ONR CEN/TS 17440

This document provides additional or amended provisions to EN 1990 to cover the assessment of existing structures, and the retained parts of existing structures that are being modified, extended, strengthened or retrofitted. This document covers general principles regarding actions for assessment complementing EN 1991. This document includes general principles for the assessment of the structural resistance of existing structures. This document does not provide specific rules for initiation of assessment. This document does not provide specific rules on how to undertake interventions that can be carried out as a result of an assessment. This document does not cover the design of new elements that will be integrated into an existing structure. The general assumptions of CEN/TS 17440 are: • the assessment of the structure is made by appropriately qualified and experienced personnel; • adequate supervision and quality control is provided during the assessment process; • the structure will be used in accordance with the assessment assumptions; • the structure will be maintained in accordance with the assessment assumptions.