Structural Plate Products



Ultra•Cor is the world's strongest steel structural plate. 

With the introduction of Ultra•Cor, Big R Bridge is taking engineered structural plate to new dimensions in capability and performance.

Ultra-deep corrugations support the world’s heaviest loads.

Ultra•Cor combines all the advantages of lightweight construction with previously unheard-of strength and durability. In short, Ultra•Cor is the largest, strongest and most-durable corrugated metal structure in the world today. 


  • The world’s strongest corrugated steel structural plate
  • Handles extreme loadings
  • Spans can exceed 98' (30 m)
  • Stockpile heights can reach greater than 98' (30 m)
  • Corrugation profile of 20" pitch × 9.5" depth
  • Available in: Box Culverts and Standard, Low, Medium, or High Profile Arches
  • Bottomless designs are environmentally-friendly


  • Bridges and Tunnels
  • Grade Separations
  • Road or Rail Underpasses
  • Stream Crossings
  • Box Culverts
  • Heavy Haul Road Arches
  • Stockpile Tunnels
  • Portals and Canopies
  • Storage Structures

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Revolutionary strength and durability. 

Ultra•Cor is breaking new ground in efficient infrastructure solutions for the mining, transportation and public works sectors.


Available in a variety of shapes for the largest applications:

Cross-section profile drawing of AIL Super•Cor Box Culvert Cross-section profile drawing of AIL Super•Cor Standard Arch
Cross-section profile drawing of AIL Super•Cor Low Profile Arch
Cross-section profile drawing of AIL Super•Cor Medium Profile

Box Culvert

Standard Arch

Low Profile Arch

Medium Profile Arch

Cross-section profile drawing of AIL Super•Cor High Profile Arch

High Profile Arch

View a step by step steel structural plate installation

The AIL Group is big on mining!

AIL MINING have been supporting the most successful mine sites for over 40 years.

» Visit our mining website


Super•Cor overpasses built in 120 days.

» Explore this project


Our structural plate solutions are easy to ship and install.

» View step by step installation