EUROPEAN CTANDARD EN 10056-2

NORME EUROPÉENNE
EUROPAISCHE N O R M September 1993
~~

UDC 669.14.018.29-423.1 ~621.713.1

Descriptors: Iron and steel products, angle irons, structural steels, dimensional tolerances, form tolerances.

English version

Structural steel equal and unequal leg angles

Tolerances on shape and dimensions

Cornières à ailes égales et à ailes Gleichschenklige und ungleich-

inégales en acier de construction; schenklige Winkel aus Stahl;
tolérances de formes et de dimensions Grenzabmaße und Formtoleranzen

This European Standard was approved by CEN on 1993-08-30.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard
without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may
be obtained on application t o the Central Secretariat or t o any CEN member.
This European Standard exists in three official versions (English, French, German).
Aversion in any other language made by translation under the responsibility of a CEN
member into its own language and notified to the Central Secretariat has the same status
as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland,
France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
Portugal, Spain, Sweden, Switzerland and United Kingdom.

CEN
European Committee for Standardization
Comité Européen de Normalisation
Europäisches Komitee f ü r Normung

Central Secretariat: rue de Stassart 36, 8-1050 Brussels

O 1993. Copyright reserved to all CEN members. Ref. No. EN 10056-2:1993 E

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EN 10056-2:1993

Contents list

Page Page
Foreword ........................................ 2 5 Tolerance o n m a s s . . .......................... 2

1 Scope ........................................ 2
6 Tolerance on length ........................... 2
Table 1: Tolerances on dimensions, squareness and
2 Normative references . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
straightness of structural steel equal and
3 Definitions .................................... 2 unequal leg angles ....................... 3
4 Tolerances on shape and dimensions ............. 2 Annex A (informative) Straightness measurement . . . . 3

Foreword
This European Standard has been prepared by ECISS/TC 11 'Sections: Tolerances and dimensions', the Secretariat of which
is held by BSI.
The discussions within ECISS/TC 11 were based on
EURONORM 56-77 Hot rolled equal angles (with radiused root and toes)
and
EURONORM 57-78 Hot rolled unequal angles (with radiused root and toes)
This European Standard shall be given the status of a national standard, either by publication of an identical text or by en-
dorsement, and conflicting national standards withdrawn, by March 1994 at the latest.
In accordance with the CENKENELEC Internal Regulations, the following countries are bound to implement this European
Standard:
Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
Portugal, Spain, Sweden, Switzerland and the United Kingdom.

1 Scope For unequal leg angles, the longer leg length, a, shall be
used.
This Part of this European Standard specifies tolerances
on the shape, dimensions and mass of hot rolled structural
4.2 Section thickness ( t )
steel equal and unequal leg angles. The sizes of these
angles are given in EN 10056-1. These tolerances do not The nominal section thickness shall be within the toler-
apply t o stainless steel equal and unequal leg angles. ances given in table 1.

2 Normative references 4.3 Out-of-squareness (k)

This European Standard incorporates, b y dated or undated The out-of-squareness of the section shall not exceed the
reference, provisions from other publications. These nor- values specified in table 1.
mative references are cited at the appropriate places in the For unequal leg angles, the longer leg length, a , shall be
text and the publications are listed hereafter. For dated used.
references, subsequent amendments to or revisions of any
of these publications apply t o this European Standard only
4.4 Deviation from straightness (4)
when incorporated in it by amendment or revision. For
undated references, the latest edition of the publication The deviation from straightness shall not exceed the values
referred to applies. specified in table 1.
EN 10056-1 (at present at the stage of draft) For unequal leg angles, the longer leg length, a, shall be
Structural steel equal and unequal used.
leg angles. Part 1: Nominal size
ranges
EN 1O 079 Definition of steel products
EURONORM 56-77 Hot rolled equal angles (with radi-
5 Tolerance on mass
used root and toes) The deviation from the nominal mass of any angle shall not
EURONORM 57-78 Hot rolled unequal angles (with radi- exceed C 6 % for thicknesses, t , not exceeding 4 mm, or
used root and toes) f 4 % for thicknesses, t , over 4 mm.
The deviation from the nominal mass is the difference
3 Definitions between the actual mass of the angle and the calculated
mass. The calculated mass shall b e determined using a
For the purposes of this European Standard, the definitions
density of 7,85kg/drn3.
given in EN 10079 apply.

4 Tolerances on shape and dimensions

4.1 Leg length (a or b) 6 Tolerance on length
The nominal leg length shall be wjthin the tolerances gjven The tolerance on ordered length shall be it 50 mm, or
in table 1. +'tomm where minimum lengths are required.

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EN 1 O 056-2: 1993

Table 1: Tolerances on dimensions, squareness and straightness of structuralsteel equal and unequal leg angles

Dimensions Leg length, a Section thickness, t

Tolerance on
Nominal size a and b Nominal size Tolerance
mm

100 < a 5 150 f 3,O lo< t < 15 1,oo

150 < a a 200 f 4,O t>15 f 120

Squarenesc Out-of-squareness, k
I
Leg length, a

a I 100
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100 < a < 150 1.5

~~~

150<as200 2,o

a>200 3,O

Straightness Tolerance on straightness, q

Tolerance over any length
Tolerance over Relevant
Leg length, e full leg length, Leg length, a length 4
mm mm
-
a i 150 0.4% of L 1500 6
-
3

a > 200 3000 3

Annex A (informative)
Straightness measurement
Straightness measurement requires the use of a straight edge from which deviations in section straightness are measured.
A taut string line is an acceptable straight edge, provided that deviations in the horizontal plane only are measured.
Measurement shall be carried out as follows: The angle is placed on one leg on a flat surface, and the string is taken from
the flat surface t o the toe of the other (unconstrained) leg. The width of the gap between the string and the unconstrained
leg shall be measured.

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