The provisions of this chapter shall control the alteration, repair, addition, maintenance and operation and change of occupancy of existing buildings and structures. Relocated existing buildings shall comply with Chapters 4 and 10. Existing building sites shall comply with Chapter 11.
Previously commissioned buildings and parts thereof, shall be operated and maintained in conformance to the code edition applicable at the time of construction. The owner shall be responsible for the operation and maintenance of existing buildings. The requirements of this chapter shall not provide the basis for removal or abrogation of fire protection and safety systems and devices in existing structures.
Alterations, repairs, additions and changes of occupancy to existing structures shall comply with the provisions of this chapter. Where such permitted work other than a change of occupancy is undertaken, compliance with Sections 1001.3.1, 1001.3.2 and 1001.3.3 shall be required.
1.Where the application of the requirements of Sections 1001.3.1, 1001.3.2 and 1001.3.3 to the unaltered spaces are determined by the code official to be infeasible based upon the existing configuration of spaces.
2.Materials, assemblies and components regulated by Sections 1001.3.1, 1001.3.2 and 1001.3.3 that are dependent upon properties of other concealed materials, assemblies or system components to function properly and where the properties of the concealed materials, assemblies or components are unknown or insufficient and will not be revealed during construction.
3. Where a tenant in a multi-tenant building does not have control within that tenant space of a complete system or item, compliance for that complete system or item shall not be required.
Heating, ventilating and air-conditioning systems and equipment shall be in accordance with the following:
1.Nonfunctioning thermostats shall be repaired or replaced.
2.Leaking accessible supply air and return ducts shall be sealed in accordance with Section 606.3 with approved sealants. Although the presence of existing duct tape shall not be deemed to indicate noncompliance where a duct is not leaking, duct tape shall not be acceptable for repair of such a leak.
3.Outside air dampers, damper controls and linkages controlled by HVAC units shall be in good repair and adjustment.
4.Hot water and steam leaks, defective steam traps and radiator control, relief, and vent valves in accessible piping shall not be permitted in any accessible piping.
5.Leaking accessible chilled water lines and equipment shall be repaired or replaced.
6.The programming of the building management systems (BMS) shall be tested and verified to confirm that schedules, alarms, lockouts and other performance algorithms operate as intended for the building.
7.Furnace combustion units shall have been cleaned and tuned within one year prior to the alteration. Filters shall be replaced in accordance with the furnace manufacturer’s recommendations.
8.Chiller systems shall have been cleaned and tuned within one year prior to the alteration.
9.For motor-driven systems and equipment, filters shall be cleaned or replaced, and belts and other coupling systems shall be repaired.
Defective hot and cold water piping and equipment within service water systems shall be repaired or replaced as follows:
1.The water supply shall meet the minimum flow and temperature requirements of the International Plumbing Code or the code in force at the time the building was constructed.
2.Leaking pipes, valves and equipment shall be repaired or replaced.
Leaking equipment in compressed air or pumped water systems shall be repaired or replaced.
Materials, assemblies, configurations and systems already in use that conform to requirements or approvals in effect at the time of their erection or installation shall be permitted to remain in use unless determined by the code official to be dangerous to the environment, life, health or safety. Where such conditions are determined to be dangerous to the environment, life, health or safety, they shall be mitigated or made safe.