This Standard is one of a series of Standards on plastic roof and wall cladding materials which, when complete, will comprise:

AS/NZS
4256 Plastic roof and wall cladding materials
4256.1 Part 1:General requirements
4256.2 Part 2:Unplasticized polyvinyl chloride (uPVC) building sheets
4256.3 Part 3:Glassfibre reinforced polyester (GRP)
4256.4 Part 4:Unplasticized polyvinyl chloride (uPVC) wall cladding and boards
4256.5 Part 5:Polycarbonate (this Standard)

These Standards are to be used in conjunction with the series of test methods for plastic
building sheets which, when complete, will comprise:

AS/NZS
4257 Plastic roof and wall cladding materials — Methods of test
4257.0 Part 0:General introduction and list of methods
4257.1 Method 1: Determination of dimensional properties
4257.2 Method 2: Determination of dimensional stability at 60°C
4257.3 Method 3: Determination of mass per unit area of sheet
4257.4 Method 4: Determination of diffuse light transmission
4257.5 Method 5: Determination of glass-fibre content
4257.6 Method 6: Determination of impact resistance
4257.7 Method 7: Determination of colour fastness, light transmission and impact resistance following ultraviolet light exposure
4257.8 Method 8: Determination of residual styrene
4257.9 Method 9: Determination of bending strength and modulus of elasticity

In New Zealand technical requirements for building construction are contained in the New Zealand Building Code and the Building Regulations. The following Code clauses are, or may be, relevant in respect to plastic building sheets: B1 Structure, B2 Durability, C3 Spread of Fire, E2 External Moisture, E3 Internal Moisture, F2 Hazardous Buildings Materials, G7 Natural Light, H1 Energy Efficiency.

The term ‘informative’ has been used in this Standard to define the application of the appendix to which it applies. An ‘informative’ appendix is only for information and guidance.