Special Inspections

DnA provides a wide range of design services with a strong focus on material and forensic testing services. Both destructive and non-destructive testing is performed as cleanly and as non-invasive as possible when demanded by the project scope. DnA adds value to the clients’ project through the incorporation of efficient and accurate laboratory testing and timely reporting to the project design.

We build value for our clients through the strength of our customers’ satisfaction and by consistently producing superior results. Our services and ingenuity have allowed our clients and their project teams to revolutionize the way they gather, manage, distribute and communicate information.

Unlike other firms, DnA is a quality focused firm and special inspections is its primary business. All our personnel are skilled in special inspections. DNA’s core special inspections staff includes professionals specializing in all phases of special inspection.


  • Structural Steel – Welding
  • Structural Steel – Details
  • Structural Steel – High Strength Bolting
  • Structural Cold-Formed Steel
  • Concrete – Cast-In-Place
  • Concrete – Precast
  • Concrete – Prestressed
  • Masonry
  • Subgrade Inspection
  • Subsurface Inspection
  • Subsurface Conditions- Fill Placement & In-Place Density
  • Subsurface Investigations (Boring/Test Pits)
  • Deep Foundation Elements
  • Helical Piles
  • Vertical Masonry Foundation Elements
  • Wall Panels, Curtain Walls, and Veneers
  • Sprayed-fire resistant materials
  • Mastic and Intumescent Fire-resistance Coatings
  • Exterior Insulation and Finish Systems (EIFS)
  • Smoke Control Systems
  • Mechanical Systems
  • Fuel-Oil Storage and Fuel-Oil Piping Systems
  • High-Pressure Steam Piping (Welding)
  • High Temperature Hot Water Piping (Welding)
  • High Pressure Fuel-Gas Piping (Welding)
  • Structural Stability – Existing Buildings
  • Excavations – Sheeting, Shoring and Bracing
  • Underpinning
  • Mechanical Demolition
  • Soil Percolation Test – Private On-Site Storm Water Drainage Disposal Systems, and Detention Facilities
  • Private On-Site Storm Water Drainage Disposal Systems, and Detention Facilities Installations
  • Individual On-site Private Sewage Disposal Systems Installation
  • Soil Percolation Test – Individual On-site Private Sewage Disposal Systems
  • Sprinkler Systems
  • Standpipe Systems
  • Heating Systems
  • Chimneys
  • Fire-resistant Penetrations and Joints
  • Aluminum Welding
  • Flood Zone Compliance
  • Luminous Egress Path Markings
  • Emergency and Standby Power Systems (Generators)
  • Post-installed Anchors
  • Seismic Isolation Systems
  • Concrete Design Mix
  • Concrete Sampling and Testing
  • Fire Alarm


  • Preliminary
  • Footing and Foundation
  • Lowest Floor Elevation
  • Structural Wood Frame
  • Energy Code Compliance Inspections
  • Fire-Resistance Rated Construction
  • Public Assembly Emergency Lighting
  • Final


  • Anchor Pull Tests
  • Steel Coupon Testing
  • Concrete Core Testing
  • Windsor Probe Testing
  • Masonry Prism Testing
  • Soil Analysis
  • Ground Penetrating Rebar
  • Rebar Mapping – Ferro scanning and GPR


  • Ultrasonic
  • Magnetic Particle
  • Liquid Dye Penetrant
  • Radiographic

Proudly Accredited by International Accreditation Service, Inc.