Structural Steel. General requirements relating a supply of structural steel shall conform to IS 8910. Requirements for mild steel (standard quality) plate, sections bars etc, designated as E250 (Fe 410-W) for use in structural work (as per IS:2062- 2006, superseding IS 1977, 8500). Structural steel such as angle section, T-sections, I-sections, Channels & steel plates shall be conforming to IS: 226. Structural steel used in the works other than steel in reinforced concrete, rails and fastenings shall be either of the following type: a. Mild steel conforming to IS : 226 - "Structural Steel (Standard quality)" or IS : 2062 - "Structural Steel (fusion welding quality) b. Whenever high tensile steel is specified it shall be conforming to IS: 961 - "Structural steel (High Tensile)". c. All steel tubes shall be hot finished seamless steel tubes (HFS) of the specified strength and shall conform to IS: 1161. Tubes made by other processes and which have been subjected to cold working, shall be regarded as hot finished if they have been subsequently been heat treated and are supplied in the normalized condition
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Sources: Concession Agreement, Concession Agreement