[OSHPD 1, 2, 3 & 4]
Ducts which penetrate construction, intended for X-ray
or other radiation protection, shall not impair the effectiveness
of the protection.
Duct linings and their use shall meet the requirements
of Chapter 6, California Mechanical Code.
Cold air ducts shall be insulated
wherever necessary or to prevent condensation.
The anchorage and supporting structural elements for
airducts shall be designed to withstand the lateral forces as
required by the California Building Code, Title 24, Part 2.