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This is still the most widely used and is generally acknowledged to be the more comprehensive. Because the PSA specification is performance-based, product conformity can be independently tested, which makes compliance clear and unambiguous.
This standard also gives definitive advice on which grade to use for specific applications, which is a far more user-friendly approach than the BSEN, which simply defines performance attributes.
The PSA comprises just four classifications - Light, Medium, Heavy and Extra Heavy and these 'cascade' in such a way that 'higher' specifications automatically comply with those below.
|Grade||Concentrated load over 25mm2||Concentrated load over 300mm2||Min Uniformly Distributed Load (UDL)|
|Loading||6 ultimate load classes = 4, 6, 8, 9, 10, 12 kN|
|Light||1.5 kN||2.70 kN||6.7 kN|
|Medium||3.0 kN||4.5 kN||8.0 kN|
|Heavy||4.5 kN||n/a||12.0 kN|
|Extra Heavy*||4.5 kN||n/a||12.0 kN|