GR Truss markets its building component products through building supply centres in Northern Ontario and Northern Michigan. The market segment spans from Sault Ste. Marie East to North Bay along highway 17 East (including Manitoulin Island), then North to Timmins, Kirkland Lake and James Bay area, along Highway 11 West to White River and back to Sault Ste. Marie along Highway 17. more... See more text