AS NZS 2179.1:2014 – Specifications for rainwater goods,accessories and fasteners Part 1: Metal shape or sheet rainwatergoods, and metal accessories and fasteners
AS NZS 2179.1:2014 – Specifications for rainwater goods,accessories and fasteners Part 1: Metal shape or sheet rainwatergoods, and metal accessories and fasteners.
Aluminium/zinc alloy-coated steel used for accessories shall comply with Clause 2.3.2.
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
The temper of copper and copper alloys shall be appropriate to, and most practicable for, the necessary forming operations.
2.4.2 Rainwater goods
Copper and copper alloys used for rainwater goods shall comply with AS 1 566.
Copper and copper alloys used for accessories shall comply with AS 1566.
Fasteners for rainwater goods and accessories of copper and copper alloys shall comply
with AS/NZS 1567 or AS/NZS 1573.
2.5 ZINC-COATED STEEL
Rainwater goods of zinc-coated steel may be plain, prepainted or laminated organic coated.
2.5.2 Rainwater goods
Zinc-coated steel used for rainwater goods shall comply with materials specified in AS 1397 with a minimum coating of Class Z275. Prepainted and laminated organic-coated materials shall also comply with AS/NZS 2728.
Zinc-coated steel used for accessories shall comply with Clause 2.5.2.
Materials for the manufacture of fasteners for rainwater goods and accessories of zinccoated steel shall be in accordance with Clause 2.3.4.
One or more of the tests set out in Appendices A, B and C shall be used to demonstrate the compliance of a gutter or downpipe and support system with the appropriate provisions specified in Section 3.
The apparatus for each performance test shall comply with Appendices A, B or C, whichever is applicable.
4.3 VERTICAL LOAD
When tested in accordance with Appendix A, the test specimen of a gutter or graded downpipe and its support system shall comply with the following:
(a) The strength limit state shall sustain the test load for 5.0 +1, —O mm, irrespective of any permanent deformation.
(b) The serviceability limit state shall sustain the test load for 5.0 ±1, —0 mm, with a maximum deflection not greater than one hundredth of the distance between the centre-lines of adjacent supports of’ the support system (I), in millimetres.
5.0 +1, —0 mm after removal of the test load, the serviceability limit state shall have—
(i) a residual deflection not greater than 0.00 lI and
(ii) no permanent local deformation, fracture or other failure.
1 Limits on residual deflection have been included to preserve the appearance of rainwater goods and to minimize ponding. Residual deflection may be difficult, however, to determine reliably because of frictional effects and the like. Techniques performed to improve the reliability of the measurement, such as light tapping of the test specimen, are permissible provided it can be demonstrated that such techniques serve oniy to settle it to its rest position.
2 The location of maximum deflection may not necessarily coincide with the position of maximum deformation. Consideration should be given to the application of the concentrated load directly over a support or mid-span.
4.4 HORIZONTAL LOAD
When tested in accordance with Appendix B, the test specimen of an eaves gutter or graded downpipe and its support system shall have—
(a) deflections not greater than given in Table 4. 1; and
(b) no permanent local deformation, fracture or other failure.