Simpson Strong-Tie Company is safety and innovation, plain and simple. The company s primary objective is to help build safer structures. Simpson Strong-Tie leads the timber connector industry in hanger design and holds more patents than its competitors in the industry. The company s systems approach to the building process addresses complex engineering and construction issues through research and development, testing and manufacturing. Simpson is ISO 9001-2000 registered and implements consistent quality in its products and services. Its parent company, Simpson Manufacturing, is a growing international company that also specializes in the manufacture and marketing of building products. Established in the mid-1950s, Simpson Strong-Tie Company has offices in McKinney, Texas.