Advantages of precast
segmental bridge construction include:
precast prestressed concrete construction is extended to a span range
of 100 to
400 feet (30 to 120 m). Longer spans may be economical where use of
erection equipment is feasible.
segments may be fabricated while the substructure is being built, and
erection of the superstructure can be achieved.
control because of the repetitive industrialized manufacturing
the inherent potential of achieving high-performance concrete.
interference with Bridge Environment: The need for false work is
all erection may be accomplished from the top of the completed portions
bridge. This may be of particular importance for high-level crossings
cases where it is necessary to minimize interference with the bridge
The effects of
creep and shrinkage are substantially minimized through the use of
segments that have matured to full strength.