Non-metal casting forms for pouring concrete for foundations, ventilated crawl spaces and/or sub-floor hollow structures; non-metal forms for use in casting concrete; construction elements not made of metal, namely, supports; non-metal structural supports used to support a slab and floors; non-metal structural supports used to provide a shape and structural characteristics to slabs and floors; non-metal structural supports for slabs and floors; building materials, namely, plastic pipe support...