Founded in 1947, Crane Group is a private, family-owned holding and management company. Its portfolio companies include manufacturing and building trades. The group operates Crane Building Products, which offers a range of residential door components and decking, railing, and fencing products for homeowners. Crane Group also manages Crane Investment Company. Its Crane Materials International offers a line of seawalls, docks, piers and gangways for marine contractors and engineers throughout the United States. The group additionally manages Suburban Steel Supply, which provides a range of field erection, rebar and concrete accessories. Crane Group operates Contractors, which offers painting, roofing and carpentry services for the residential and commercial areas.