OverviewALT2 ApplicationsDOT InformationSuccess StoriesResources
Aluminum Coated Type 2
![corrugated steel pipe detention system large volume detention system](https://ncspa.org/wp-content/uploads/2019/01/DelanoTurf-PDF-003_20190118110238014_compressed-300x180.jpg)
Aluminum coated type 2 CSP has been installed at thousands of sites over the past 50 years and many of these sites have been and are still being monitored for performance. Recent AK Steel research has indicated that 14 gage ALT2 CSP can achieve a 100-year service life when the environmental conditions have a pH of 5 to 9 and a resistivity greater than 1500 ohm-cm.
For more information download our Pipe Selection Guide found here.
ALT2 Applications
DOT Information
The below is a map of the states that currently accept ALT2 coated pipe and plate in their specs.
Success Stories
![Holland Creek buried steel bridge](https://www.ncspa.org/wp-content/uploads/2024/07/Holland-Creek-2-1_resized-300x225.jpg)
Project Spotlight: Holland Creek Crossing
By: Atlantic Industries Limited A Bridge to the Future: Holland Creek’s Ultracor Innovation Holland Creek is home to Western Canada’s first deep corrugated buried structural ... Read more
![highway Infrastructure Improvement](https://www.ncspa.org/wp-content/uploads/2024/07/IMG_3716_resized-ribbon-300x225.jpg)
2024 Project of the Year – ALT2 Coating: I-35 Overpass Roadway Improvements
By: Contech Engineered Solutions Interstate 35 Infrastructure Enhancement Project The Iowa Department of Transportation (DOT) initiated a comprehensive infrastructure project to improve Interstate 35. The ... Read more
![](https://www.ncspa.org/wp-content/uploads/2024/07/photo12-ribbon-300x200.jpg)
2024 Project of the Year – Polymer Coating: West Shore Lake Pontchartrain
By: Contech Engineered Solutions Flooding Challenges and Solutions in Louisiana’s River Parishes: The Need for Protection The River Parishes of Louisiana, including St. Charles, St. ... Read more
Studies, Resources & Marketing Materials
- The Measured Performance of Aluminized Type 2 Steel Pipe in Storm Sewer Applications in the North Georgia Region – A research project on the durability of Aluminized Steel Type 2 pipe
installed in the metro Atlanta area has resulted in an outstanding report of the product’s performance.
- Durability of Aluminized Type 2 Corrugated Steel Pipe Exposed Throughout the United States – A report by Elzly Technology Corporation documenting the performance and environmental conditions of aluminized type 2 coated CSP in 11 states and parts of Canada.
- Service Life – ALT2 Field Reports
- EFFECTS OF GAGE ON PIPE DURABILITY: Based on 75 Years Minimum Service Life at 16 Gage – For Worst-Case Conditions Within The Recommended pH/Resistivity Ranges
- Meeting New Durability Standards and Expanding Environmental Limits with Corrugated Steel Pipe
- The Measured Performance of Aluminized Type 2 Steel Pipe in Storm Sewer Applications in the North Georgia Region – A research project on the durability of Aluminized Steel Type 2 pipe