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Articles need to know!!! #exposurerating
3.1.7.3. Exposure Conditions for Rating
1) Floor, roof and ceiling assemblies shall be rated for exposure to fire on the underside.
2) Firewalls and interior vertical fire separation shall be rated for exposure to fire on each side.
3) Exterior walls shall be rated for exposure to fire from inside the building.
Articles need to know!!! #combustiblecomponents
3.1.5.6. Combustible Components in Exterior Walls
1) Combustible components, other than those permitted by Article 3.1.5.5., are permitted to be used in an exterior wall assembly of a building required to be of noncombustible construction, provided
a) the building is
i) not more than 3 storeys in building height, or
ii) sprinklered throughout, and
b) the wall assembly
i) meets the requirements of Clause 3.1.5.5.(1)(b), or
ii) is protected by masonry or concrete cladding not less than 25 mm thick.
Design Key:
1. Combustible components in exterior walls are permitted for a sprinklered noncombustible construction building with masonry or concrete cladding.
2. Combustible components in exterior walls are permitted for a building not more than 3 storeys with masonry or concrete cladding.
This sentence is very helpful if you are struggling for meeting the spatial calculation requirements of noncombustible construction.
Articles need to know!!! #exteriorcladding
3.1.4.8. Exterior Cladding
1) Not less than 90% of the exterior cladding on exterior walls of buildings conforming to Article 3.2.2.50. or 3.2.2.58. shall consist of
a) noncombustible cladding, or
b) a wall assembly that satisfies the criteria of Clause 3.1.5.5.(1)(b)
Articles need to know!!! #firewall
3.1.10.7. Combustible Projections
1) combustible material shall not extend across the end of a firewall but it is permitted to extend across a roof above a firewall that is terminated in conformance with Sentence 3.1.10.3.(2).
2) If buildings are separated by a firewall, combustible projections on the exterior of one building, including balconies, platforms, canopies, eave projections and stairs, that extend outward beyond the end of the firewall, shall not be permitted within 2.4 m of combustible projections and window or door openings of the adjacent building.