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Unlike adjustable risers that rely on mechanical expansion, our fixed risers are a solid, single-piece casting. This minimizes any weak points or moving parts, ensuring the riser will never collapse or shift under extreme localized shock loads.
Engineered specifically for DOT compliance. These fixed risers are the standard choice for major highway resurfacing, airport tarmacs, and high-speed intersections where failure is simply not an option.
Available in increments of 1/4" to ensure your manholes match the final asphalt grade with millimeter precision. No shimming, no stacking, no settling.
View Dimension ChartScroll horizontally to view available foundry castings