PD ISO/TR 25439:2025 PDF

1 Scope This document provides design examples of concrete-filled steel tubular (CFST) hybrid structures in accordance with ISO 16521 . This document includes the design calculation of major structural types in ISO 16521 , i.e., trussed CFST hybrid structures, concrete-encased CFST hybrid structures. The design examples cover the major loading cases for the structures and follow the design procedure presented in ISO 16521:2024, Clause 6 .