EN 1873:2014

SLOVENSKI STANDARD
01-september-2014
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SIST EN 1873:2006
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Prefabricated accessories for roofing - Individual rooflights of plastics - Product
specification and test methods
Vorgefertigte Zubehörteile für Dacheindeckungen - Lichtkuppeln aus Kunststoff -
Produktfestlegungen und Prüfverfahren
Accessoires préfabriqués pour couverture - Lanterneaux ponctuels en matière plastique -
Spécifications des produits et méthodes d'essais
Ta slovenski standard je istoveten z: EN 1873:2014
ICS:
91.060.20 Strehe Roofs
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 1873
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2014
ICS 91.060.20 Supersedes EN 1873:2005
English Version
Vorgefertigte Zubehörteile für Dachdeckungen - Lichtkuppeln
aus Kunststoff - Produktspezifikation und Prüfverfahren
Accessoires préfabriqués pour couverture - Lanterneaux Vorgefertigte Zubehörteile für Dacheindeckungen -
ponctuels en matière plastique - Spécifications des produits Lichtkuppeln aus Kunststoff - Produktfestlegungen und
et méthodes d'essais Prüfverfahren
This European Standard was approved by CEN on 23 February 2014.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1873:2014 E
worldwide for CEN national Members.

Contents Page
Foreword .6
1 Scope .7
2 Normative references . 10
3 Terms and definitions . 11
4 Symbols and abbreviations . 13
5 Requirements . 15
5.1 Radiation properties . 15
5.1.1 General . 15
5.1.2 Light transmission . 15
5.1.3 Solar direct transmittance τ . 16
e
5.1.4 Total solar energy transmittance g . 16
5.2 Durability . 16
5.3 Water tightness . 16
5.4 Mechanical performances . 16
5.4.1 Resistance to upward loads . 16
5.4.2 Resistance to downward loads . 16
5.4.3 Impact resistance. 17
5.5 Reaction to fire . 17
5.6 Resistance to fire . 18
5.7 External fire performance . 18
5.8 Air permeability . 18
5.9 Thermal resistance . 18
5.10 Airborne sound insulation . 19
5.11 Release of dangerous substances . 19
6 Testing and classification . 19
6.1 General . 19
6.2 Radiation properties . 19
6.2.1 Total luminous transmittance . 19
6.2.2 Determination of solar direct transmittance τ . 20
e
6.2.3 Determination of total solar energy transmittance g . 20
6.3 Durability . 20
6.3.1 Classification for durability . 20
6.3.2 Conditions for accelerated ageing . 22
6.3.3 Variation of light transmission . 22
6.3.4 Variation in yellowness index . 23
6.3.5 Variation of mechanical properties with ageing . 23
6.3.6 Test specimen . 24
6.4 Watertightness . 24
6.4.1 Principle . 24
6.4.2 Procedure . 24
6.4.3 Apparatus . 24
6.4.4 Test specimen . 24
6.5 Mechanical performances . 26
6.5.1 Resistance to upward and downward loads . 26
6.5.2 Impact resistance. 27
6.6 Fire behaviour . 29
6.7 Air permeability . 29
6.8 Thermal transmittance . 30
6.9 Relationship between characteristics, families and test specimens . 30
6.10 Test report . 32
7 Assessment and verification of constancy of performance - AVCP . 32
7.1 General . 32
7.2 Type testing . 33
7.2.1 General . 33
7.2.2 Test reports . 33
7.3 Factory production control (FPC) . 33
7.3.1 General . 33
7.3.2 General requirements . 34
7.3.3 Product specific requirements . 36
7.3.4 Initial inspection of factory and of FPC . 37
7.3.5 Continuous surveillance of FPC . 38
7.3.6 Procedure for modifications. 38
8 Designation and marking. 38
Annex A (informative) Guidelines for safety, application, use and maintenance . 40
A.1 General . 40
A.2 Guidelines for safety . 40
A.3 Guidelines for application and use . 40
A.4 Maintenance . 41
Annex B (normative) Alternative test method for the determination of light transmission . 42
B.1 General . 42
B.2 Apparatus . 42
B.3 Test pieces . 42
B.4 Procedure . 43
B.5 Expression of results . 43
Annex C (normative) Test method for air permeability . 44
C.1 General . 44
C.2 Test apparatus . 44
C.3 Test specimen . 44
C.4 Test procedure . 45
C.5 Evaluation of the results . 45
C.6 Rounding off to be used for the air permeability . 45
C.7 Test report . 46
Annex D (normative) Determination of thermal transmittance of rooflight . 47
D.1 General . 47
D.2 Determination of thermal transmittance of rooflight components. 47
D.2.1 Determination by measurement . 47
D.2.2 Determination by calculation . 47
D.2.2.1 General . 47
D.2.2.2 Thermal transmittance of the upstand U and U . 47
up up,e
D.2.2.3 Thermal transmittance of the edge profile U . 47
e
D.2.2.4 Thermal transmittance of the junction part U . 47
j
D.2.2.5 Thermal transmittance of the translucent parts U . 47
t
D.2.2.6 Linear thermal transmittances Ψ ,Ψ , Ψ . 48
e j t
D.2.2.7 Definition of starting point for calculation of thermal transmittance . 48
D.3 Determination of areas of a rooflight . 49
D.3.1 Components . 49
D.3.2 Area of the rooflight upstand . 50
D.3.3 Area of the edge profile . 51
D.3.4 Area of the junction part . 53
D.3.5 Area of the translucent part A . 54
t
D.3.6 Surface of the rooflight . 54
D.4 Total thermal transmittance of individual rooflights . 55
D.4.1 General . 55
D.4.2 Total thermal transmittance U of individual rooflights including the edge profile . 56
r
D.4.3 Total thermal transmittance U of individual rooflights including the edge profile and
rc
upstand . 57
D.4.4 Total thermal transmittance U of individual rooflights including the edge profile and
rc
upstand (alternative method) . 59
D.4.5 Total thermal transmittance U of individual rooflights including the upstand without
rc
edge profile . 60
D.4.6 Total thermal transmittance U of individual rooflights including the edge profile and
rc
upstand with more than one translucent part . 61
D.4.7 Rounding off to be used for thermal transmittance in calculation and classification . 62
D.5 Test specimen for evaluation of thermal transmittance: U U . 62
r,ref, rc,ref300
D.5.1 General . 62
D.5.2 Reference models . 63
D.5.2.1 Individual rooflight without upstand. 63
D.5.2.2 Individual rooflight with upstand . 63
D.6 Characteristics for supplied rooflight. 64
Annex E (normative) Reaction to fire test . 65
E.1 Class E . 65
E.1.1 General . 65
E.1.2 Mounting and fixing for the small flame test in accordance to EN ISO 11925-2 . 65
E.2 Class A2 to class D . 66
E.2.1 General . 66
E.2.2 Mounting and fixing for the SBI test . 66
E.3 Class A1 . 66
Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU
Construction Products Regulation . 67
ZA.1 Scope and relevant characteristics . 67
ZA.2 Procedure for AVCP of prefabricated accessories for roofing – individual rooflights of

plastics. . 68
ZA.2.1 Systems of AVCP . 68
ZA.2.2 Declaration of performance (DoP) . 71
ZA.2.2.1 General . 71
ZA.2.2.2 Content. 72
ZA.2.2.3 Example of DoP . 73
ZA.3 CE marking and labelling. 76
Bibliography . 78

Foreword
This document (EN 1873:2014) has been prepared by Technical Committee CEN/TC 128 “Roof covering
products for discontinuous laying and products for wall cladding”, the secretariat of which is held by NBN.
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 October 2014, and conflicting national standards shall be withdrawn at
the latest by October 2014.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 1873:2005.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with the EU Regulation concerning the CPR, see informative Annex ZA, which is an integral
part of this document.
In comparison to the previous edition, the following clauses have been changed: Clause 1, 2, 3, 4, 5, 6, 7, 8,
Annex C, Annex D, Annex E and Annex ZA.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
1 Scope
This European Standard specifies requirements for rooflights made of plastic materials (e.g. GF-UP, PC,
PMMA, PVC) and rooflights with upstands made of e.g. GF-UP, PVC, steel, aluminium or wood for installation
in roofs. These rooflights serve the purpose of introducing daylight.
This European Standard applies to rooflights with a rectangular or circular ground plan (see Figures 1 and 2),
with an opening span (width) or diameter not larger than 2,5 m and an opening length not larger than 3,0 m in
roof pitches up to 25°. This document does not cover rooflights which contribute to the load-bearing or
stiffness of the roof itself.
This European Standard applies to rooflights and rooflights with upstand, where a single manufacturer
provides all components of the rooflight with upstand, which are bought in a single purchase.
This European Standard applies to rooflights with one or several translucent parts.
Rooflights may be opened by means of opening devices in one or more parts for ventilation.
The possible additional functions of day to day ventilation, smoke and heat ventilation e.g. in case of fire in
accordance with EN 12101-2, roof access, and/ or slinging point e.g. in accordance with EN 795 are outside
the scope of this document.
This European Standard does not include calculations with regard to construction, design requirements and
installation techniques.
NOTE Guidelines for safety, application, use and maintenance of individual rooflights are presented in Annex A.
Section X –X without and with additional horizontal skin

Key
a daylight diameter f roof opening length
b roof opening diameter g daylight size
c daylight width h roof opening size
d roof opening width i upstand height
e daylight length j rooflight height
Figure 1 — Typical individual rooflights
2a) Individual rooflight
2b) Individual rooflight with upstand

2c) Individual rooflight with upstand and edge profile

with edge profile without edge profile
2d) Vertical upstands
Key
1 multi skin 4 insulated upstand 7 roof finish
2 single skin 5 non insulated upstand
3 edge profile 6 splayed upstand
Figure 2 — Cross sections of typical individual rooflights and upstands
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 410:2011, Glass in building - Determination of luminous and solar characteristics of glazing
EN 596, Timber structures - Test methods - Soft body impact test of timber framed walls
EN 673, Glass in building - Determination of thermal transmittance (U value) - Calculation method
EN 674, Glass in building - Determination of thermal transmittance (U value) - Guarded hot plate method
EN 675, Glass in building - Determination of thermal transmittance (U value) - Heat flow meter method
EN 1013, Light transmitting single skin profiled plastics sheets for internal and external roofs, walls and
ceilings - Requirements and test methods
CEN/TS 1187, Test methods for external fire exposure to roofs
EN 12412-2, Thermal performance of windows, doors and shutters - Determination of thermal transmittance
by hot box method - Part 2: Frames
EN 13501-1, Fire classification of construction products and building elements — Part 1: Classification using
data from reaction to fire tests
EN 13501-5, Fire classification of construction products and building elements — Part 5: Classification using
data from external fire exposure to roof tests
EN 14351-1, Windows and doors — Product standard, performance characteristics — Part 1: Windows and
external pedestrian doorsets without resistance to fire and/or smoke leakage characteristics
EN 13823, Reaction to fire tests for building products - Building products excluding floorings exposed to the
thermal attack by a single burning item
EN 16153, Light transmitting flat multiwall polycarbonate (PC) sheets for internal and external use in roofs,
walls and ceilings - Requirements and test methods
EN ISO 178, Plastics - Determination of flexural properties (ISO 178)
EN ISO 527-1, Plastics - Determination of tensile properties - Part 1: General principles (ISO 527-1)
EN ISO 527-2, Plastics - Determination of tensile properties - Part 2: Test conditions for moulding and
extrusion plastics (ISO 527-2)
EN ISO 4892-1, Plastics - Methods of exposure to laboratory light sources - Part 1: General guidance (ISO
4892-1)
EN ISO 4892-2, Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc lamps (ISO
4892-2)
EN ISO 6946, Building components and building elements - Thermal resistance and thermal transmittance -
Calculation method (ISO 6946)
EN ISO 10077-2, Thermal performance of windows, doors and shutters - Calculation of thermal transmittance
- Part 2: Numerical method for frames (ISO 10077-2)
EN ISO 10140-1, Acoustics - Laboratory measurement of sound insulation of building elements - Part 1:
Application rules for specific products (ISO 10140-1)
EN ISO 10140-2, Acoustics - Laboratory measurement of sound insulation of building elements - Part 2:
Measurement of airborne sound insulation (ISO 10140-2)
EN ISO 10140-4, Acoustics - Laboratory measurement of sound insulation of building elements - Part 4:
Measurement procedures and requirements (ISO 10140-4)
EN ISO 10140-5, Acoustics - Laboratory measurement of sound insulation of building elements - Part 5:
Requirements for test facilities and equipment (ISO 10140-5)
EN ISO 10211, Thermal bridges in building construction - Heat flows and surface temperatures - Detailed
calculations (ISO 10211)
EN ISO 11664-1, Colorimetry - Part 1: CIE standard colorimetric observers (ISO 11664-1)
EN ISO 11664-2, Colorimetry - Part 2: CIE standard illuminants (ISO 11664-2)
EN ISO 12017:1996, Plastics - Poly(methyl methacrylate) double- and triple-skin sheets - Test methods (ISO
12017)
EN ISO 12567-2, Thermal performance of windows and doors - Determination of thermal transmittance by hot
box method - Part 2: Roof windows and other projecting windows (ISO 12567-2)
EN ISO 13468-1, Plastics - Determination of total luminous transmittance of transparent materials - Part 1:
Single-beam instrument (ISO 13468-1)
EN ISO 13468-2, Plastics - Determination of the total luminous transmittance of transparent materials - Part 2:
Double-beam instrument (ISO 13468-2)
EN ISO 14125, Fibre-reinforced plastic composites - Determination of flexural properties (ISO 14125)
EN ISO 11925-2:2010, Reaction to fire tests - Ignitability of products subjected to direct impingement of flame
- Part 2: Single-flame source test (ISO 11925-2:2010)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
rooflight
building component used to introduce daylight which consists of a translucent part and associated edge
profiles, if applicable
3.2
translucent part
consists of at least an outside plastic skin and several additional translucent skins below optionally
Note 1 to entry: The additional skins can follow or be integrated with the outer skin or be an additional flat skin.
Note 2 to entry: Additional flat skin may not be in plastic.
3.3
upstand
element which is single- or multi-walled or composite with vertical and/or pitched walls; with or without thermal
insulation and having the two-fold purpose of providing an area for the fixture of plastic rooflights and for
connection to the substructure, the roof covering or the roof sealing
Note 1 to entry: The upstand transmits the loads acting upon the plastic rooflight into the substructure.
Note 2 to entry: Upstands may include ventilation devices.
3.4
accessories
connections, opening and locking devices and seals for the assembly of the elements (rooflight, translucent
part, upstand and edge profiile)
3.5
rooflight with upstand
building element which consists of at least the separate elements in accordance with rooflight, translucent
part, upstand and accessories
3.6
batch
quantity of material made in a single operation, or in the case of continuous production for a defined quantity
which shall be demonstrated by the producer to have a uniform composition
3.7
edge profile
any frame and/or profile necessary to fix and/or open the translucent part of the rooflight
Note 1 to entry: edge profiles can be made out of plastic materials.
3.8
junction part
any additional element (e.g. frame and/or profile) used with the edge profile to assemble the rooflight, when
made with more than one translucent part
Note 1 to entry: Junction part can be made out of plastic materials.
3.9
starting point of calculation
horizontal surface or point where adiabatic conditions are to be taken into account for calculation
Key
a single skin, solid sheet
b double skin, solid sheet
c triple skin, solid sheet
d multiwalled sheet
Note 1 to entry: In case of more than one skin, thicknesses of the sheets can be different.
Figure 3 — Cross sections of typical plastic sheets
4 Symbols and abbreviations
ΔYI
Change in the yellowness index
H Energy applied during ageing procedure
c
L
Light transmission of a test piece
s
L Light transmission of the nth test piece
sn
τ
Total luminous transmittance for the CIE-standard illuminant D in %
D65 65
M Average (see B.5.1) of R and R
s 1 3
M
Light transmission of the sample
v
R Thermal resistance in m ·K/W
R and R
Reading of galvanometer without any test piece
1 3
R Reading of galvanometer with the test piece
R
Airborne sound index in dB
w
U Heat transmittance in W/(m ·K)
YI Value of the yellowness index of aged test piece
YI Value of the yellowness index of unaged test piece
ΔE
Variation of E-modulus in %
Δσ Variation of strength in %
X Y Z Colourimetric coordinates
CIE, CIE, CIE
A Area of the outer exposed surface of the edge profile, in m
e
A The outer exposed surface of the junction part, in m
j
A The surface of the rooflight without upstand, in m
r
A The surface of the rooflight with upstand, in m
rc
A The surface of the rooflight without upstand of the reference model, in m
rc,ref
A The surface of the rooflight with upstand of the reference model, in m
rc,ref300
A Area of the outer exposed surface of the translucent part bordered with the perimeter of
t
the translucent part, in m
At,flat area of the horizontal projection of the clear opening of the translucent part of individual
rooflight, in m
Aup Area of the outer exposed surface of the rooflight upstand, in m
ee The width of the edge profile, in m
ee,h Horizontal distance between the upper outside border of the insulation and the clear
opening of the translucent part, in m
ee,v Vertical distance between the upper level of the translucent part and the upper level of the
upstand, in m
ej.h The width of the junction part, in m
eup The height of the upstand, in m
h Horizontal envelope boundary
k Factor to take into account the shape of the translucent part
l Length of the sealing of the edge profile, in m
e
l Length of the transition zone between translucent part and junction part, in m
j
l Length of the transition zone between translucent part and edge profile, in m
t
P Perimeter of the edge profile, in m
e
P Perimeter of the translucent part, equal to the perimeter of the clear opening of the
t
translucent part, in m
P The reference perimeter of the upstand
up
P Upper outer perimeter of the upstand, in m
up,u
P Lower outer perimeter of the upstand, in m
up,l
U
Thermal transmittance of the edge profile, in W/(m⋅K)
e
U Thermal transmittance of the junction part, in W/(m⋅K)
j
U Total thermal transmittance of rooflights including the edge profile, if applicable, in
r
W/(m⋅K)
U Total thermal transmittance of a rooflight without upstand (reference model), in W/(m⋅K)
r,ref
U Total thermal transmittance of rooflights including the edge profile, if applicable and
rc
upstand, in W/(m⋅K)
U Total thermal transmittance of a rooflight with upstand (300 mm height, reference model),
rc,ref300
in W/(m⋅K)
U Thermal transmittance of the translucent part, in W/(m⋅K)
t
U
Thermal transmittance of the upstand, in W/(m⋅K)
up
U Thermal transmittance of the upstand and the edge profile, if applicable, in W/(m⋅K)
up,e
v Vertical envelope boundary
Ψ
Linear thermal transmittance in the transition zone of edge profile and upstand, in W/(m⋅K)
e
Ψ Linear thermal transmittance in the transition zone of the translucent part and junction part,
j
in W/(m⋅K)
Ψ Linear thermal transmittance in the transition zone of the translucent part and edge profile,
t
in W/(m ⋅ K)
5 Requirements
5.1 Radiation properties
5.1.1 General
The radiation properties of individual rooflights shall be assessed when subject to regulatory requirement and
may be assessed voluntarily.
The radiation properties are essentially characterized by the light transmittance τ , the direct solar
D65
transmittance τ and the total solar energy transmittance g. The spectral characteristics of the transparent part
e
of an individual rooflight include the luminous and solar characteristics, and the reflection and transmission
characteristics.
The characteristics are as follows:
- the spectral transmittance τ(λ) and the spectral reflectance ρ(λ) in the wavelength range from 300 nm to
2450 nm;
- the light transmittance τ and the light reflectance ρ for standard illuminant D65;
D65 D65
- the solar direct transmittance τ and the solar direct reflectance ρ ;
e e
- the total solar energy transmittance (solar factor) g.
The characteristics are determined for quasi-parallel, near normal radiation incidence using the radiation
distribution of standard illuminant D65 (see EN 410:2011, Table 1), solar radiation in accordance with
EN 410:2011, Table 2 and ultraviolet (UV) radiation in accordance with EN 410:2011, Table 3.
The solar factor depends, as all other optical material characteristics, on the angle of incidence. The angle of
incidence should be taken into account for different sun positions.
5.1.2 Light transmission
The light transmission of the rooflight material is determined as total luminous transmittance of each skin and
possible combinations of skins in new plastic rooflights and is stated by the manufacturer according to 6.2.1.
The recorded τ value of the total luminous transmittance shall be within ± 5 % of the stated value.
D65
5.1.3 Solar direct transmittance τ
e
The solar direct transmittance of the rooflight material is determined as the solar transmittance of each skin
and possible combinations of skins in new plastic rooflights and is stated by the manufacturer according to
6.2.2.
The recorded τ value of the solar transmittance shall be within ± 5 % of the stated value.
e
5.1.4 Total solar energy transmittance g
The total solar energy transmittance, g, as defined in EN 410 shall be determined by calculation according
to 6.2.3 or by measurement according to 6.2.3.
The calculation method is applicable only to transparent parts with symmetrical on-plan cross-section.
Where the calculation method is not applicable, then the total solar energy transmittance shall be measured.
5.2 Durability
This characteristic shall be assessed when subject to regulatory requirements and may be assessed
voluntarily.
Durability of the product is evaluated by measuring the variation of total luminous transmittance, yellowness
index and mechanical properties after ageing procedure of the material of the translucent part with the same
energy level for the three following characteristics either on flat sheets and/or finished product. The ageing
procedure shall be conducted in accordance with 6.3.
5.3 Water tightness
This characteristic shall be assessed when subject to regulatory requirements and may be assessed
voluntarily. The plastic rooflight in the closed condition shall be tested in accordance with 6.4. No water shall
drop from the internal surface. The design of the rooflight shall ensure that water drains away externally.
5.4 Mechanical performances
5.4.1 Resistance to upward loads
This characteristic shall be assessed.
For the determination of the resistance to upward load the plastic rooflight shall be tested and classified in
accordance with 6.5.1.2.
A successful test is achieved if neither damage nor significant permanent deformation occurs.
5.4.2 Resistance to downward loads
This characteristic shall be assessed.
For the determination of the resistance to downward load the plastic rooflight shall be tested and classified in
accordance with 6.5.1.3.
A successful test is achieved if neither damage nor significant permanent deformation occurs.
5.4.3 Impact resistance
5.4.3.1 Small, hard body impact
This characteristic shall be assessed when subject to regulatory requirements and may be assessed
voluntarily.
A successful test is achieved when plastic rooflights are resistant to the impact of a small hard body when
tested in accordance with 6.5.2.1.
The products shall always be tested with the manufacturer's corresponding or specified upstand.
The identification of the tested assembly (the rooflight and the upstand) is part of the information
accompanying the declared performance.
5.4.3.2 Large soft body impact
This characteristic shall be assessed when subject to regulatory requirements and may be assessed
voluntarily.
For .the determination of the resistance to the impact of a large soft body the plastic rooflight shall be tested
and classified in accordance with 6.5.2.3.
The products shall always be tested with the manufacturer's corresponding or specified upstand.
The identification of the tested assembly (the rooflight and the upstand) is part of the information
accompanying the declared performance.
A successful test is achieved if neither the bag nor the gauge can pass through the specimen.
5.5 Reaction to fire
This characteristic shall be assessed when subject to regulatory requirements and may be assessed
otherwise.
The react
...