of Contents for the Digital Edition of Theatre Design & Technology - Summer 1980

Contents
Theatre Design & Technology - Summer 1980 - 1
Theatre Design & Technology - Summer 1980 - 2
Theatre Design & Technology - Summer 1980 - 3
Theatre Design & Technology - Summer 1980 - Contents
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https://www.nxtbookmedia.com