TG20 is based on the previous UK scaffold standard BS 5973. This was however withdrawn by the
BSI becauseit was neither consistent nor compatiblewith BS EN 12811-1. The support of the HSE
was therefore fundamental in appropriately defining a safe method ofworking for the future. It was
most important that a document was prepared to give guidance to scaffolders and users alike, in the
absence of BS 5973.
The principal differences between