Frequently Asked Questions

If you would like further information or would like to discuss your project in detail, please call us at 800-446-5700.

T-WALL drains via the open vertical joints in the wall face. A geotextile fabric backing prevents fine materials from migrating through. These filtered joints act as weep holes and allow water to drain, preventing hydrostatic pressure build-up. Please note that the backfill in use must be permeable and free draining in order for the system to drain in this manner.

Underdrains are not typically required for use with T-WALL. There may be certain conditions that call for additional drainage, such as use of retained fills with high fines, use of non permeable granular fills (geofoam, flowable fill), or site issues including but not limited to potential flooding with a rapid drawdown condition.

The height of T-WALL is only limited by the feasible stem length and site foundation conditions. In some instances the maximum height is also governed by DOT guidelines. The fifty-foot abutments on our Kosciuszko Bridge project in New York are our current highest walls. 

It is the responsibility of the owner/engineer to provide a geotechnical report that provides a site analysis. The analysis should include:

  • Bearing Capacity
  • Global Stability
  • Settlement/Consolidation
  • Scour
  • Ground Water/Surface Drainage

In addition, the following information is required in order to provide an accurate, efficient design for each project:

  • Project Specifications
  • Geotechnical Report with Recommended Bearing Capacity
  • Existing Topography
  • Plan and Profile of Proposed Walls
  • Surcharge Loads on the Wall (such as traffic or buildings)
Yes. T-WALL can and has been used as pile-supported and true abutments. See examples here.

T-WALL is produced in the qualified precast plant closest to the project. All of our precasters must be NPCA, PCI, and/or State DOT certified.

T-WALL is soundwall compatible. CIP barriers can be attached or installed using posts within the wall mass.
Yes, T-WALL can be used in water or other corrosive environments. T-WALL has no exposed metal, eliminating corrosion concerns. All rebar reinforcements have a minimum of two inches of concrete cover. Reinforcing steel can also be epoxy coated or galvanized, and in special cases corrosion resistant and stainless steel may be specified.



See more water projects.