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  • Bridges

    Thousands of bridges throughout the country are in need of replacement – nearly 30 percent are rated by the government as “deficient.” Corrugated steel pipe and structural plate systems provide a fast and economical solution.

  • Culverts

    CSP culverts and storm drains provide reliable, economical solutions to handle stream or storm flow, including debris, to protect streets, highways and railroads from flood damage.

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Welcome to the National Corrugated Steel Pipe Association

By the time you finish reading this, the world will have changed. An old concept may have gained new traction or a product will be poised to take the world by storm. And so it is with corrugated steel pipe (CSP). New solutions, fueled by rapidly expanding technology and the industry’s advancements, have made steel more reliable and greener than ever.

CSP drainage solutions are ideal for entire stormwater systems, underground storm chambers and bridge replacements. Steel meets our national, regional and local demands with the most customizable and economical solutions that deserve to be specified.

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Field Reports


Get the Real Deal on Steel
Field Reports

CSP installations are subjected to routine critical evaluation to establish accurate, predictable service life guidelines. Read the latest study on aluminized type 2 installations.

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eSpan 140


Customized Steel Solutions in 3 Simple Steps
eSpan 140

A complimentary web-based design tool which provides customized steel solutions for bridges up to 140 feet. Get standard designs for corrugated structural plate, corrugated steel pipe, rolled beam, and plate girder.

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Case Study


STEEL: Proven 100-Years Strong
Case Study

Read how Polymer coated CSP storm water management system provides 100-year service life and meets restricted site discharge of SEPTA’s Olney Station.

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CSP Facts


With 100-year service life on the greenest and most cost-effective product in the marketplace, the
new steel is the proven choice for today’s environments.

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The Real Deal


The Real Deal

Visit the Real Deal on Steel to find additional information on the unique strengths and benefits of corrugated steel pipe and why you should specify CSP on your next project.

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Answer Desk


Get the Real Deal on Steel
Answer Desk

For help on specifications and other technical questions or for more information on CSP solutions, NCSPA experts are ready to help.

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