Buildings made of metallic structures;; Metallic engineering structures; Building extensions (structures) of metal;; Building structures of metal;; Buildings consisting of fixed and portable metal structures;; Building framework structures of metal;; Metallic roof and wall structures.

Building extensions (structures) of non-metallic materials; Buildings made of non-metallic structures;; Non-metallic engineering structures;; Buildings consisting of fixed and portable non-metallic structures;; Building framework structures of non-metallic material;; Non-metallic roof and wall structures; Building structures of non-metallic material