oSIST prEN 17020-2:2021
(Main)Extended application of test results on durability of self-closing for fire resistance and/or smoke control doorsets and openable windows - Part 2: Durability of self-closing of steel rolling shutters
Extended application of test results on durability of self-closing for fire resistance and/or smoke control doorsets and openable windows - Part 2: Durability of self-closing of steel rolling shutters
This document covers steel rolling shutters as covered by EN 15269 10 or EN 15269 20.
This document prescribes the methodology for extending the application of test results obtained from durability self-closing test(s) conducted in accordance with EN 16034.
Subject to the completion of the appropriate self-closing test or tests, the extended application could cover all or some of the following non-exhaustive list:
— shutter curtain;
— wall/ceiling fixed elements (frame/suspension system);
— decorative finishes;
— intumescent, smoke, draught or acoustic seals;
— alternative supporting construction(s).
Erweiterter Anwendungsbereich von Prüfergebnissen zur Dauerhaftigkeit der Selbstschließung für Feuerschutz- und/oder Rauchschutztüren und zu öffnende Fenster - Teil 2: Dauerhaftigkeit der Selbstschließung von Rolltoren aus Stahl
Diese Europäische Norm befasst sich mit Rolltoren aus Stahl wie in EN 15269 10 oder EN 15269 20 beschrieben.
Dieses Dokument beschreibt die Methodik zur Erweiterung der Anwendung von Ergebnissen aus Dauerfunktionsprüfung(en) des Selbstschließens, die nach EN 16034 durchgeführt wurden.
In Abhängigkeit von der Durchführung der entsprechenden Prüfung oder Prüfungen zum Selbstschließen darf der erweiterte Anwendungsbereich einige oder alle der nachstehend aufgeführten Bereiche abdecken, wobei diese Liste als unvollständig anzusehen ist:
— Rollpanzer;
— Wand-/Deckenbefestigungselemente (Rahmen/Aufhängungssysteme);
— dekorative Oberflächenbeschichtungen;
— dämmschichtbildende Dichtungen, sowie Dichtungen zur Behinderung von Rauchdurchtritt (Rauchschutzdichtungen), Durchzug oder Schallübertragung (Schallschutzdichtungen);
— alternative Tragkonstruktion(en).
Application étendue des résultats d’essais de durabilité de la fermeture automatique des blocs-portes et fenêtres ouvrantes résistants au feu et/ou étanches à la fumée - Partie 2 : Durabilité de la fermeture automatique des rideaux à enroulement en acier
Le présent document couvre les rideaux à enroulement en acier visés par l’EN 15269 10 ou l’EN 15269 20.
Le présent document établit la méthodologie d’extension de l’application des résultats d’essai obtenus suite aux essais de durabilité de la fermeture automatique réalisés conformément à l’EN 16034.
Sous réserve de la réalisation de l’essai ou des essais appropriés de fermeture automatique, l’application étendue pourrait couvrir tout ou partie des éléments de la liste non exhaustive suivante :
— tablier de rideau ;
— éléments fixes muraux/de plafond (structure/système de suspension) ;
— finitions décoratives ;
— joints intumescents, joints d’étanchéité aux fumées, joints d’étanchéité à l’air ou joints acoustiques ;
— autres supports.
Razširjena uporaba rezultatov preskusov trajnosti samozapiranja za požarno odporna in/ali dimotesna vrata in okna, ki se odpirajo - 2. del: Trajnost samozapiranja jeklenih valjanih zapiral
General Information
Standards Content (sample)
SLOVENSKI STANDARD
oSIST prEN 17020-2:2021
01-junij-2021
Razširjena uporaba rezultatov preskusov trajnosti samozapiranja za požarno
odporna in/ali dimotesna vrata in okna, ki se odpirajo - 2. del: Trajnost
samozapiranja jeklenih valjanih zapiral
Extended application of test results on durability of self-closing for fire resistance and/or
smoke control doorsets and openable windows - Part 2: Durability of self-closing of steel
rolling shuttersErweiterter Anwendungsbereich von Prüfergebnissen zur Dauerhaftigkeit der
Selbstschließung für Feuerschutz- und/oder Rauchschutztüren und zu öffnende Fenster
- Teil 2: Dauerhaftigkeit der Selbstschließung von Rolltoren aus StahlApplication étendue des résultats d ’essais de durabilité de la fermeture automatique des
blocs-portes et fenêtres ouvrantes résistants au feu et/ou étanches à la fumée - Partie 2
: Durabilité de la fermeture automatique des rideaux à enroulement en acierTa slovenski standard je istoveten z: prEN 17020-2
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
91.060.50 Vrata in okna Doors and windows
oSIST prEN 17020-2:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 17020-2:2021
DRAFT
EUROPEAN STANDARD
prEN 17020-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2021
ICS 13.220.50; 91.060.50
English Version
Extended application of test results on durability of self-
closing for fire resistance and/or smoke control doorsets
and openable windows - Part 2: Durability of self-closing
of steel rolling shutters
Erweiterter Anwendungsbereich von Prüfergebnissen
zur Dauerhaftigkeit der Selbstschließung für
Feuerschutz- und/oder Rauchschutztüren und zu
öffnende Fenster - Teil 2: Dauerhaftigkeit der
Selbstschließung von Rolltoren aus Stahl
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 127.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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17020-2:2021 E
worldwide for CEN national Members.---------------------- Page: 3 ----------------------
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Contents Page
European foreword ............................................................................................................................................. 3
Introduction .......................................................................................................................................................... 4
1 Scope .......................................................................................................................................................... 5
2 Normative references .......................................................................................................................... 5
3 Terms and definitions ......................................................................................................................... 6
4 Determination of the field of extended application ................................................................. 6
4.1 General ...................................................................................................................................................... 6
4.2 Procedure for evaluation ................................................................................................................... 6
4.3 Procedure for maximum field of extended application .......................................................... 7
4.4 Interpretation of test results ............................................................................................................ 7
5 Extended application report ............................................................................................................. 7
6 Classification report ............................................................................................................................. 8
Annex A (normative) Construction parameter variations .................................................................. 9
Annex B (normative) Steel rolling shutter assemblies stress calculation method ..................41
B.1 Calculation principles ........................................................................................................................41
B.2 Calculation of limiting stress ..........................................................................................................41
B.3 Barrel calculations ..............................................................................................................................41
B.4 Barrel support bracket calculations ............................................................................................43
B.5 Shaft / axle calculations ....................................................................................................................43
B.6 Endplate calculations.........................................................................................................................44
Annex C (informative) Figures related to Annex A and Annex B ....................................................48
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European foreword
This document (prEN 17020-2:2021) has been prepared by Technical Committee CEN/TC 127 “Fire
safety in buildings”, the secretariat of which is held by BSI.This document is currently submitted to the CEN Enquiry.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.A list of all parts in the EN 17020 series can be found on the CEN website.
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Introduction
The EN 15269 series of standards covering extended application of test results for fire resistance and/or
smoke control for door, shutter and openable window assemblies, including their elements of building
hardware, does not include the durability of self-closing of the doorsets following an extended application
process. This document is one of the EN 17020 series of standards intended to be used for the purpose
of producing an extended application report based on the evaluation of one or more durability self-
closing tests. These European Standards may also be used to identify the best selection of test specimens
required to cover a wide range of product variations.Before there can be any consideration for extended application, the doorset should have been tested in
accordance with EN 12605:2017+A1:2020 to achieve a test result which could generate a classification
in accordance with EN 13501-2 and EN 16034 at least equal to the classification subsequently required
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1 Scope
This document covers steel rolling shutters as covered by EN 15269-10 or EN 15269-20.
This document prescribes the methodology for extending the application of test results obtained from
durability self-closing test(s) conducted in accordance with EN 16034.Subject to the completion of the appropriate self-closing test or tests, the extended application could
cover all or some of the following non-exhaustive list:— shutter curtain;
— wall/ceiling fixed elements (frame/suspension system);
— decorative finishes;
— intumescent, smoke, draught or acoustic seals;
— alternative supporting construction(s).
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 1363-1, Fire resistance tests - Part 1: General requirementsEN 1363-2, Fire resistance tests - Part 2: Alternative and additional procedures
EN 1634-1, Fire resistance and smoke control tests for door and shutter assemblies, openable windows and
elements of building hardware - Part 1: Fire resistance test for door and shutter assemblies and openable
windowsEN 1634-3, Fire resistance and smoke control tests for door and shutter assemblies, openable windows and
elements of building hardware - Part 3: Smoke control test for door and shutter assemblies
EN 12433-1, Industrial, commercial and garage doors and gates - Terminology - Part 1: Types of doors
EN 12433-2, Industrial, commercial and garage doors and gates - Terminology - Part 2: Parts of doors
EN 12605:2017+A1:2020, Industrial, commercial and garage doors and gates - Mechanical aspects - Test
methodsEN 13501-2:2016, Fire classification of construction products and building elements - Part 2: Classification
using data from fire resistance tests, excluding ventilation servicesEN 15269-1, Extended application of test results for fire resistance and/or smoke control for door, shutter
and openable window assemblies, including their elements of building hardware - Part 1: General
requirementsEN 16034, Pedestrian doorsets, industrial, commercial, garage doors and openable windows - Product
standard, performance characteristics - Fire resisting and/or smoke control characteristics
EN ISO 13943, Fire safety - Vocabulary (ISO 13943)---------------------- Page: 7 ----------------------
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3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 1363-1, EN 1363-2, EN 1634-1,
EN 1634-3, EN 15269-1, EN 12433-1, EN 12433-2 and EN ISO 13943 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/ui— IEC Electropedia: available at http://www.electropedia.org/
3.1
full scale test
test of a full size doorset or rolling shutter in accordance with EN 16034
4 Determination of the field of extended application
4.1 General
4.1.1 Before there can be any consideration for extended application, the steel rolling shutter
assemblies shall have been tested in accordance with EN 12605:2017+A1:2020 or EN 1191 to achieve a
test result which could generate a classification in accordance with EN 13501-2 and EN 16034.
4.1.2 A review of the construction parameters can indicate that one or more characteristics may be
improved by a particular parameter variation. All evaluations shall be made on the basis of retaining the
classifications obtainable from testing to EN 16034, including those with a lower number of opening and
closing cycles. However, this shall never lead to an increased classification for any specific parameter
beyond that achieved during any one test unless specifically identified in the relevant Construction
Parameter Variation tables.4.1.3 If, when following the extended application procedure, any part of the classified product cannot
be achieved by extended application rules, that part shall be omitted from the subsequent extended
application report and classification report.4.2 Procedure for evaluation
4.2.1 Identify the variations from the original test specimen(s) which are required to be covered by an
extended application report. Ensure that the variation(s) do(es) not prevent the shutter from self-closing.
4.2.2 Locate the variations in the appropriate parameter variation by reference to columns (1) and (2)
of Table A.1.4.2.3 Establish from the contents of column (3) of Table A.1 whether any extended application is
available without the need for further testing.4.2.4 Where this is deemed to be possible this can be recorded in the extended application report
together with any appropriate restrictions and the stated rules from column (3) in Table A.1.
4.2.5 Where the variations required can only be achieved from additional testing according to
column (4) of Table A.1, the additional test can be made on a similar specimen type to the original test
against which the extended application is sought. Alternatively, column (4) identifies an option for
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4.3 Procedure for maximum field of extended application
4.3.1 It is possible to provide a limited field of extended application from the results of a single test.
However, where a manufacturer intends to produce a range of steel rolling shutter assemblies
incorporating manual and power drives, insulated and uninsulated version, with alternative elements of
construction etc. it is recommended that careful consideration is given to the complete range of designs
and options in order to minimize the testing required before testing commences.4.3.2 Establish all the parameter variations which are required to be part of the product range.
4.3.3 Determine which are the most important specification requirements and incorporate as many as
possible into the specimen(s) for the first tests in the series.4.3.4 Conduct the first durability test or a series of tests and then establish which of the original desired
parameter variations have not been covered by this test(s).4.3.5 Identify these parameter variations in Table A.1 and establish if any extended application is
possible without further testing.4.3.6 Record this for the extended application report together with any restrictions and rules given in
column (3) in Table A.1.4.3.7 Evaluate which, if any, of the desired parameter variations have not been covered by the initial
field of extended application derived from 4.3.6 above.4.3.8 Select the required outstanding parameter variations from column (1) and column (2) of
Table A.1 and observe from column (4) of Table A.1 which are the most appropriate weakest specimen
options for further testing.4.3.9 If the complete selection of required parameter variations has not been covered by the tests
completed in accordance with 4.3.8 above, then an appropriate test or tests may be repeated with the
additional product variations incorporated.4.4 Interpretation of test results
4.4.1 In order to maximize the field of extended application, it is important that the test reports shall
record details of any failures which occurred throughout the test duration.4.4.2 Where a series of tests have been conducted, the field of extended application shall be based on
the lowest performance achieved from the complete series of tests unless premature failure has been
attributed to one or more specific construction parameter variation.4.4.3 Where it has been possible to identify specific parameter failures, the extended application for all
other construction parameter variations can be based on the performance achieved after isolating the
premature failure(s).5 Extended application report
Prepare an extended application report in accordance with the requirements of EN 15269-1 and
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6 Classification report
The classification report shall be determined from the results of the extended application report and shall
be presented in accordance with EN 13501-2:2016, Annex A.---------------------- Page: 10 ----------------------
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Annex A
(normative)
Construction parameter variations
Table A.1 below is designed to be used by experts competent in the field of fire resistance and self-closing
durability testing of steel rolling shutter assemblies.The table shall only be used to assess a field of extended application when at least one positive self-closing
durability test to EN 12605:2017+A1:2020 or EN 1191 has generated a classification according to
EN 13501-2 and EN 16034.The first two columns identify possible variations to the construction details of the specimen tested. It is
presupposed that the variation does not restrain the rolling shutter closing.Column (3) leads to the judgement of the possibility of extending the field of application.
Where additional tests are deemed to be necessary, the type of specimen approved for incorporation of
the changed parameter is defined in column (4). Where it is possible to use information from tests
performed on one configuration for evidence on a different configuration, this allowance has been made
in order to reduce the overall number of tests required for extended application evaluation.
Where an additional test is required in column (4), the test is a full scale test unless otherwise specified.
In order to maximize the possible field of application from a minimum number of tests, the parameter
changes have been spread over a series of test specimens. Where more than a single parameter variation
is required, the influence on other variations shall also be taken into account.For figures relating to Table A.1 see Annex C.
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Table A.1 — Construction parameters
Additional evidence
Construction parameter Variation Possibility of extension
required
(1) (2) (3) (4)
A General (See Figure C.1 for an example of a general arrangement of a rolling shutter construction)
A.1 Size variations / constructionPossible providing tightness and clearances are not changed.
A.1.1 Width between vertical guides
Decrease Full scale test
(See Figure C.2)
Otherwise not possible without an additional test.
Possible providing the static requirements to fixings, barrel
and load-bearing constructions are fulfilled and the
A.1.2 Distance between vertical
requirements of Annex B are satisfied (at ambient
guides Increase Full scale test
temperature).
(See Figure C.2)
Otherwise not possible without an additional test.
A.1.3 Height from floor level to centre
Decrease Possible -
line of barrel (See Figure C.3)
Possible providing the static requirements to fixings, barrel
and load-bearing constructions are fulfilled and the
A.1.4 Height from floor level to centre
requirements of Annex B are satisfied (at ambient
Increase Full scale test
line of barrel (See Figure C.3)
temperature).
Otherwise not possible without an additional test.
Possible providing a minimum gap of 10 mm will remain
A.1.5 Expansion allowances between
during opening/closing
Decease Full scale test
the end of the lath and guide
Otherwise not possible without an additional test
A.1.6 Expansion allowances between
Increase Possible -
the end of the lath and guide
Face fixed on
A.1.7 Mounting furnace side to Possible -
within opening
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Additional evidence
Construction parameter Variation Possibility of extension
required
(1) (2) (3) (4)
Within opening to
A.1.8 Mounting face fixed on Possible -
furnace side
A.2 Materials and constructions
Possible providing no abrasion will occur (in general this is
given if no moving part touches the insulation material
A.2.1 Insulation material whether
Change Full scale test
during opening/closing).
intumescent or not
Otherwise not possible without an additional test.
Possible providing no moving part touches the insulation
material during opening/closing).
A.2.2 Density of insulation material Increase Full scale test
Otherwise not possible without an additional test.
Possible providing no moving part touches the insulation
material during opening/closing).
A.2.3 Density of insulation material Decrease Full scale test
Otherwise not possible without an additional test.
Possible but only for an identical composition or if no moving
Change of supplier
part touches the insulation material during opening/closing).
A.2.4 Intumescent material and/or Full scale test
manufacturer
Otherwise not possible without an additional test.
Possible providing no moving part touches the insulation
Alternative
material during opening/closing).
A.2.5 Intumescent material Full scale test
material
Otherwise not possible without an additional test.
Possible providing no moving part touches the insulation
A.2.6 Thickness of insulation material
material during opening/closing).
Increase Full scale test
other than curtains
Otherwise not possible without an additional test.
A.2.7 Thickness of insulation material
Decrease Possible -
other than curtains
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Additional evidence
Construction parameter Variation Possibility of extension
required
(1) (2) (3) (4)
B Curtain
B.1 Laths
Possible providing interlock remains the same and the
interaction with parts touching the curtain (e.g. press rollers)
B.1.1 Size (height of lath) (See
remains the same or a test has been passed (with a similar
Decrease Full scale test
Figure C.4)
type of rolling shutter assembly) with this type of laths.
Otherwise not possible without an additional test.
Possible providing a test has been passed (with a similar type
of rolling shutter assembly) with this type of laths with the
B.1.2 Size (height of lath) (See
Increase Full scale test
same or lower barrel diameter.
Figure C.5)
Otherwise not possible without an additional test.
Possible providing a test has been passed (with another type
of rolling shutter assembly) with this type of laths with the
B.1.3 Thickness of steel Decrease Full scale test
same or lower barrel diameter.
Otherwise not possible without an additional test.
Possible providing a test has been passed (with another type
of rolling shutter assembly) with this type of laths with the
B.1.4 Thickness of steel Increase Full scale test
same or smaller barrel diameter.
Otherwise not possible without an additional test.
Possible providing a test has been passed (with another type
of rolling shutter assembly) with this type of laths with the
B.1.5 Thickness of insulation material
Decrease Full scale test
same or smaller barrel diameter.
(See Figure C.6)
Otherwise not possible without an additional test.
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Additional evidence
Construction parameter Variation Possibility of extension
required
(1) (2) (3) (4)
Possible providing a test has been passed (with another type
of rolling shutter assembly) with this type of laths with the
same or smaller barrel diameter and assuming that the gap
B.1.6 Thickness of insulation material
between the skins is full of insulating material and that the
Increase Full scale test
(See Figure C.7)
thickness of lath creates a corresponding increase in the
width of the guides.
Otherwise not possible without an additional test.
Possible providing the material is not loaded mechanically
(e.g. pulled or bended) or a test has been passed (with
another type of rolling shutter assembly) with this type of
insulation material with the same or smaller barrel diameter
B.1.7 Density of insulation material Increase Full scale test
and the requirements of Annex B are satisfied (at ambient
temperature).
Otherwise not possible without an additional test.
Possible providing the material is not loaded mechanically
(e.g. pulled or bended) or a test has been passed (with
another type of rolling shutter assembly) with this type of
B.1.8 Density of insulation material Decrease Full scale test
insulation material with the same or smaller barrel diameter.
Otherwise not possible without an additional test.
Mild steel to
B.1.9 Material Possible -
stainless steel
Stainless steel to
B.1.10 Material Possible -
mild steel
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Additional evidence
Construction parameter Variation Possibility of extension
required
(1) (2) (3) (4)
Possible providing half the circumference of the barrel is
covered or a test has been passed (with another type of
B.1.11 Number of laths on barrel when
rolling shutter assembly) with this type of insulation material
Decrease Full scale test
door is in closed position
with the same or smaller barrel diameter.
Otherwise not possible without an additional test.
B.1.12 Number of laths on barrel when
Increase Possible -
door is in closed position
Possible providing interlock remains the same and the
interaction with parts touching the curtain (e.g. press rollers)
remains the same or a test has been passed (with a similar
B.1.13 Shape (single skin) (See
Change Full scale test
type and weight of rolling shutter assembly) with this type of
Figure C.8)
laths.
Otherwise not possible without an additional test.
Possible providing a test has been passed (with a similar type
and weight of rolling shutter assembly) with this type of
B.1.14 Single skin to double skin or
insulation material with the same or smaller barrel diameter
double skin to single skin Change Full scale test
and the requirements of Annex B are satisfied (at ambient
(See Figure C.9)
temperature).
Otherwise not possible without an additional test.
B.2 Endlocks (see Figure C.10 for example of an endlock)
Possible providing the endlocks do not touch the ground of
the side guides during opening/closing.
B.2.1 Size and shape Decrease Full scale test
Otherwise not possible without an additional test.
Possible providing requirements in respect of clearances and
interlock remain unchanged.
B.2.2 Size and shape Increase Full scale test
Otherwise not possible without an additional test.
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Additional evidence
Construction parameter Variation Possibility of extension
required
(1) (2) (3) (4)
Possible providing the endlocks do not touch the ground of
the side guides during opening/closing.
B.2.3 Thickness Decrease Full scale test
Otherwise not possible without an additional test.
Possible providing requirements in respect of expansion
clearances and interlock remain unchanged.
B.2.4 Thickness Increase Full scale test
Otherwise not possible without an additional test.
Steel to malleable
B.2.5 Material Possible -
iron
Malleable iron to
B.2.6 Material Possible -
steel
Possible providing the endlocks do not touch the ground of
the side guides during opening/closing.
B.2.7 Material Steel to plastic Full scale test
Otherwise not possible without an additional test.
Possible providing the endlocks do not touch the ground of
the side guides during opening/closing.
B.2.8 Material Plastic to steel Full scale test
Otherwise not possible without an additional test.
Possible providing the endlocks do not touch the ground of
the side guides during opening/closing.
B.2.9 Material Steel to aluminium Full scale test
Otherwise not possible without an additional test.
Possible providing the endlocks do not touch the ground of
the side guides during opening/closing.
B.2.10 Material Aluminium to steel Full scale test
Otherwise not possible without an additional test.
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Additional evidence
Construction parameter Variation Possibility of extension
required
(1) (2) (3) (4)
B.3 Endlock Fixings
Possible providing a test has been passed (with a similar type
of rolling shutter assembly) with this diameter of endlock
B.3.1 Size (diameter) Decrease Full scale test
fixing with the same or smaller barrel diameter.
Otherwise not possible without an additional test.
B.3.2 Size (diameter) Increase Possible
Possible providing a test has been passed (with a similar type
of rolling shutter assembly) with this t
...
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