DESI understands that special inspections and testing services (Quality Control / Quality Assurance, QA/QC) are critical components to ensure that all requirements developed during planning and design stages of the project are correctly incorporated during construction. Owners, architects, engineers, designers, construction managers, and general contractors involved in any construction project require assurance that construction methods and materials meet project specifications and satisfy applicable building code requirements. DESI is an IAS accredited Class 1 special inspection agency in New York City.

DESI provides the owner a design/planning/construction team along with critical information to ensure the quality of construction and code compliance. When QA/QC services are correctly planned and implemented, they can protect all involved parties from costly mistakes, accelerate construction processes, and reduce future maintenance costs. DESI provides full-service construction material and testing & consulting services, using accredited laboratories. We provide broad-based Special Inspection (QA/QC) services in:

  • Structural Cold-formed Steel
  • Structural Steel - Erection & High-Strength Bolting
  • Welding: Steel Piping, High Pressure Steam Piping, High Pressure Gas Piping, Aluminum
  • Concrete - Cast-in-place & Precast
  • Concrete - Prestressed
  • Masonry
  • Soils Investigations
  • Soils - Fill Placement, In-place Density
  • Soils - Site Preparation
  • Pile Foundations and Drilled Pier Installation
  • Underpinning
  • Shallow Foundations
  • Excavation - Sheeting, Shoring and Bracing
  • Seismic Isolation Systems
  • Non-Destructive Testing of Structural Steel
  • Concrete Lab Testing
  • Rock Anchor and Bolt Testing
  • Firestopping
  • Batch Plant
  • Static and Dynamic Load Testing
  • Pile Integrity Testing
  • Soil Testing (Gradation, Atterberg, Consolidation, etc.)
  • Soil Nails and Anchors
  • Sprayed Fire-Resistant Materials
  • Pre- and Post-Construction Building Condition Surveys
  • Oversight of Soldier Pile Lagging Installation
  • Tie-back Testing
  • Special Inspection of Concrete, Steel, Rebar CMU Masonry Walls & Foundation
  • Field Inspection Services
  • Emergency Action Plan (EAP)
  • Building Condition Survey & Reporting
  • Special Inspections including Concrete, Rebar, Steel, and Shotcrete
  • Rock Bolt Testing
  • Pre-construction survey report
  • Special Inspections
  • Impact Assessment Report
  • Initial Inspections of Station and Tunnel Sections to Document Existing Leaks
  • Field Inspections to Monitor Crack Grouting
  • Field Inspections to Monitor Dye Testing Program to Trace Leaks
  • CADD support
  • Special Inspections of Concrete, Rebar & Steel
  • Quality Management for Construction Operations
  • Grout Testing
  • Anchor Torque Tests
  • Anchor Tension Tests
  • Site Preparation Inspections
  • Concrete Repair Inspections
  • Mockup Testing
  • Special Inspections Steel Bolting
  • Special Inspections Steel Welding