TECO^® is North America's truly independent, customer-focused, third-party certification and testing agency for structural building products. These include engineered wood products, — like OSB, plywood, LVL, I-joists, rim board, and glued-laminated timber — structural adhesives, and deck and guardrail components and systems. With clients across North America, South America, and Europe, and with accreditations in the United States, Canada, and Japan, the TECO TESTED^® certification mark is recognized and respected as a mark of quality and innovation worldwide.