05 Metals
05.03.00 Conservation Treatment for Period Metals
05.03.12 Conservation Treatment for Period Structural Steel 05.03.12.13 Conservation Treatment for Period Architecturally Exposed Steel 05.03.12.23 Conservation Treatment for Period Structural Steel for Buildings 05.03.51 Conservation Treatment for Period Metal Stairs 05.03.58 Conservation Treatment for Period Column Covers 05.03.70 Conservation Treatment for Period Decorative Metal 05.03.71 Conservation Treatment for Period Decorative Metal Stairs 05.03.73 Conservation Treatment for Period Decorative Metal Railings 05.03.75 Conservation Treatment for Period Decorative Formed Metal 05.03.76 Conservation Treatment for Period Decorative Forged Metal