Theatre Design & Technology - Spring 1993 - 39

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Left: The
4,700-lb. door
glides smoothly
open and shut
to provide
ready access to
the "Proscen-

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stage.
Right: Sound
door leading to
vestifule and
"Flexible
Theatre" can
be power operated or moved
manually.

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borrom and rhe sill. Acrivarors ar borh
conrrol srarions seal and unseal rhe
pneumarically-operared sill gaskering.
A posirive, sound-righr seal is provided ar rhe sides and rop wirh a mulripoinr
cam roller and adjusrable vinyl gaskers.
As rwo rubular sreel columns rorare ar
each side, a cam roller sealing mechanism drives againsr rhe door fronr and
moves ir roward rhe wall. This acrion
compresses rhe gaskering berween door
edges and frame ro creare a high performance seal.
The smaller acousrical door ro rhe
flexible rhearer is 11'-10" wide and 10'3" high. When opened, ir recesses
behind rhe adjacenr cosrume room. This

door is SLIspended from a crolley and is
chain-driven by a one-half horsepower
moror. Ir rravels smoorhly on a rounded
sreel crack marched ro rhe conrour of rhe
roller. This crack is mounred on a sreel
angle frame fasrened ra a 6" x 3" x 3/8"
recrangular sreel rube header.
Borcom seal ing is by rwo neoprene
seals, compressed by rhe "down-and-in"
closing acrion of rhe door co creare a
sound-righr seal. Two spring-loaded
wedge larch poinrs secure rhe door ro rhe
frame ar rhe head, and sray rollers secure
ir ar rhe borrom. As rhe door closes, rwo
spring assisrs compress rhe adjusrable gaskering ar rhe rap and sides of rhe door.
The slighresr discrepancy in insralla-

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rion could have adversely affecred rhe
sound seal. The insralling concraccor
exercised grear care ra be sure rhe enrire
header assembly, sill, channel, and casings of borh doors were insralled plumb,
crue, and square.
\X1irh rhe inclusion of rhe Jamison
acousrical doors co separare rhe scene
shop from rhe performance spaces, rhe
Cornell Universiry Cenrer for Thearre
Arcs effecrively combines convenience
and quier ro meer rhe needs of a wideranging rhearre, film, and dance program.
ffi
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Servillg the Elltertaillmellt Illdustry
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(518) 793-6706
TD&T

1993 SPRING

37
Table of Contents for the Digital Edition of Theatre Design & Technology - Spring 1993
