Curtain walling - Determination of the strength of shear connections - Test method and requirements

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 for which it 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.

Vorhangfassaden - Bestimmung der Beanspruchbarkeit von auf Abscheren beanspruchten Verbindungen - Prüfverfahren und Anforderungen

Dieses Dokument legt Prüfverfahren zur Bestimmung der Tragfähigkeit (Grenzzustand der Tragfähigkeit und Grenzzustand der Gebrauchstauglichkeit) der Verbindungen zwischen den Rahmenprofilen der Vorhangfassade fest, die nicht nach geltenden Codes oder herkömmlichen Berechnungen, die auf der Festigkeit der Werkstoffe basieren, berechnet werden können.
Die mechanischen Leistungen der Verbindungen von Vorhangfassaden werden bereits in Übereinstimmung mit den Festlegungen nach EN 13830 bewertet. Zusätzliche Angaben zur mechanischen Leistung der Verbindungen und zu den direkten Anwendungsbereichen können nach diesem Dokument bestimmt werden.

Façades rideaux - Détermination de la résistance des assemblages - Méthode d’essai et exigences

Le présent document spécifie des méthodes d’essai pour la détermination de la capacité portante (état limite ultime et état limite de service) des assemblages entre des éléments d’ossature de façades rideaux pour lesquels celle-ci ne peut pas être calculée selon les codes courants ou les calculs classiques basés sur la résistance des matériaux.
Les performances mécaniques des assemblages des façades rideaux sont déjà évaluées en conformité avec les dispositions décrites dans l’EN 13830. Des informations complémentaires par rapport à la performance mécanique des assemblages et des applications directes peuvent être déterminées selon ce document.

Obešene fasade - Ugotavljanje trdnosti strižnih spojev - Preskusna metoda in zahteve

General Information

Status
Published
Public Enquiry End Date
19-Mar-2020
Publication Date
17-Jun-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
14-Jun-2021
Due Date
19-Aug-2021
Completion Date
18-Jun-2021

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SLOVENSKI STANDARD
SIST EN 16758:2021
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
SIST EN 16758:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 16758:2021
---------------------- Page: 2 ----------------------
SIST EN 16758:2021
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.
---------------------- Page: 3 ----------------------
SIST EN 16758:2021
EN 16758:2021 (E)
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

---------------------- Page: 4 ----------------------
SIST EN 16758:2021
EN 16758:2021 (E)
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

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.
---------------------- Page: 5 ----------------------
SIST EN 16758:2021
EN 16758:2021 (E)
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
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

C Distance between the centre of gravity axis of the mullion and the vertical forces

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
---------------------- Page: 6 ----------------------
SIST EN 16758:2021
EN 16758:2021 (E)
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

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
Vertical force
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
τ Statistical eccentricity of 5 % with 75 % confidence
---------------------- Page: 7 ----------------------
SIST EN 16758:2021
EN 16758:2021 (E)
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.

---------------------- Page: 8 ----------------------
SIST EN 16758:2021
EN 16758:2021 (E)

Figure 1 — Schematic T-connection and loading points (any connection method may be chosen)

---------------------- Page: 9 ----------------------
SIST EN 16758:2021
EN 16758:2021 (E)

Figure 2 — Schematic L-connection and loading points (any connection method may be chosen)

---------------------- Page: 10 ----------------------
SIST EN 16758:2021
EN 16758:2021 (E)
Figure 3 — Axial resistance (any connection method may be chosen)
Figure 4 — Schematic T-connection and loading points with glass supports
---------------------- Page: 11 ----------------------
SIST EN 16758:2021
EN 16758:2021 (E)
Figure 5 — Schematic L-connection and loading points with glass supports

Figure 6 — Multiple schematic T-connection and loading points with glass supports

---------------------- Page: 12 ----------------------
...

SLOVENSKI STANDARD
oSIST prEN 16758:2020
01-marec-2020
Obešene fasade - Ugotavljanje trdnosti strižnih spojev - Preskusna metoda in
zahteve

Curtain walling - Determination of the strength of sheared 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: prEN 16758
ICS:
91.060.10 Stene. Predelne stene. Walls. Partitions. Facades
Fasade
oSIST prEN 16758:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 16758:2020
---------------------- Page: 2 ----------------------
oSIST prEN 16758:2020
DRAFT
EUROPEAN STANDARD
prEN 16758
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2020
ICS 91.060.10 Will supersede EN 16758:2016
English Version
Curtain walling - Determination of the strength of sheared
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 draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 33.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16758:2020 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN 16758:2020
prEN 16758:2019 (E)
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 ..................................................................................................................................... 5

5.1 General ................................................................................................................................................................ 5

5.2 Samples ............................................................................................................................................................... 5

5.3 Loadings........................................................................................................................................................... 14

5.3.1 Preloading ....................................................................................................................................................... 14

5.3.2 Vertical loading ............................................................................................................................................. 14

5.3.3 Horizontal loading ....................................................................................................................................... 14

5.3.4 Interpretation of the loading records ................................................................................................... 15

6 Calculation for combined of horizontal and vertical loadings ..................................................... 15

6.1 Method A.......................................................................................................................................................... 15

6.2 Method B (detailed, optional) .................................................................................................................. 15

7 Test report ...................................................................................................................................................... 17

Annex A (informative) Determination of the design loading of a connection - Serviceability

limit state ........................................................................................................................................................ 18

Annex B (normative) Determination of the design loading of a connection - Ultimate limit

state ................................................................................................................................................................... 22

Annex C (normative) Field of direct application ............................................................................................ 23

Bibliography ................................................................................................................................................................. 24

---------------------- Page: 4 ----------------------
oSIST prEN 16758:2020
prEN 16758:2019 (E)
European foreword

This document (prEN 16758:2020) 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 document is currently submitted to the CEN Enquiry.
This document will supersede EN 16758:2016.
---------------------- Page: 5 ----------------------
oSIST prEN 16758:2020
prEN 16758:2019 (E)
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 for which it 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.
2 Normative references

The following documents are referred to in the text in such a way that some of all of their contents

constitute 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:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
connection

set of components designed to transfer loads between framing members (e.g. cleat, screw)

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 axis of the mullion
c Elasticity constant
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

c Distance between the centre of gravity axis of the mullion and the vertical forces

DT 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 deflection glass support by F
ave,ela ave,ela
F Average force
ave
F Maximum average elastic force corresponding to the maximum deformation of the
ave,ela
elastic part of the graph (forces F, deformation ε)
---------------------- Page: 6 ----------------------
oSIST prEN 16758:2020
prEN 16758:2019 (E)
F Design force at the service limit state
des,s
F Design horizontal load
h,des
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 Characteristic force giving 75 % confidence that 95 % of the test results will be

u,5
higher than this value
F characteristic force at the service limits state
u,5,s
F Horizontal force
F Vertical force
g Distance between the edge of the infill and edge of the setting block

p Maximum thickness of the infill panel, also measurement reference point for the

infill support deflection
S Sample restrains
s Standard deviation of the series under consideration
dev
ULS Ultimate Limit State
w Deflection of the glass support
γ partial factor for the connection applicable to rupture
τ Statistical eccentricity of 5 % with 75 % confidence
5 Method of evaluation
5.1 General

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 transducers (DT). The support 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 web buckling;

— the frame of the test bench shall be rigid enough not to introduce inaccuracies when recording the

prototype deformation.
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 etc.), different types of

connection between the framing members should be tested, depending upon the design of the

connection.
---------------------- Page: 7 ----------------------
oSIST prEN 16758:2020
prEN 16758:2019 (E)

Figures 1 to 3 are examples of typical test configurations, but different configurations may be used.

The sample restrains “S” given in the Figures 1 to 3 are given as an indication. They should be designed

in such way that only that the recorded data during the tests are limited to behaviour of the connection.

Figures 4 to 7 are examples of typical test configurations incorporating actual glass supports.

Figure 1 — Schematic T-connection and loading point (any connection method can be chosen)

---------------------- Page: 8 ----------------------
oSIST prEN 16758:2020
prEN 16758:2019 (E)

Figure 2 — Schematic L-connection and loading points (any connection method can be chosen)

---------------------- Page: 9 ----------------------
oSIST prEN 16758:2020
prEN 16758:2019 (E)
Figure 3 — Axial resistance (any connection method can be chosen)
Figure 4 — Schematic T- connection and loading points
---------------------- Page: 10 ----------------------
oSIST prEN 16758:2020
prEN 16758:2019 (E)
Figure 5 — Schematic L- connection and loading points
Figure 6 — Multiple schematic T- connection and loading points
---------------------- Page: 11 ----------------------
oSIST prEN 16758:2020
prEN 16758:2019 (E)
Figure 7 — Axial resistance for an intermediate mullion
NOTE Figure 7 can be considered as a principle for axial resistance of transoms.

The Figure 8 shows the position of the transducers when strength of shear connection only is evaluated

Figure 8 — Dead load (F )
---------------------- Page: 12 ----------------------
oSIST prEN 16758:2020
prEN 16758:2019 (E)
Figure 9.a — Dead load (F ) - Cantilever glass support
Figure 9.b — Dead load (F ) – schemati
...

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