building slabs allowed for a flush transition from
the building slabs to the insulated floor level,
avoiding the need for entry ramps. Each environmental room has a 36-in. by 78-in. clear opening
entry door with a 14-in. by 24-in. dual pane
vision panel, self-closing hinges, inside safety
release, and a hydraulic door closer.
The insulated wall and roof panels were covered
with a 24-gage galvanized steel skin with a white
painted anti-microbial factory installed finish on the
room interiors, while the insulated floors are covered with a 14-gage galvanized steel skin and topped
with a chemically-welded sheet vinyl flooring with
a 4-in. integral coved base around the inside room
perimeters. The exterior finish of the wall and roof
panels consist of a standard white polyester painted
finish over the galvanized steel skins.
The two stability room structures, which
measure approximately 10-in. by 12-ft. 6-in.,
consist of insulated dry wall construction with
vapor barriers located in the walls and ceiling. The dry wall construction was required
to accommodate the specific user’s needs and
was a viable approach based on the operating
parameters of the rooms.
The relative humidity control needed for the
drosophila room and the two stability rooms
is provided using a combination of ultrasonic
humidifiers, electric steam generators, desiccant dehumidifiers, and latent stripping coils,
depending on the performance needed. These
devices are installed immediately above or adjacent to each specific room area.
Each room has its own individual control panel
located adjacent to the entry door associated with
each room area. The control cabinets are NEMA-1,
lockable, steel enclosures provided with a white pow-
der coated painted finish. These control panels house
the control systems needed for both temperature
and humidity, an independent high/low temperature
alarm system, a dry alarm contact for connection to
the BMS system, and a seven-day, 10-in. circular tem-
perature chart recorder.
The controllers and alarms are accessible
through a lockable transparent acrylic cover
located in the face of the control panel, offering
secure easy access to these devices for making
operation adjustments without exposing the user
to the electrical wiring inside the panel.
The wide range environmental rooms utilize
Honeywell UDC-3200 PID controllers for temperature control, while the drosophila room as well
as the stability rooms utilize an Automation Direct
PLC control system with a 6-in. color touch screen
for controlling both the temperature and humidity
levels in each area. The PLC systems offer greater
flexibility in controlling the multiple systems associated with the temperature and humidity control
of these areas without the need of adding additional
PID controllers for each function.
Adapting the plan and meeting the deadline
Particular challenges that arose on this project
stemmed from the fact that the stability and drosophila rooms were added after the original scope
was determined, and so existing rooms needed
to be adapted for these new uses. That meant
we successfully worked to coordinate mechanical, duct work, and vapor requirements with no
change in the overall schedule.
Working together, all of the Albert Sherman
Center stakeholders ensured there was an efficient coordination process, working on layout
and design well before the start of construction.
The entire building was designed using building
information modeling (BIM), which meant that
all connections were laid out virtually beforehand. In order to hit the Sherman Center’s
timeline for completion of the environmental
rooms, the entire team mobilized. The design was
released in January 2012 and finished in April
2013—a timeline of 16 months that supported
the overall schedule of the building.
David Doherty has extensive experience managing
large scale science and technology projects. As Senior
Project Manager, Doherty is responsible for overall
project administration, management, and cost reporting. In preconstruction, he provides constructability
reviews and helps direct the permitting and approvals
process. During construction, Doherty plans, monitors,
and supervises construction activities to ensure compliance with client requirements and project goals.