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Precast
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Precast Concrete Manholes
 Precast
concrete manholes are an integral component of any modern
sewer system. A properly designed and installed precast concrete
manhole system provides superior watertight performance compared
with competing methods and materials. A typical precast concrete
manhole can be installed 500 feet deep and more, because lateral
forces act equally around the periphery, which places the
section in pure compression – the ideal state for concrete.
Precast concrete manhole sections are produced in a controlled
environment, thus exhibiting high quality and uniformity.
This Web page content has been developed
by the NPCA Manhole Product Committee.
Manhole
Product Promotional Sheet (PDF)
Vacuum
Testing Warning (PDF)
Vacuum Testing
Recommended
Manhole Installation Procedures (PDF)
Related Articles
MC
Magazine, September/October 2004, "Knowing when to restrain
pipe"
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