Despite the misleading name, there is no physical marking of the steels required.
What is now legally required is that companies fabricating steelwork for houses and apartments must have a certificate showing their compliance with the requirements of a Factory Production Control procedure.
This is to demonstrate that there is a system to show the raw materials have the necessary approvals and that there is a method for traceability of this information.
Furthermore, any welding must be carried out by approved welders and on calibrated approved machinery to ensure that the work is produced to the required parameters.
These are requirements for any work to Execution Class 2 which is now the class required for any dwelling with human occupation.
Cotswold Steel Stockholders have been approved to this standard by the British Board of Agrement which ensures peace of mind for their clients and compliance with the requirements of building control.