Profile: Greenwood Structures offers storage sheds and garages. We provide a broad variety of storage building styles and colors. Our products are available in a wide range of specifications. Our buildings are constructed on 4"x 4" pressure treated skids with standard 2"x 4" framing 16" on center, 5/8" plywood flooring, 1/2" roof plywood, dura-temp T 1-11 siding, solid wood corner trim and adjustable braces on swinging doors.