beams made of wood; beams, not of metal; non-metallic nail plates for the assembly of roof trusses; hips for roofing; non-metallic composite materials for use in roofing; non-metallic building materials for roofs; non-metallic materials for use in making roofs; non-metallic ready mountable parts for roof constructions; non-metallic roof components for buildings; non-metallic girders being parts of walls; non-metallic materials for use in the construction of walls; studding being non-metallic framing for walls; modular structural units, not of metal, for the construction of prefabricated buildings; non-metallic structural frameworks for buildings; non-metallic structural sections for construction purposes; space frame structural units, not of metal; beams made of timber; structural timber products; construction elements of timber; timber building products; non-metallic blocks for construction; non-metallic roof trusses; non-metallic hips for roofing; non-metallic prefabricated roof units; non-metallic roofing boards; non-metallic roofing materials; non-metallic roofing plate; non-metallic prefabricated roof structures; non-metallic prefabricated wall structures; non-metallic structural building elements; non-metallic structural building members; non-metallic structural support members; non-metallic timber connectors; blocks made of non-metallic materials for building purposes; interior walls of non-metallic materials; non-metallic beams for building purposes; non-metallic building beams; non-metallic flooring; joists, not of metal