BGeneral Building ContractorC-2Insulation and AcousticalC-6Cabinet, Millwork and Finish CarpentryC-9DrywallC10ElectricalC13FencingC15Flooring and Floor CoveringC17GlazingC28Lock and Security EquipmentC39RoofingC43Sheet MetalD03AwningsD12Synthetic ProductsD16Hardware, Locks and SafesD24Metal ProductsD28Doors, Gates and Activating DevicesD38Sand and Water BlastingD48D52Window Coverings