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MECHANICAL GENERAL CONDITIONS Section 15010 15-1207 3.05 FORMING, CUTTING AND PATCHING: A. Coordinate with other contractors as necessary to provide any special forming, recesses, chases, etc., and provide wood blocking, backing, and grounds as necessary for proper installation of mechanical work. B. If this Contractor fails to coordinate with other contractors at proper time or fails to locate items properly, resulting in extra work, then this Contractor is responsible. C. This Contractor is responsible for proper placement of pipe sleeves, hangers, inserts, and supports for work. D. Cutting, patching, and repairing of existing (old) construction to permit installation of piping, etc. is responsibility of this Contractor. Repair or replace damage to existing work with skilled mechanics for each trade involved in first-class manner. E. Core openings through existing construction as required for the passage of new piping and conduits. Cut holes of the minimum diameter to suit size of pipe installed and associated insulation. 3.06 DEMOLITION AND SALVAGE: A. Provide demolition of mechanical work under this SECTION as indicated on Drawings. B. Removed materials which will not be re -used and which are not claimed by the owner shall become the property of the Contractor and shall be removed from the premises. Consult Owner before removing any material from the premises. Carefully remove materials claimed by the owner to prevent damage. Coordinated delivery of such items to owner. C. Removed materials which are to be reused are to be removed, cleaned, and stored in a safe location. If such items are lost or damaged by the Contractor, item shall be replaced with new item at no added cost to owner. If item is found to be damaged prior to removal, inform Architect prior to removal so that item may be examined by Architect and owner for further instructions. 3.07 WELDING FOR MECHANICAL WORK: A. All mechanical welding and inspection requirement shall be in accordance with the California Mechanical Code. B. Qualify welding procedures, welders and operators shall be in accordance with ASME boiler and pressure vessel code, section IX, welding and brazing qualifications. Welding procedures and testing shall comply with ANSI standard B31.9 - standard code for pressure piping, and the American Welding Society (AWS) welding handbook. C. Soldering and brazing procedures shall conform to ANSI B9.1 standard safety code and NFPA 99. D. All welders shall be certified by a state approved welding bureau. Fabricator shall have current and valid certificated registration by the building official for the types of welds 9