Specialty Fabrics Review August 2021 - 14

[ BRIEFS ] swatches
Tensile roof retrofit
C
ustom membrane provider Birdair Inc. has brought a modern look to
a shopping mall in Lancaster, Pa., with the installation of a retrofitted
Tensothermâ„¢
translucent insulated tensioned membrane system.
The three-layer Tensotherm roof replaced a single-layer tensile membrane
roof Birdair installed at the Park City Center mall in 1988.
Tensotherm's three layers include an outer polytetrafluoroethylene
(PTFE)-coated fiberglass membrane, one layer of 8mm Nanogel®
aerogel
blanket and an interior PTFE acoustical liner.
Birdair's work on the 25,000-square-foot retrofit included design,
engineering, fabrication and installation of the full replacement. With the
help of Black Hawk helicopters, large fabric bundles were lifted from the
adjacent parking lot and precisely placed on four different strategically built
platforms for final installation of the new roof. This process was necessary
because of the location of the center court. The Birdair team worked with
JP2 Architects to complete the retrofit, and because the mall was open
during the installation, crews worked during the night.
When the mall was constructed in the early 1970s, its center court was
enclosed with a solid roof structure. In 1988, the original roof was removed
and replaced with a single-layer PVC tensile fabric membrane roof in a single
conical configuration designed and built by Birdair. The roof is mounted from
a central steel tri-cord mast about 100 feet in height, with supporting radial
cables attached from the top of the mast down to the perimeter beam. Eight
to 10 feet above the primary mall roof, steel beams framed the perimeter of
the low tensile roof in an octagon 160 feet across. The top of the center mast
features an aluminum framed hexagonal skylight.
The Tensothermâ„¢
fabric used in this retrofitted tensile roof offers diffused glare-free natural
daylight, enhanced temperature control, remarkable acoustics and innovative sustainability.
Photos: Birdair Inc.
14 SPECIALTY FABRICS REVIEW / August 2021

Specialty Fabrics Review August 2021

Table of Contents for the Digital Edition of Specialty Fabrics Review August 2021

Specialty Fabrics Review August 2021 - Cover1
Specialty Fabrics Review August 2021 - Cover2
Specialty Fabrics Review August 2021 - 1
Specialty Fabrics Review August 2021 - 2
Specialty Fabrics Review August 2021 - 3
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Specialty Fabrics Review August 2021 - Cover3
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