37 Commercial building construction; Construction of civil engineering structures; Construction of civil engineering structures by forming concrete; Construction of civil engineering structures by laying concrete; Construction of civil engineering structures by pouring concrete; Construction of civil engineering structures using concrete; Construction of commercial buildings; Construction services, namely, planning, laying out and construction of residential and commercial communities; Construction services, namely, planning, laying out and custom construction of residential and commercial communities; Construction services, namely, planning, laying out and custom construction of commercial buildings; Building construction for civil infrastructure projects; Residential and commercial building construction