7NT Engineering

Overview Capabilities Process Projects Contact

Capability overview

Inspection / Testing

7NT provides construction inspection and materials testing services that keep complex field work aligned with specifications, documentation needs, and quality expectations. The original 7NT service page identifies qualified inspection personnel and accreditations including AASHTO, ODOT, INDOT, and USACE.

Construction inspection and materials testing services provide quality assurance during construction, helping owners confirm work is being performed according to plans, specifications, and accepted testing standards.

7NT inspection personnel support underground work, confined-space work, earthwork, structural components, pavements, masonry, concrete, asphalt, roofing, and laboratory coordination.

What this includes

Capabilities

TBM, shaft, utility, levee, foundation, and earthwork inspection
Reinforcing steel, structural steel, and weld inspection
Concrete placement, batch plant, flatness, and precast inspection
Soil, pavement, asphalt, masonry, and non-destructive testing
Construction administrative services and project documentation
Laboratory and field testing coordinated with engineering teams

Construction inspection services

TBM inspection
Shaft inspection
Utility inspection
Levee inspection
Foundation inspection
Earthwork inspection
Reinforcing steel inspection
Structural steel inspection
Weld inspection
Concrete placement inspection
Batch plant inspection
Floor flatness testing
Precast concrete inspection
Pavement inspection
Construction administrative services
Project documentation

Materials testing - soil

Field Density by Nuclear Method
Moisture-density relationship
Atterberg limits
Particle size analysis
Unconfined compression testing

Structural steel

Magnetic Particle Testing
Ultrasonic testing
Bolting inspection
Welding inspection
Shop fabrication inspection
Field erection inspection

Concrete

Slump testing
Air content testing
Temperature testing
Compressive strength cylinders
Concrete placement observation

Field and lab testing

Soil density testing
Compaction testing
Concrete testing
Asphalt testing
Masonry testing
Aggregate testing
Laboratory coordination
Field reporting
Test result documentation

Roofing services

Roofing Materials Verification
Roofing observation
Roofing fastener pull testing
Roofing membrane inspection
Roofing documentation
Roofing deficiency tracking

Asphalt

Asphalt plant inspection
Asphalt density testing
Asphalt temperature testing
Asphalt coring
Asphalt thickness measurement

Masonry

Masonry prism testing
Mortar testing
Grout testing

How 7NT works

Service process

Review project specifications and define the inspections, tests, and documentation required.
Coordinate qualified field and laboratory staff with the construction schedule.
Perform field observations, sampling, and tests while documenting conditions and results.
Communicate results quickly so the project team can correct issues and maintain progress.