ISO 657-1

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

General information

Current stage: 60.00 Effective date: Apr 4, 2026

Originator: ISO

Owner: ISO/TC 17/SC 3

Type: International Standard

Scope

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

equal angle LE (L section);
unequal angle LU (L section);
sloping flange channel US (U section);
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.

Life cycle

PREVIOUSLY

PUBLISHED
ISO 657-1:1989

PUBLISHED
ISO 657-2:1989

PUBLISHED
ISO 657-5:1976

PUBLISHED
ISO 657-11:1980

PUBLISHED
ISO 657-15:1980

NOW

PROJECT
ISO 657-1
60.00 Standard under publication
Apr 4, 2026