Advantages of using
post-tensioning for your next parking structure project:
and Life-Cycle Costs Savings:
Post-tensioned structural systems often provide initial cost savings
life-cycle costs when compared to other framing systems.
of parking spaces during
maintenance work results in loss of revenue and inconvenience.
floors are relatively crack-free, resulting in minimal maintenance
Post-tensioned structural systems
eliminate closely spaced joints and help ensure water-tightness by
floor in bi-axial compression, thereby controlling and counteracting
and flexural cracks.
The elimination of closely spaced
joints results in a superior riding surface. Differential deflections
joints are not an issue in cast-in-place post-tensioned floors.
The long spans, wide beam spacing,
and flat surfaces provided by post-tensioned structures enhance
improve patron security. The open structural systems also enhance
create a more welcoming environment.
slab thickness and beam widths
commonly used in post-tensioned structures provide fire ratings that
long column-free spans and is adaptable to other functional
requirements of parking
structures such as the need to accommodate slopes to drains, straight
ramps, warped surfaces that provide smooth transitions between ramps
floors, and irregular plan layouts.
construction allows for versatility in structural layout. Structural
configurations are virtually limitless. Cast-in-place forms can be used
create helical ramps, spiral ramps, compound slopes and more.
shapes and forms are
easily achieved in a cost-effective manner with cast-in-place
Architectural treatments of exposed concrete are easily achieved.
Structural Depth: Post-tensioning
structural depths by one-third or more in comparison to other systems.
case of underground parking garages, structural depth reduction is
reduce excavation, soil retention system costs, and dewatering costs in
with high water tables.
and Vibration Control: The
pre-compression, draped tendons
and the monolithic nature of cast-in-place concrete garages
reduce deflection problems. The monolithic construction, continuity and
connections between beams and columns reduce vibrations.
slabs, beams and columns provide rigid frame action to resist wind and
performed well in the 1971 San Fernando, 1989 Loma Prieta, and the 1994
Northridge earthquakes. Research has shown that, under some conditions,
unbonded post-tensioning improves the behavior of moment frames under
loads. Code provisions developed by the Building Seismic Safety Council
the use of unbonded post-tensioning in ductile moment resisting frames.
and experience have shown
that post-tensioned structures inherently provide structural integrity
abnormal and catastrophic loading. Well detailed cast-in-place
structures have significantly higher structural integrity, redundancy
resistance to catastrophic loading than precast systems.
the time and cost of hauling
prefabricated pieces from the plant to the job site and the need for
lifting are eliminated. Large panel flying forms, modular forming
ever improving concrete technology continue to enhance the construction
and economy of cast-in-place post-tensioned parking structures.
Over the life of the structure, the cost to
maintain cast-in-place, post-tensioned parking garages is typically