BS EN 1993-1-1:2005+A1:2014
Following publication of the EN, there is a period allowed for national calibration during which the National Annex is issued, followed by a coexistence period of a maximum 3 years. During the coexistence period Member States are encouraged to adapt their national provisions. Conflicting national standards will be withdrawn by March 2010 at the latest. BS EN 1993-1-1 will partially supersede BS 449-2, BS 5400-3 and BS 5950-1, which will be withdrawn by March 2010.