Proposed Construction

(1)Where an existing building system is materially altered or repaired, the performance level of the building after the material alteration or repair shall be at least equal to the performance level of the building prior to the material alteration or repair. (See Note A-11.3.1.1.(1))

(1)Except as provided in Article 11.3.3.1. and Section 11.5., the design and construction of a new building system or the extension of an existing building system, shall comply with all other Parts. (See Note A-11.3.1.2.(1))

(1)Where an existing building is extended,

• (a) this Part applies to the existing portion of the building, and
• (b) the extended portion of the building shall comply with all other Parts.

(1)Except as provided in Sentence (2) and Article 11.3.3.2., construction may be carried out to maintain the existing performance level of all or part of an existing building, by the reuse, relocation or extension of the same or similar materials or components, to retain the existing character, structural uniqueness, heritage value, or aesthetic appearance of all or part of the building, if the construction will not adversely affect the early warning and evacuation systems, fire separations or the structural adequacy or will not create an unhealthy environment in the building.

(2)Construction in respect of a Group B, Division 3 occupancy, a hotel or a retirement home may be carried out in accordance with Sentence (1) only if the construction will be in conformance with the Fire Code made under the Fire Protection and Prevention Act, 1997.

(1)Where existing interior walls or ceilings or floor assemblies or roof assemblies are substantially removed in an existing building and new interior walls, ceilings, floor assemblies or roof assemblies are installed in the building, structural and fire-resistance elements shall be constructed in compliance with the requirements of the other Parts.

(2)Except as provided in Section 11.5., the proposed construction within an existing suite shall comply with the requirements of Section 3.8. where,

• (a) new interior walls or floor assemblies are installed,
• (b) the suite has an area greater than 300 m2, and
• (c) the suite is located in, (i) a floor area where the existing difference in elevation between the adjacent ground level and the floor level is not more than 200 mm, or (ii) a normally occupied floor area which is accessible by a passenger type elevator or other platform equipped passenger elevating device from an entrance storey where the existing difference in elevation between the adjacent ground level and the entrance storey level is not more than 200 mm.

(3)Except as provided in Section 11.5., the proposed construction within an existing suite, other than a suite described in Sentence (2) or a suite in a building described in Clause 3.8.1.1.(1)(a), (b), (c) or (d), shall comply with the requirements of Sentences 3.8.1.3.(6), 3.8.2.3.(6), 3.8.3.1.(6), 3.8.3.3.(19), 3.8.3.7.(1), 3.8.3.15.(5) and 3.8.3.16.(4) where new interior walls or floor assemblies are installed. (See Note A-11.3.3.2.(3))

(4)Except as provided in Sentence (5), where existing interior walls or ceilings or floor assemblies or roof assemblies are substantially removed on any storey in an existing building and new interior walls, ceilings, floor assemblies or roof assemblies are installed, the storey shall be sprinklered if,

• (a) the storey will contain a Group C major occupancy, and
• (b) the building is over 3 storeys in building height.

(5)Sentence (4) does not apply where the building,

• (a) conforms to Subclause 3.2.2.50.(1)(a)(ii), and
• (b) contains dwelling units having means of egress conforming to Sentence 3.3.4.4.(8).

(6)Where existing interior walls or ceilings or floor assemblies or roof assemblies are substantially removed and new interior walls, ceilings, floor assemblies or roof assemblies are installed in an existing building or part of an existing building that is a retirement home, the following requirements apply:

• (a) the retirement home shall be sprinklered,
• (b) a voice communication system conforming to Article 3.2.4.23. shall be provided in the building, if Clause 3.2.6.8.(1)(b) or (c), as applicable, requires that such a voice communication system be provided in the building, and
• (c) doors to suites and sleeping rooms not within suites in the retirement home, other than doors leading directly to the exterior, shall be equipped with self-closing devices.

(1)Despite Subsections 11.3.1. to 11.3.3., when an existing building is extended or subject to material alteration or repair, Part 7 applies,

• (a) to the design and construction of plumbing in the extensions and those parts of the building subject to material alteration and repair, and
• (b) to plumbing which is adversely affected by the extension, alteration or repair.

(1)Despite Subsections 11.3.1. to 11.3.3., where an existing septic tank is subject to material alteration, repair or replacement, the construction of the septic tank shall comply with Part 8.

(1)Despite Subsections 11.3.1. to 11.3.3., where an existing sewage system is extended or is subject to material alteration or repair, the requirements respecting the vertical separation to the water table set out in Part 8 apply to the extended, altered or repaired portions of the sewage system as well as to the existing portions of the sewage system.