Test Requirements
Uniformly distributed Load (UDL)
- Serviceability tests:
- Deflection under load, (span/120) + p/30 where p is the maximum distance between fasteners on the support structure. (Informative for roofing, Normative for cladding), or by
- Permanent deformation or cracking around fastener head, or de-indexing or de-clipping of clip fastened profiles. Serviceability failure of clip fastened products may occur when a clip disengages from the central rib, but weathertightness of the lap is not affected and roof can continue to resist increased loads.
- Strength tests.
Strength tests are defined as: sheet unable to resist further loads i.e. pull-off from clips, buckling, tearing or pull-through of fasteners.
Point Load
- Resistance to point load on the pan, or to two ribs of narrow profiles,at the weakest point.
- Residual deflection after imposition of serviceability load, and application of strength load
- Resistance to point load on a single rib at the weakest point.
- Residual deflection after imposition of serviceability load, and application of strength load
Load is applied in a downwards direction through a rubber faced pad. The weakest point is generally mid span at rib/pan adjacent to underlap.
Clause:
017_001_002_000_000_000_000_000_000
Clause Number:
17.1.2
/cop/testing-and-mrm-standards/metal-cladding-testing#test-requirements
Revision Category:
4 - Clause Inserted
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