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Free online calculation tools for structural design according to Eurocodes
You can provide the following project data as page header.
Eurocode 8 Design earthquake action during construction phase
Calculation of the reduced earthquake ground acceleration applicable during the construction phase of the structure as a function of the duration of the construction stage (applicable for any type of structure, not only bridges)
EN 1998-2:2005+A2:2011 Annex A
Supported National Annexes:
No Nationally Defined Parameters (NDPs) in the calculation