Guide to the use of EN 1991-1-4 Wind Actions

The aim is to review the provision of EN1991-1-4 in comparison with current UK practice and to summarise the major differences. EN1991-1-4 must be used in the UK in conjunction with the UK National Annex. The National Annex gives alternative procedures known as National Determined Parameters (NDPs) for many clauses in EN1991-1-4; this report includes a commentary on the rationale for the choice of these NDPs. The scope of this report is limited mainly to static building structures for which BS6399-2 is the corresponding UK standard. Bridges are excluded and dynamic response of structures has been limited to a brief overview.