Part B1 Structural provisions

The magnitude of individual actions must be determined in accordance with the following:

1. Permanent actions:
   1. the design or known dimensions of the building or structure; and
   2. the unit weight of the construction; and
   3. AS/NZS 1170.1; and
   4. for a Class 7b building, a notional additional permanent roof load of not less than 0.15 kPa to support the addition of solar photovoltaic panels.
2. Imposed actions:
   1. the known loads that will be imposed during the occupation or use of the building or structure; and
   2. construction activity actions; and
   3. AS/NZS 1170.1.
3. Wind, snow and ice and earthquake actions:
   1. the applicable annual probability of design event for safety, determined by—
      1. assigning the building or structure an Importance Level in accordance with Table B1D3a; and
      2. determining the corresponding annual probability of exceedance in accordance with WA Table B1D3b; and
   2. AS/NZS 1170.2, except where varied by WA Part B2; and
   3. AS/NZS 1170.3 as appropriate; and
   4. AS 1170.4; and
   5. in cyclonic areas, metal roof cladding, its connections and immediate supporting members must comply with Specification 4; and
   6. for the purposes of (v), cyclonic areas are those determined as being located in wind regions B2, C and D in accordance with AS/NZS 1170.2, except where varied by WA Part B2.
4. Actions not covered in (a), (b) and (c) above:
   1. the nature of the action; and
   2. the nature of the building or structure; and
   3. the Importance Level of the building or structure determined in accordance with Table B1D3a; and
   4. AS/NZS 1170.1.
5. For the purposes of (d) the actions include but are not limited to—
   1. liquid pressure action; and
   2. ground water action; and
   3. rainwater action (including ponding action); and
   4. earth pressure action; and
   5. differential movement; and
   6. time dependent effects (including creep and shrinkage); and
   7. thermal effects; and
   8. ground movement caused by—
      1. swelling, shrinkage or freezing of the subsoil; and
      2. landslip or subsidence; and
      3. siteworks associated with the building or structure; and
   9. construction activity actions.

The structural resistance of materials and forms of construction must be determined in accordance with the following, as appropriate:

1. Masonry (including masonry-veneer, unreinforced masonry and reinforced masonry): AS 3700, except—
   1. ‘(for piers—isolated or engaged)’ is removed from Clause 8.5.1(d); and
   2. where Clause 8.5.1 requires design as for unreinforced masonry in accordance with Section 7, the member must also be designed as unreinforced masonry in accordance with Tables 10.3 and 4.1(a)(i)(C) of AS 3700.
2. Concrete:
   1. Concrete construction (including reinforced and prestressed concrete): AS 3600.
   2. Autoclaved aerated concrete: AS 5146.1.
   3. Post-installed and cast-in fastenings: AS 5216.
3. Steel construction:
   1. Steel structures: AS 4100.
   2. Cold-formed steel structures: AS/NZS 4600.
   3. Residential and low-rise steel framing: NASH Standard – Residential and Low-Rise Steel Framing Part 1 or Part 2.
4. Composite steel and concrete: AS/NZS 2327.
5. Aluminium construction: AS/NZS 1664.1 or AS/NZS 1664.2.
6. Timber construction:
   1. Design of timber structures: AS 1720.1.
   2. Timber structures: AS 1684.2, AS 1684.3 or AS 1684.4.
   3. Nailplated timber roof trusses: AS 1720.5.
7. Piling: AS 2159.
8. Glazed assemblies:
   1. The following glazed assemblies in an external wall must comply with AS 2047:
      1. Windows excluding those listed in (ii).
      2. Sliding and swinging glazed doors with a frame, including french and bi-fold doors with a frame.
      3. Adjustable louvres.
      4. Shopfronts.
      5. Window walls with one piece framing.
   2. All glazed assemblies not covered by (i) and the following glazed assemblies must comply with AS 1288:
      1. All glazed assemblies not in an external wall.
      2. Revolving doors.
      3. Fixed louvres.
      4. Skylights, roof lights and windows in other than the vertical plane.
      5. Sliding and swinging doors without a frame.
      6. Windows constructed on site and architectural one-off windows, which are not design tested in accordance with AS 2047.
      7. Second-hand windows, re-used windows and recycled windows.
      8. Heritage windows.
      9. Glazing used in balustrades and sloping overhead glazing.
9. Termite Risk Management: Where a primary building element is subject to attack by subterranean termites: AS 3660.1, and—
   1. for the purposes of this provision, a primary building element consisting entirely of, or a combination of, any of the following materials is considered not subject to termite attack:
      1. Steel, aluminium or other metals.
      2. Concrete.
      3. Masonry.
      4. Fibre-reinforced cement.
      5. Timber — naturally termite resistant in accordance with Appendix C of AS 3660.1.
      6. Timber — preservative treated in accordance with Appendix D of AS 3660.1; and
   2. a durable notice must be permanently fixed to the building in a prominent location, such as a meter box or the like, indicating—
      1. the termite management system used; and
      2. the date of installation of the system; and
      3. where a chemical is used, its life expectancy as listed on the appropriate authority's pesticides register label; and
      4. the installer’s or manufacturer’s recommendations for the scope and frequency of future inspections for termite activity.
10. Roof construction (except in cyclonic areas):
    1. Terracotta, fibre-cement and timber slates and shingles: AS 4597.
    2. Roof tiling: AS 2050.
    3. Cellulose cement corrugated sheets: AS/NZS 2908.1 with safety mesh installed in accordance with AS 1562.3 clause 2.4.3.2 except for sub-clause (c)(vii) for plastic sheeting.
    4. Metal roofing: AS 1562.1.
11. Particleboard structural flooring: AS 1860.2.
12. Garage doors and other large access doors in openings not more than 3 m in height in external walls of buildings determined as being located in wind region B2, C or D in accordance with AS/NZS 1170.2: AS/NZS 4505.
13. Lift shafts which are not required to have an FRL, must—
    1. except as required by (ii), be completely enclosed with non-perforated material between the bottom of the pit and the ceiling of the lift shaft, other than—
       1. at landing doors, emergency doors and pit access doors; and
       2. low-rise, low-speed constant pressure lifts; and
       3. small-sized, low-speed automatic lifts; and
    2. in atriums and observation areas, be protected with non-perforated material not less than 2.5 m in height—
       1. above any places on which a person can stand, which are within 800 mm horizontal reach of any vertical moving lift component including ropes and counterweights; and
       2. at the lowest level of the atrium area that the lift serves, on all sides except the door opening, for not less than 2.5 m in height, by enclosure with non-perforated material; and
    3. be of non-brittle material; and
    4. where glazing is used—
       1. comply with Table B1D4; or
       2. not fail the deflection criteria required by S6C11(c)(iii).

          Application	Lift shaft vision panels more than 65 000 mm2, door panels, and lift shafts	Lift shaft vision panels less than or equal to 65 000 mm2
          Laminated glass	10 mm (0.76 mm interlayer)	6 mm (0.76 mm interlayer)
          Toughened/ laminated glass	10 mm (0.76 mm interlayer)	6 mm (0.76 mm interlayer)
          Annealed glass with security polyester film coating	10 mm	6 mm
          Safety wire glass	Not applicable	Subject to fire test
          Polycarbonate sheet	13 mm	6 mm