The
Greene County Justice Center project had a great need
for site space, but a considerable lack of it. The facility
needed to house approximately 390 beds for the expansion
to the existing jail facility, and it needed to house
the entire sheriff's department, as they had outgrown
their existing facilities. All of this had to meet current
correctional facility standards, and it had to happen
on a tiny site that previously served as parking for
the courthouse. It became clear very early on that the
optimum solution was to place the jail above the sheriff's
office, but the jail cell loading was immense, presenting
a serious framing challenge.
By
working closely with our firm during the design stages
of the project, a solution for the framing was found.
The second level would be built on a superstructure
consisting of 50" deep prestressed double tee decks,
with additional cast in place topping. These decks would
span over a very heavy column and beam system, and would
be supported by the exterior walls with an integral
"yoke" beam. The lower level was left very open by using
the column and beam supports, with the only walls extending
into the lower levels being the minimum shearwalls needed,
plus the stair and elevator towers. The architect then
had the freedom to design the lower office layout in
the most effective way. The cell system on the second
level was also entirely precast concrete, using flat
horizontal walls and transverse spanning decks to enclose
the cells.
This
entire system of cells was built on top of the high-capacity
double tee deck, almost as if the cell system was an
entirely different structure being constructed inside
the shell of the justice center. To facilitate economy
the exterior walls not only served as support for the
structural framing, they also featured an architectural
finish, which included a vertical ribbed pattern at
the lower level to accent the structure as well as a
variable reveal pattern. The walls were further complicated
by casting insulation into the panel in a sandwich fashion.
These walls served triple duty and definitely helped
the project move forward much more efficiently.
The
complexity of the framing was closely paralleled by the
complexity of the construction sequence. The small site
had to facilitate two cranes and erection crews, and the
delivery of precast to each crew. This sequence was carefully
mapped out as the construction of the facility was cut
into four segments, with each segment interlaced with
those adjacent to it. The tight construction schedule
along with very difficult framing dictated detailed planning
very early in the project to insure that the products
we cast could actually be erected.
The
Greene County Justice Facility is among the most technically
advanced correctional facilities in the nation, acting
as an example of how to efficiently build this type of
facility. This is due in part to the unique framing and
solutions provided by using prestressed concrete products
from Prestressed Casting Co.