SCI is a family owned and operated manufacturer of quality wood and light gauge steel roof and floor truss systems ranging in ... size from the smallest home project, to large custom homes, to multi million dollar apartment jobs.. We also supply Simpson Hardware, Glu-Laminated, PSL, and LVL beams and SCI's own Trim End Truss product called Quick Joist. SCI has served our customers and employees for over 53 years and remains one of the premier component manufacturers in the nation. read more