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Non-Destructive Testing


As the construction contractor, your contract calls for installing 100 caissons, 8 ft diameter by 125 ft long, and the acceptance criteria require proof that no flaws are present. As the design engineer for the rehabilitation of a 100-year old bridge with no existing plans, you must know the length and condition of the piles. As the attorney for the Owner of a tunnel in which the tunnel boring contractor has filed a claim for changed conditions, you need expert advice on the subsurface conditions where the tunnel boring machine failed. All of these real-life scenarios call for NDT, and each requires a different method. Of course, there are many different methods, and they all have in common the capability to test material without destroying it.

Why Hager-Richter?

Education, Experience, and Equipment. Most of our people have MS or Ph.D degrees in physics, geology, and/or geophysics. Hager-Richter has performed NDT for many projects, ranging from the determination of rock quality along 7000 ft of tunnel in hard rock to the thickness of a 90-year old bridge abutment.

Survey methods and applications include:

Seismic Methods
General Applications:

  • Bridges
  • Buildings
 Specific Applications:

  • Determine length of piles
  • Determine depth of foundations

Ground Penetrating Radar (GPR)
General Applications:

  • Bridges
  • Buildings
  • Construction
 Specific Applications:

  • Detect voids, delaminations, and rebar
  • Determine thickness of concrete
  • Detect piles and footings

Ultrasonics
General Applications:

  • Bridges
  • Buildings
 Specific Applications:

  • Detect voids, delaminations, and rebar
  • Determine thickness of concrete
  • Detect piles and footings

Pulse Echo Impact
General Applications:

  • Bridges
  • Buildings
 Specific Applications:

  • Detect voids, delaminations, and rebar
  • Determine thickness of concrete
  • Detect piles and footings