Liner Plate

Liner Plate

Full Length Corrugations & Lapped Joints for More Effective Stiffness & Ring Compression. Contech 2-flange Liner Plate provides optimum shaft stability and protection when constructing new utility tunnels, relining structures under highways and railroads and lining vertical shafts.

Contech 2-flange Liner Plate offers the highest continuous ring stiffness and high compression joint strength. 2-flange Liner Plate has effective stiffness that is more than twice that of the same gage (thickness) of 4-flange Liner Plate.

2-flange Liner Plate provides corrugations extending through the lapped longitudinal joint. When assembled, this liner functions as a corrugated pipe with continuous circumferential corrugations. The result is more effective corrugation performance for the highest stiffness and strength in the industry! Strength to handle the inconsistencies encountered on a regular basis. Extra safety factor when you need it most!

Benefits of Contech Liner Plate

  • Stiffest plate available - Usually does not require ring-beam stiffeners
  • Available in black (uncoated) or galvanized steel - Unsurpassed in strength and safety

Technical information for this product is centrally located in the technical guides section.

View Technical Information
Liner Plate for New Utility Tunnels and Enclosures

During tunnel construction, slough-ins and other concentrated loads are unpredictable and can be catastrophic without adequate protection. Our sufficiently stiff tunnel Liner Plate functions as a safety zone for workers and equipment. The required amount of liner stiffness depends upon soils, tunnel size and construction methods.

Structural Plate for Rehabilitating Bridges and Large Culverts

Bridges and large culverts can be relined by erecting our plate structures inside existing structures. Or, the new plate structure can be erected outside and threaded into existing openings. Our Plate Structures, including Two-Flange Liner Plate, are delivered to the job site unassembled. The plates and ribs are easily bolted together to form various shapes: round, vertical and horizontal ellipse, pipe-arch, underpass and arch.

Liner Plate for Vertical Shafts

Vertical shafts vary in diameter from a few feet to 50+ feet, and frequently have depths exceeding 60 feet. Whether microtunneling, slip-lining, and installing tunnels, maintaining shaft integrity requires a dependable support system. Our Liner Plate is unsurpassed in strength and safety. Once tunneling is completed, the liner plate is often dismantled and reused.

The Contech Advantage

Agency/Regulatory Guidance

Our team is ready to provide you with expert advice and assistance on local regulatory requirements, resulting in faster approvals.


Solution Development

Our engineers can review your requirements, weigh all options, and recommend the optimal solution to integrate with your site designs.

Technical Expertise

Our engineers can assist by providing product specific engineering calculations such as hydraulics, buoyancy, foundation reactions, and unit sizing.

Cost Estimates

We can quickly provide engineer’s cost
estimates to assist with your solution
selection process.

Site Specific Drawings

Our engineers can provide site-specific drawings for proposals, project meetings, and submittals, helping you be more efficient with your time.

On-site Assistance

Contractors know time is money, so we provide preconstruction meetings, delivery coordination, and on-site installation support to ensure a timely, smooth installation.