Scaffolds should be presumed to be 'basic purpose' (Optimum lots 2 kN/m2/200 kg/m2) unless notified or else by your scaffold company. http://vuagaobinhduong.com/index.php?language=vi&nv=statistics&nvvithemever=t&nv_redirect=aHR0cDovL2J1ZHRyYWRlci5jb20v