Okla. Admin. Code § 748:20-6-28
Chapter 23 of the IRC® 2018 is adopted with the following modification: Section M2301.2.2.1 Roof-mounted collectors. This section has been modified to add a requirement for a mechanical means of disconnect to be installed on piping to allow for the disconnecting and removal of collectors to service or replace the roof. This section has been modified to read: M2301.2.21 Roof-mounted collectors. The roof shall be constructed to support the loads imposed by roof-mounted solar collectors. Roof-mounted solar collectors that serve as a roof covering shall conform to the requirements for roof coverings in Chapter 9 of this code. Where mounted on or above the roof coverings, the collectors and supporting structure shall be constructed on noncombustible materials or fire-retardant-treated wood equivalent to that required for roof construction. A mechanical means of disconnect shall be installed on piping to allow the disconnecting and removal of collectors for service or replacement of the roof.
Okla. Admin. Code § 748:20-6-28