Existing concrete and structural steel condition assessment:
NTH’s Value Added
Our experienced professionals provide a comprehensive assessment and well documented conclusions that support optimum recommendations for rehabilitation.
Structural Condition Assessment & Rehabilitation
Concrete and Structural Steel Services
Rehabilitation of component or system failures can be costly and extensive. NTH’s Infrastructure Rehabilitation team provides comprehensive assessments to evaluate the condition of a structure’s concrete and structural steel and avoid failures. Our assessment process includes collection of data, evaluation of current conditions, and recommendations for rehabilitation.
The assessment begins with the review of available plans, specifications and other information relative to the original construction details. We then conduct a visual nondestructive examination of the structural steel members and accessible portions of concrete to identify signs of problems such as settlement, displacement of structural elements, corrosion and loss of cross-sectional area, cracking, loose bolts, or other indications of distress.
Testing and Sampling
Our experienced team members perform nondestructive/destructive testing and sampling to complete a comprehensive assessment. They conduct selective sounding surveys, including the use of a chain drag or hammer to detect and identify delaminations in the concrete, and utilize pachometer (R-meter) surveys to identify the location and spacing of reinforcement steel in the concrete. Our AWS Certified Weld Inspectors visually review and test connection and repair welds, using ultrasonic testing, magnetic partical testing, and a dye penetrant process. Bolted connections are reviewed for tight steel at the faying surfaces and torque tested for proper bolt tensioning.
At the conclusion of our assessment, NTH professionals prepare and issue a written report that describes the existing conditions, observations of the structural integrity of the components reviewed, and sketches of the structure. We provide general rehabilitation recommendations for noted deficiencies and include photographic documentation, field measurements and conclusions to substantiate our observations and engineering assessments.