Commercial Architecture May 2017 - 39
cation. The benefits of a custom, unitized curtainwall
During the design-assist phase, IWR collaborated with
system allowed innovation and flexibility to combine
the glazing contractor to design the custom unitized
aesthetic, performance, and economic considerations
curtainwall systems. The design team started with a
into a solution that met the needs of the hospital. In
chassis from previous systems, and the system was
addition, the use of the unitized wall system for the
modified to fit the aesthetic component of the design
expansion needed limited space for installation and
intent. New extrusions were made, and, in the end, a
storage. The expansion was completed in November
new system was designed that was specific to the needs
2016, providing enhanced facilities and medical care
Learn more about Trespa panels.
of the hospital.
for families in the Missouri counties of St. Charles,
Learn more about IWR and the MHS Legacy Group.
A large section of the building-envelope's wall pan-
Want more information? To download
the information listed below, visit
Circle 7 on the Reader Service Card.
Warren, and Lincoln. CA
els was built off-site in a controlled shop environment. The sheathing and air and water barriers were
applied to the wall panels in a weather-controlled environment, allowing production to continue during
Prefabricating the wall panels offers many advantages to contractors and facility managers. The factory-built wall panels allow more square footage to be
erected at one time, require a minimal laydown area,
and provide a better quality-control process in lieu of
the traditional stick-built system.
Once on-site, the pre-built units were hoisted onto
anchors and connected to the building. This system
was ideal for the project as it sped up the installation
process, reduced field labor costs, facilitated higher
performance, and provided more regular conditions
for panel optimization.
Both of the rainscreen cladding systems used aluminum composite material (ACM) and phenolic panels from Trespa North America Ltd., New York, that
were attached to a custom-designed, thermally isolated sub-girt system. The architect wanted an organic
look achieved by using directional grain and an anodized aluminum finish to the ACM panel systems. The
Trespa panels were installed in a random pattern featuring one color while rotating the panels in varying
degrees. By varying the orientation, the overall look
appeared to be asystematic, meeting the architect's
desired texture and aesthetics.
The project's successful completion was aided by a
value-management log that IWR management used.
The log captured the ideas generated during internal
MFM SubSeal™ is a pre-fabricated, self-adhering, self-sealing
waterproofing membrane that stops water and moisture
in its tracks! This advanced system aggressively bonds
to prevent damage caused by water penetration.
Multi-Purpose Waterproofing Protection for:
* Through-Wall Flashings
* Foundation Walls
* Plaza Decks
* Sills, Pot Shelves, Parapets
* Parking Garages
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* Vertical or Horizontal
and external meetings where potential design chang-
* Aggressive Bonding
es, associated costs, performance, and schedule im-
* Extreme Moisture
pacts related to each concept were discussed. The
tracking method allowed the team to stay organized
and maintain focus on moving toward the completion date.
The log management also allowed flexibility with
ICC-ES ESR-2783 (AC148), ICC-ES ESR-3980 (AC38),
ASTM D 1970
the design elements that were needed in identifying
* Available in 40 or 60
* Self-Adhering for Fast
areas of opportunity to reduce cost in line with the
IWR was hired as the sole building-enclosure contractor to help streamline the design and construction process and ultimately accomplished the goal
through commitment to organization and communiCIRCLE 216