DS/EN 1998-4:2006

(1) The scope of Eurocode 8 is defined in EN 1998-1: 2004, 1.1.1 and the scope of this
Standard is defined in this clause. Additional parts of Eurocode 8 are indicated in EN 1998-1:
2004, 1.1.3.
(2) This standard specifies principles and application rules for the seismic design of the
structural aspects of facilities composed of above-ground and buried pipeline systems and of
storage tanks of different types and uses, as well as for independent items, such as for
example single water towers serving a specific purpose or groups of silos enclosing granular
materials, etc.
(3) This standard includes the additional criteria and rules required for the seismic design
of these structures without restrictions on their size, structural types and other functional
characteristics. For some types of tanks and silos, it also provides detailed methods of
assessment and verification rules.
(4) This standard may not be complete for those facilities associated with large risks to the
population or the environment, for which additional requirements are the responsibility of the
competent authorities. This standard is also not complete for those construction works which
have uncommon structural elements and which require special measures to be taken and
special studies to be performed to ensure earthquake protection. In those two cases the present
standard gives general principles but not detailed application rules.