(A) The provisions of this title are not intended to prevent the use of any material or method of construction not specifically prescribed by this title, provided any such nonprescribed alternate has been approved by the Agency. The Agency may approve any such alternate if it finds that the proposed design conforms to the intent of this title and that the proposed material or method is, for the purpose intended, at least equivalent to materials and methods prescribed by this title as to quality, strength, effectiveness, fire resistance, durability and safety.
(B) The Agency shall require that sufficient evidence or proof be submitted to substantiate any claims as to alternate materials or methods as to their use. If there is insufficient evidence that the proposed alternate methods and materials comply with the intent of this title or evidence that any material or method of construction does not conform to the requirements of this title, the Agency may require tests to be made at the expense of the applicant by an organization approved by the Agency to establish compliance. The Agency shall determine the test methods and procedures. Copies of the results of all such tests shall be retained by the Agency for not less than two years after approval of the materials or methods.
(`78 Code, § 14.04.060.)