International Standard
ISO 657-1:2026
Hot-rolled steel sections — Dimensions, sectional properties and tolerances — Part 1: Angles, sloping flange channels and sloping flange beams
Reference number
ISO 657-1:2026
Edition 2
2026-04
© ISO 2026
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Published (Edition 2, 2026)

ISO 657-1:2026

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Format
CHF 135
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Abstract

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.

General information

  • Status
     : Published
    Publication date
     : 2026-04
    Stage
    : International Standard published [60.60]
  • Edition
     : 2
    Number of pages
     : 24
  • Technical Committee :
    ISO/TC 17/SC 3
    ICS :
    77.140.70 
  • RSS updates

Life cycle

Sustainable Development Goals

This standard contributes to the following Sustainable Development Goals

9
Industry, Innovation and Infrastructure
12
Responsible Consumption and Production

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  4. ICS
  5. 77
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  7. 77.140.70
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