EN 16758:2021

SLOVENSKI STANDARD
01-september-2021
Nadomešča:
SIST EN 16758:2016
Obešene fasade - Ugotavljanje trdnosti strižnih spojev - Preskusna metoda in
zahteve
Curtain walling - Determination of the strength of shear connections - Test method and
requirements
Vorhangfassaden - Bestimmung der Beanspruchbarkeit von auf Abscheren
beanspruchten Verbindungen - Prüfverfahren und Anforderungen
Façades rideaux - Détermination de la résistance des assemblages - Méthode d’essai et
exigences
Ta slovenski standard je istoveten z: EN 16758:2021
ICS:
91.060.10 Stene. Predelne stene. Walls. Partitions. Facades
Fasade
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 16758
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2021
EUROPÄISCHE NORM
ICS 91.060.10 Supersedes EN 16758:2016
English Version
Curtain walling - Determination of the strength of shear
connections - Test method and requirements
Façades rideaux - Détermination de la résistance des Vorhangfassaden - Bestimmung der
assemblages - Méthode d'essai et exigences Beanspruchbarkeit von auf Abscheren beanspruchten
Verbindungen - Prüfverfahren und Anforderungen
This European Standard was approved by CEN on 12 April 2021.

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 to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 16758:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Symbols and abbreviations . 4
5 Method of evaluation . 6
5.1 General . 6
5.2 Samples . 6
5.3 Loadings. 15
5.3.1 Preloading . 15
5.3.2 Vertical loading . 15
5.3.3 Horizontal loading . 15
5.3.4 Interpretation of the loading records . 16
6 Calculation for combined of horizontal and vertical loadings . 16
6.1 Method A. 16
6.2 Method B (detailed, optional) . 16
7 Test report . 18
Annex A (informative) Determination of the design loading of a connection - Serviceability
limit state . 20
Annex B (normative) Determination of the design loading of a connection - Ultimate limit
state . 24
Annex C (normative) Field of direct application . 25
Bibliography . 26

European foreword
This document (EN 16758:2021) has been prepared by Technical Committee CEN/TC 33 “Doors,
windows, shutters, building hardware and curtain walling”, the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by November 2021, and conflicting national standards shall
be withdrawn at the latest by November 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 16758:2016.
The main changes compared to the previous edition, EN 16758:2016, are listed below:
— new specifications were added in “5.1 General” when using an infill panel to apply the forces,
— new sample restraints “S” were added in figures where missing and the direction of application of “S”
was modified in order to have the equilibrium of forces applied to samples represented in figures,
— new figures for cruciform/half cruciform glass support, showing the application of dead load and the
position of DT, were added,
— the dimensions of the samples were modified, as described in 5.2,
— the deformation speed for vertical and horizontal loading was modified, as specified in 5.3,
— new specifications for horizontal loading were added (see 5.3.3.1),
— new subclause (5.3.4) was added, regarding the interpretation of the loading records with reference
to Annex A and Annex B,
— more detailed information was added in the test report,
— in Annex A and Annex B, new reference to ISO 16269-6 and introduction of the variable τ as a
αβ
function of the number of test pieces, in order to determine the design load of the connection.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United
Kingdom.
1 Scope
This document specifies test methods for the determination of bearing capacity (ultimate limit state and
serviceability limit state), of connections between curtain walling framing members which cannot be
calculated in accordance with current codes or conventional calculations based upon the strength of the
materials.
Mechanical performances of the curtain walling connections are already assessed in accordance with the
provisions described in EN 13830. Additional information with respect to mechanical performance of the
connections and direct applications can be determined with this document (see Annex C).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 13119, Curtain walling — Terminology
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 13119 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
connection
set of components designed to transfer loads between framing members
EXAMPLE Cleat, screw and fittings.
4 Symbols and abbreviations
For the purposes of this document, the following symbols apply.
a Total height of the sample
a , a
Partial height of the sample
1 2
b Distance between the centre of gravity axes of the mullions
c Elasticity constant
w
d Distance between the vertical forces applied on the transom
C Distance between the centre of gravity axis of the mullion and the horizontal forces
h
C Distance between the centre of gravity axis of the mullion and the vertical forces
v
DT Displacement transducer
e Distance from the position of (α), the contact area between the internal infill gasket and the
transom, and the vertical plane containing the centre of the gravity of the infill
f Average of glass support deflections by F
ave,ela ave,ela
F Average force
ave
F The average of the maximum elastic force values corresponding to the maximum
ave,ela
deformation of the elastic part of the graph (forces F, deformation X)
F Design force at the service limit state
des,s
F Design horizontal load
h,des
F Maximum horizontal load design value for a combination of vertical and horizontal loads
h,m
F Maximum force at ultimate limit state for the sample “i”
max,i
F Design force at the ultimate limit state
des,u
F Design vertical load
v,des
F Vertical force applied on the left wing
v,l
F Maximum vertical load design value for a combination of vertical and horizontal loads
v,m
F Vertical force applied on the right wing
v,r
F
Characteristic force giving 75 % confidence that 95 % of the test results is be higher than
u,5
this value
F characteristic force at the service limits state
u,5,s
F Horizontal force
h
F
Vertical force
v
g Distance between the edge of the infill and edge of the setting block
j Sample dimension
p Maximum thickness of the infill panel, also measurement reference for the infill support
deflection
S Sample restraints
s Standard deviation of the series under consideration
dev
SLS Service Limit State
ULS Ultimate Limit State
w Deflection of the glass support
α Contact area between the internal infill gasket and the transom
γ partial factor for the connection applicable to rupture
u
τ Statistical eccentricity of 5 % with 75 % confidence
αß
5 Method of evaluation
5.1 General
In practice, connections are subjected to permanent loads as well as to variable loads. The measurement
of the deformation is recorded at the application of the force unless indicated on the figures with the
position of the displacement transducers (DT). The clamping shall restraint vertical and horizontal
movements. When using an infill panel to apply the forces:
— care shall be taken to avoid friction between the infill panel and the mullion(s);
— no vertical setting block should be used between the infill and the mullion(s);
— the infill should be rigid enough to avoid buckling;
— the frame of the test bench shall be rigid enough not to introduce inaccuracies when recording the
deformation;
— the measurement accuracy should be ±0,1 mm.
5.2 Samples
The samples shall be representative of the connection methods between the framing members of the
curtain walling.
Based on the type of curtain walling (e.g. stick construction, unitized system), different types of
connection between the framing members should be tested, depending upon the design of the connection.
Figures 1 to 3 are examples of typical test configurations, but different configurations may be used.
The sample restraints “S” given in Figures 1 to 3 are given as an indication. They should be designed in
such way that recorded data during the tests are limited to the behaviour of the connection.
Figures 4 to 7 are examples of typical test configurations incorporating glass supports.
Figure 1 — Schematic T-connection and loading points (any connection method may be chosen)
Figure 2 — Schematic L-connection and loading points (any connection method may be chosen)
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