ISO 21725-2:2021 PDF Download

ISO 21725-2:2021 "Simplified Design of Prestressed Concrete Bridges - Part 2: Box-Girder Bridges" focuses on providing guidelines for the design of prestressed concrete box-girder bridges used in road systems. It is important to note that the standard adheres to certain limitations set out in section 6.1. The document presents simplified design rules that serve as a condensed version of more detailed requirements. Specifically, the provisions outlined in ISO 21725-2:2021 primarily apply to the full staging method (FSM) of erecting box-girder bridges.

The standard emphasizes the structural integrity of new road bridges by taking into account factors such as continuity, redundancy, and alternate paths within the design. It emphasizes the need for structural members and bearing seat widths that are resistant to damage or instability. Furthermore, the document stresses the importance of implementing external protection systems to mitigate the effects of severe loads that are reasonably anticipated.