The Chief Building Official may inspect or cause to be inspected at the point of the manufacture or fabrication, all materials and assemblies which this Building Code, or rules and regulations promulgated thereunder, requires to be inspected at such points. Plant inspection will not be requested:
(A) Where materials, assemblies, service equipment, and accessories are accessible for inspection at the job site.
(B) Where licensed professional engineers, architects (registered in Ohio), or others as approved, inspect and furnish a report of inspection to the Chief Building Official that the material, assembly, service equipment, and accessories are in compliance with this Building Code.
(C) Where materials, assemblies, service equipment and accessories are designed and manufactured under the supervision of the licensed professional engineer or architect (registered in Ohio) and are in conformance with this Building Code, the licensed professional engineer or architect shall furnish in writing a certification that the assembly in question has been inspected and meets all the requirements of this Building Code if so requested by the Chief Building Official.
(‘74 Code, § 150.41)