Firm Overview
Tai and Associates is a professional geotechnical engineering firm specializing in subsurface exploration and related consulting services on behalf of owners and other professionals (such as architects, structural engineers, civil engineers, construction teams, and special contractors).  We are highly experienced, having worked on over 1,500 projects throughout the southeastern United States in the past ten years alone.
Our Services
Services we provide include (but are not limited to) the following:
Geotechnical Engineering
  • Subsurface Investigation
  • Shallow Foundation
  • Deep Foundation
  • Mat Foundation
  • Retaining Wall
  • Tie Backs and Anchors
  • Settlement Analysis
  • Vibration Study
  • Dynamic Compaction
  • Vibro-Compaction
  • Subgrade Improvement
  • Soil Mixing
Construction Services
  • Special Inspections
  • Density Testing
  • Concrete Inspection/Testing
  • Rebar Inspection
  • Structural Steel Inspection
  • Fireproofing Testing
  • Masonry Inspection
  • Borrow Investigation
  • Foundation Installation
  • Pile Load Testing
  • Caisson Bearing Test
  • Rock Anchor Testing
Civil Engineering
  • Pavement Analysis
  • Dams and Dikes
  • Slope Stability
  • Seepage Analysis
  • Groundwater Control
  • Slope Protection
  • Site Improvement
  • Permeability
  • Pavement Repair
Other Services
  • Phase I ESA
  • Excavation Shoring Design
  • Blast Monitoring
  • Expert Witness
  • Engineering Geology
  • MSE Retaining Wall
  • Settlement Monitoring
  • Instrumentation Monitoring
  • Failure Analysis
Firm History
Tai and Associates was founded in 1981 by Danny Tai.  When Matthew Ryan started working with Danny in 1996, they both worked hard to apply common sense principles to provide cost effective solutions to geotechnical problems. The company name was changed to Tai and Associates, PLLC in 2004 reflecting Matt's partner status. Matt has been President since Danny's retirement, and continues to carry the same basic principals of common sense solutions.

Phone: (919) 782-9525
Fax: (919) 782-9540

Mailing Address

PO Box 90067
Raleigh, NC 27675

Physical Address

6301-B Angus Drive
Raleigh, NC 27617

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Quick Facts
  • Founded in 1981
  • Serves North and South Carolina