Detta beror bl.a. på att reglerna inte respekteras ute på arbetsplatserna, men kanske också på att det saknas exakta anvisningar för hur sådana olyckshändelser kan undvikas. ###>That is partly due to the fact that the rules are not kept on work sites, but it is perhaps also due to the fact that there is a lack of more precise instructions as to how such accidents are to be prevented.