9.10.3.

(1) Where a fire-resistance rating or a fire-protection rating is required in this Section for an element of a building, such rating shall be determined in conformance with the test methods described in Part 3, or in accordance with Supplementary Standard SB-2.

(1) Where a flame-spread rating is required in this Section for an element of a building, such rating shall be determined in accordance with the test methods described in Part 3, or in accordance with Supplementary Standard SB-2.

(2) Unless the flame-spread rating is referred to in this Part as a “surface flame-spread rating”, it shall apply to any surface of the element being considered that would be exposed by cutting through it as well as to the exposed surface of the element.

(1) Floor, roof and ceiling assemblies shall be rated for exposure to fire on the underside.

(2) Exterior walls shall be rated for exposure to fire from inside the building, except that such walls need not comply with the temperature rise limitations required by the standard tests referred to in Article 9.10.3.1.v1 if such walls have a limiting distance of not less than 1 200 mm, and due allowance is made for the effects of heat radiation in accordance with the requirements in Part 3.

(3) Firewalls and interior vertical fire separations required to have fire-resistance ratings shall be rated for exposure to fire on each side.

(1) Where a ceiling construction has a suspended membrane ceiling with lay-in panels or tiles that contribute to the required fire-resistance rating, hold down clips or other means shall be provided to prevent the lifting of such panels or tiles in the event of a fire.