19
Non-metallic building materials, namely, fly ash, composite panels composed primarily of non-metallic materials; concrete building materials in the form of blocks, bricks, posts, slates and panels; light weight aggregate building materials composed of fly ash, cement, sand, stones and gravel
37
Consulting services relating to the building and construction services; information services relating to the installation of building materials; technical consulting regarding building materials
42
Civil engineering services relating to land; scientific and research services and design services regarding building materials; industrial analysis and research services in the field of building materials; technology consultation services, namely, provision of technical advice relating to building technology and the technology of manufacturing building materials; information services relating to building technology and the technology of manufacturing building materials; technical support services, namely, provision of technical engineering advice relating to building materials