An entire structure utilizing fiber reinforced plastic (FRP) pultruded structural shapes is provided for use in decks, docks, and boardwalks. This deck system for building decking, docks, boardwalks, walkways, gazebos, hot tub decks and spas can be built either to and extending from the exterior side of residential or commercial structures or as an independent, freestanding structure. The invention is assembled from FRP pultruded components comprising several systems which include a weight bearing support system, flooring system, safety system, roofing system, and decorative system. Components of the invention including but not limited to vertical support posts, horizontal decking, railing, stairs, gates, doors, frames and supporting members will be manufactured from FRP pultrusion structural shapes and composite sections using corrosion resistant hardware and adhesives. The use of fiber reinforced plastic (FRP), allows for the manufacture of a corrosion-free, non-rotting, warp and splitting resistant decks and docks. FRP structures do not suffer from the structural and thermal limitations that recycled plastic lumber and PVC experience. The decking surface will incorporate a skid-resistant surface using either pultruded material or honeycomb-sandwich flooring panels. Portions or entire assemblies of the invention will be manufactured as modular units, which can be easily transported to the worksite for final assembly/installation. Hollow sections in the FRP pultruded shapes will be used to conceal electrical wiring for power and lighting fixtures. The intent of this application is to describe these types of structures and their components. The intent of the application is not to limit it to only these structures, but it can be extended to other structures such as gazebos, decks for hot tubs and spas, pavilions, and enclosed patios, pool enclosures, and property (yard) enclosures where the structure can be screened-in.