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ČSN EN 1993-1-10 1) EN 1993-1-10 specifies rules for the selection of steel grades and qualities related to fracture tou-ghness to avoid brittle fracture. NOTE Steel quality is also known as (Charpy) subgrade. 2) EN 1993-1-10 specifies rules to specify through thickness properties for welded elements to reduce the risk of lamellar tearing. 3) EN 1993-1-10 specifies additional toughness requirements for specific cases to ensure upper shelf toughness in relation to design ultimate resistance in tension and seismic design. 4) EN 1993-1-10 specifies rules for structural steels as listed in EN 1993-1-1. This document applies to steel grades S235 to S700. 5) EN 1993-1-10 specifies rules that apply to the selection of parent material only. 6) EN 1993-1-10 specifies rules that apply to steel materials covered by EN 1993-1-1:2022, 5.1(3), provided that each individual piece of steel is tested in accordance with the requirements of EN 1993-1-1:2022, 5.2.1 and EN 1090-2:2018+A1:2024, 5.1. 7) This document does not apply to material salvaged from existing steelwork subjected to fatigue or fire. Assumptions: 1) Unless specifically stated, EN 1990, EN 1991 (all parts) and the other relevant parts of EN 1993-1 (all parts) apply. 2) The design methods given in EN 1993-1-10 are applicable if: - the execution quality is as specified in EN 1090-2 or EN 1090-4, and - the construction materials and products used are as specified in the relevant parts of EN 1993 (all parts), or in the relevant material and product specifications.