Builders Iron, 7770 Venture Ave NW, Sparta, MI 49345, US

Founded in 1964, PorterCorp provides design, engineering and manufacturing services for structural insulated panels. It operates more than 100,000-square-foot manufacturing facilities that offers construction services for over 1,000 buildings. PorterCorp offers PorterSIP and Space-Frames construction options. It also provides hexagon-, octagon- and dodecagon-shaped space frames. It constructs homes, cottages, offices, restaurants and churches. The company s division offers construction services for steel-frame sun shelters, gazebos, shade structures, and pergolas, trellises and carousel-style houses in nearly 100 standard designs. PorterCorp additionally provides standard powder coating, coat primer and galvanizing frame finishing options. The company constructs roof systems that feature plywood interior and polystyrene options.