This blog provides insights into the key themes and points from CEN/TS 1090-201:2024, a technical specification that supplements EN 1090-2 with provisions for the reuse of recovered steel structural elements in steel structures.

This blog provides insights into the key themes and points from CEN/TS 1090-201:2024, a technical specification that supplements EN 1090-2 with provisions for the reuse of recovered steel structural elements in steel structures.

Key Points

• Scope: The specification applies to steel structures designed according to the EN 1993 series and executed in accordance with EN 1090-2, excluding cold-formed profiles and sheet materials as described in EN 1090-4, as well as mechanical fasteners.
• Reuse Assessment: Before reuse, the suitability of recovered structural elements must be determined based on prior usage information and a condition assessment.
• Origin: Critical information about the previous use of the component, such as the date and location of construction of the original building, drawings, inspection documents, and design load data.
• Condition Assessment: A visual inspection of all structural elements for global deformations, signs of exposure to high temperatures, and local damage.
• Quality Assessment: To determine or confirm relevant properties, a comprehensive quality assessment must be performed.
• Geometric Properties: The dimensions and tolerances of the cross-section of all components must be measured and documented.
• Heat Treatment: The heat treatment condition must be established for hollow profiles.
• Test Protocols: Depending on the available information and the outcome of the reuse assessment, four test protocols (A to D) are described:
• Protocol A: Documentation available (Type 1 construction steel with original inspection documents).
• Protocol B: Single destructive test (Type 1 construction steel with known origin).
• Protocol C: Statistically representative destructive test (Type 2 construction steel with known origin).
• Protocol D: Extensive destructive test (construction steel with unknown origin).
• Testing: Both non-destructive and destructive tests are described, including hardness tests, chemical composition analysis, tensile tests, and Charpy impact tests.
• Fabrication: The execution of steel structures using recovered structural elements must comply with the requirements of EN 1090-2, including preparation, welding, mechanical fastening, and surface treatment.

Key Quotations

• “The suitability of recovered structural elements for reuse must first be established based on prior usage information and condition assessment.” (Clause 5.1)
• “Structural elements that are excessively deformed must not be reused.” (Clause 5.2.2)
• “The relevant properties to be specified must comply with EN 1090-2:2018+A1:2024, Clause 5.1.” (Clause 5.3.1)
• “All destructive tests must be conducted by a laboratory independent of the production department and compliant with EN ISO/IEC 17025.” (Clause 6.2.1)

Recommendations

• Conduct a thorough reuse assessment, including gathering origin information and performing a visual inspection of the structural elements.
• Select the appropriate test protocol based on the available information and the results of the reuse assessment.
• Ensure all tests are carried out by qualified and independent laboratories.
• Document all steps of the reuse and quality assessment in an inspection and test report.

Conclusion

The CEN/TS 1090-201:2024 provides a framework for the safe and responsible reuse of recovered steel structural elements in new steel structures. By adhering to the specifications in this document, companies can reduce the environmental impact of their projects while ensuring the safety and sustainability of the built environment.

This technical specification is available at www.nen.nl. For assistance with interpretation, implementation, or discussions on welding techniques, our specialists are ready to help!

📞 0512 524 008
✉ info@weldmij.com
☕ Dukdalf 11, Drachten