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ISO 657-1:2026

Hot-rolled steel sections - Dimensions, sectional properties and tolerances - Part 1: Angles, sloping flange channels and sloping flange beams
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ISO 657-1:2026

Hot-rolled steel sections - Dimensions, sectional properties and tolerances - Part 1: Angles, sloping flange channels and sloping flange beams

PUBLISH DATE 2026
ISO 657-1:2026

This document specifies requirements for dimensions, sectional properties and tolerances for hot-rolled sections as follows:

  1. equal angle LE (L section);
  2. unequal angle LU (L section);
  3. sloping flange channel US (U section);
  4. sloping flange I beam IS(I section).

This document is used together with technical delivery conditions especially, but is not limited, ISO 630-1, ISO 630-2, ISO 630-3, ISO 630-5 and ISO 630-6.

SDO ISO: International Organization for Standardization
Document Number ISO 657
Publication Date April 1, 2026
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO/TC 17/SC 3
Publish Date Document Id Type View
April 1, 2026 ISO 657-1:2026 Revision
Aug. 1, 1989 ISO 657-1:1989 Revision