Welcome to Interra Inc.


Interra Inc. provides consulting, special inspection and non-destructive testing services to a variety of clients in the public and private sectors.

Special Inspection

Our team specializes in various aspects of construction inspection, such as structural steel inspection, drilled-in anchors and spray-applied fireproofing.

Non-Destructive Testing

Interra offers ultrasonic, magnetic particle, liquid penetrant testing, as well as ground penetrating radar services. ASNT Level III non-destructive testing and consulting are additional assets that Interra possesses.

Mechanical and Special Testing

Proof load testing, reinforcing steel location and verifications, structural member load testing, and pressure testing are services which Interra can provide. Weld procedure specification testing and writing are also available.

Quality Assurance / Quality Control

Interra is an independent source that assesses compliance with industry protocol that adheres to AISC, ICC, ASNT, AWS and API Standards. We also provide consultation, representation, manual preparation (AISC, ASME, Clark County, and City of Los Angeles), auditing, personnel training, qualification and examination.