Concrete building materials in the nature of frame structures made of concrete, namely, concrete pile caps, concrete shear walls, concrete columns, concrete drop beams, concrete drop heads, and concrete slabs that form part of a concrete structure; Non-metal building materials, namely, frame structures made of concrete, namely, concrete pile caps, concrete shear walls, concrete columns, concrete drop beams, concrete drop heads, and concrete slabs that form part of a concrete structure

Portable fabric covered buildings made substantially of metal