AS/NZS 2179.1:2014 pdf – Specifications for rainwater goods, accessories and fasteners Part 1: Metal shape or sheet rainwater goods, and metal accessories and fasteners.
2.1 GENERAL
Metal materials for the manufacture of rainwater goods, accessories and fasteners shall comply with the appropriate clauses of this Section. The minimum base metal thickness for rainwater goods and accessories shall comply with Section 3.
NOTE: For materials made from zinc/aluminium alloy-coated steel and zinc/aluminium/ magnesium alloy-coated steel, refer to AS 1397.
Where rainwater goods and accessories, manufactured from more than one material, are components of a system, then contact between such components shall comply with AS/NZS 3500.3, AS/NZS 3500.5 or NCC, Volume Two.
NOTE: Materials selected for rainwater goods should he compatible with those of the upstream roof covering and rainwater goods (see AS/NZS 3500.3 or NCC, Volume Two).
Fasteners, including retained mandrels, shall be durable, corrosion-resistant and compatible with any other material they may be in contact with or receive drainage from.
NOTE: See also AS/NZS 3500.3, AS/NZS 3500.5 or NCC, BCA Volume Two.
2.2 ALUMINIUM ALLOYS
2.2.1 General
Rainwater goods of aluminium alloy may be plain, embossed or clad with an
aluminium/zinc alloy, prepainted or anodized.
2.2.2 Rainwater goods
Aluminium alloys for the manufacture of rainwater goods shall be of the 1000, 3000, 5000 or 6000 series complying with AS/NZS 1734, AS/NZS 1866 or AS/NZS 1867, or 400 series complying with AS 1 874, as appropriate. The copper content of aluminium alloys shall not exceed 0.25%. Prepainted materials shall also comply with AS/NZS 2728.
2.2.3 Accessories
Aluminium alloys for the manufacture of accessories shall comply with Clause 2.2.2 if not used for castings, or AS 1 874 if used for castings.
2.2.4 Fasteners
Materials for the manufacture of fasteners for rainwater goods and accessories of
aluminium alloys shall be in accordance with the following:
(a) Aluminium alloys complying with Clause 2.2.2.
(b) Stainless steel complying with AS 2837—1986 and ASTM A167-99(2009) Grade 304, Grade 305 or Grade 316.
2.3 ALUMINIUM/ZINC ALLOY-COATED STEEL
2.3.1 General
Rainwater goods of aluminium/zinc alloy-coated steel may be plain or prepainted.
2.3.2 Rainwater goods
Aluminium/zinc alloy-coated steel for manufacture of rainwater goods shall comply with
AS 1 397 with a minimum coating of Class AZ 1 50. Prepainted materials shall comply with
AS/NZS 2728.
2.3.4 Fasteners
Materials for the manufacture of fasteners for rainwater goods and accessories of aluminium/zinc alloy-coated steel shall be in accordance with the following:
(a) Aluminium alloys shall comply with Clause 2.2.2.
(b) Aluminium/zinc alloy-coated steel shall comply with Clause 2.3.2 for sheet metal.
(c) Aluminium/zinc/magnesium alloy-coated steel shall comply with Clause 2.8.2 for sheet metal.
(d) Zinc-coated steel shall comply with—
(i) Clause 2.5.2 for sheet metal;
(ii) AS/NZS 4680 for hot-dip galvanized (zinc) coatings on fabricated ferrous articles;
(iii) AS 1789 for minimum zinc classification code of Fe/Zn 12; and
(iv) AS 1897 for service condition 3 (severe), with chromate conversion coating type C (iridescent).
(e) Self-drilling screws shall comply with AS 3566.1, with a minimum Class 3 coating.
2.4 COPPER AND COPPER ALLOYS
2.4.1 General
The temper of copper and copper alloys shall be appropriate to, and most practicable fo’ the necessary forming operations.
AS/NZS 2179.1:2014 pdf – Specifications for rainwater goods, accessories and fasteners Part 1: Metal shape or sheet rainwater goods, and metal accessories and fasteners
