EN 1873:2005

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prefabricated accessories for roofing - Individual roof lights of plastics - Product specification and test methodsAccessoires préfabriqués pour couverture - Lanterneaux ponctuels en matiere plastique - Spécifications des produits et méthodes d'essaisVorgefertigte Zubehörteile für Dacheindeckungen - Lichtkuppeln aus Kunststoff - Produktfestlegungen und PrüfverfahrenTa slovenski standard je istoveten z:EN 1873:2005SIST EN 1873:2006en91.060.20ICS:SLOVENSKI
STANDARDSIST EN 1873:200601-maj-2006

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1873December 2005ICS 91.060.20 English VersionPrefabricated accessories for roofing - Individual roof lights ofplastics - Product specification and test methodsAccessoires préfabriqués pour couverture - Lanterneauxponctuels en matière plastique - Spécifications des produitset méthodes d'essaisVorgefertigte Zubehörteile für Dacheindeckungen -Lichtkuppeln aus Kunststoff - Produktfestlegungen undPrüfverfahrenThis European Standard was approved by CEN on 4 September 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2005 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1873:2005: E

Guidelines for safety, application, use and maintenance.27 A.1 General.27 A.2 Guidelines for safety.27 A.3 Guidelines for application and use.27 A.4 Maintenance.28 Annex B (normative)
Alternative test method for the determination of light transmission.29 B.1 General.29 B.2 Apparatus.29 B.3 Test pieces.29 B.4 Procedure.30 B.5 Expression of results.30 Annex C (informative)
Information regarding luminous transmittance.31 C.1 General.31 C.2 Material characteristics.31 C.3 Transmission.32 C.4 Reflectance factor.32 C.5 Absorptance.32 C.6 Solar gain.33 C.6.1 General information.33 C.6.2 Illuminance.33 C.6.3 Solar factor.33 Annex ZA (informative)
Clauses of this European Standard addressing the provisions of the EU Construction Products Directive.35 ZA.1 Scope and relevant characteristics.35 ZA.2 Procedure(s) for attestation of conformity of roof lights.37 ZA.2.1 Systems of attestation of conformity.37 ZA.2.2 EC Certificate and Declaration of conformity.41 ZA.3
CE marking and labelling.43 Bibliography.47

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 roof light height Figure 1 — Typical individual roof lights

2a) Individual roof light without upstand
2b) Individual roof light with upstand
2c) Individual roof light 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 roof lights and upstands

Key a single skin, solid sheet b double skin, solid sheet c triple skin, solid sheet d structured sheet Figure 3 — Cross sections of typical plastic sheets 4 Symbols and abbreviations Cc Change in light transmission in % ∆YI Change in the yellowness index Hc Energy applied during ageing procedure Ls Light transmission of a test piece Lsn
Light transmission of the nth test piece τD65 Total luminous transmittance for the CIE-standard illuminant D65 in % Ms
Average (see B.5.1) of R1 and R3 Mv Light transmission of the sample R Thermal resistance in m²·K/W R1 and R3 Reading of galvanometer without any test piece R2 Reading of galvanometer with the test piece Rw Airborne sound index in dB

YCIE,
ZCIE Colourimetric coordinates 5 Requirements 5.1 Degree of total luminous transmittance (ττττD65) This characteristic shall be assessed when subject to regulatory requirements and may be assessed otherwise. The degree of total luminous transmittance of each skin and possible combinations of skins in new plastic roof lights shall be stated by the manufacturer when measured with a spectrophotometer according to 6.1 either on a flat specimen and/or a finished product. The recorded τD65 value of the total luminous transmittance shall be within ± 5 % of the stated value. NOTE Annex C presents information regarding the calculation of radiation related to energy consumption. 5.2 Durability 5.2.1 General Durability of the product is evaluated by measuring the variation of total luminous transmittance, yellowness index and mechanical properties after ageing procedure of the roof light material 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 6.2. 5.2.2 Variation of total luminous transmittance ττττD65 and yellowness index YI (∆∆∆∆YI) Plastic roof lights are classified in 9 types as given in Table 1.

The figures indicated for the change of total luminous transmittance τD65 refer to variation in percentage of the initial value. 5.2.3 Variation of mechanical properties with ageing The tensile strength and Young’s Modulus are properties of a material which can vary with age. Where required, the variation of the properties shall be determined by a bending test (or a tensile test) as defined in 6.2.4. The percentage reduction in Young’s Modulus, E, and tensile strength, 1, between new samples and samples aged to energy exposures (Hc) as described in Table 1, shall then be expressed in accordance with Tables 2 and 3. Table 2 — Material classification according to change of E-Modulus after ageing procedure at the same energy level Hc selected from Table 1 Type ûE % Cu 0 0 Cu 1 0 > ûE ≥ -10 Cu 2 -10 > ûE ≥ -20 Cu 3 -20 > ûE ≥ -30

≥ -10 Ku 2 -10 > ûσ
≥ -20 Ku 3 -20 > ûσ
≥ -30
5.3 Water tightness 5.3.1 Roof lights with upstand This characteristic shall be assessed when subject to regulatory requirements and may be assessed otherwise. The plastic roof light in the closed condition shall be tested in accordance with 6.3. No water shall drop from the internal surface. The design of the roof light shall ensure that water drains away. 5.3.2 Roof lights without upstand This characteristic shall be assessed when subject to regulatory requirements and may be assessed otherwise. The products covered by this European Standard are water impermeable provided that they are free of defects such as holes. The absence of such defects shall be checked by visual inspection of the finished product. 5.4 Mechanical performances 5.4.1 Resistance to upward loads This characteristic shall be assessed when subject to regulatory requirements and may be assessed otherwise. According to their resistance to upward loads, plastic roof lights are classified into one of the three types as given in Table 4. Table 4 — Types of upward loads Type Load N/m2 UL 1500 1 500 UL 3000 3 000 UL A a A a a The value of A can be selected to meet specific requirements.
The designations UL 1500, UL 3000 and UL A are representing the test upward load in N/m2 applied, when the roof light is tested in accordance with 6.4.1. When tested in accordance with 6.4.1, the plastic roof light shall be capable of resisting the test load.

The designations DL 750, DL 1175, DL 1750, DL 2500 and DL A are representing the test downward load in N/m² applied, when the rooflight is tested in accordance with 6.4.1. When tested in accordance with 6.4.1, the plastic roof light shall be capable of resisting the test load. A successful test is achieved if neither damage nor permanent deformation occurs which would affect the performance in use (e.g. watertightness, opening). 5.4.3 Impact load 5.4.3.1 Small, hard body This characteristic shall be assessed when subject to regulatory requirements and may be assessed otherwise. The product shall be tested in accordance with 6.4.2.1. Plastic roof lights shall be resistant to the impact of a small hard body. The products shall always be tested with the manufacturer's corresponding or specified upstand. NOTE The identification of the tested assembly (the roof light and the upstand) is part of the information accompanying the declared performance. 5.4.3.2 Large, soft body This characteristic shall be assessed when subject to regulatory requirements and may be assessed otherwise. The product shall be tested in accordance with 6.4.2.2. Plastic roof lights with upstands shall be classified according to Table 6. The products shall always be tested with the manufacturer's corresponding or specified upstand. NOTE The identification of the tested assembly (the roof light and the upstand) is part of the information accompanying the declared performance.

The designations SB 1200, SB 800, SB 600, SB 300 and SB A are representing the test impact energy in Joules applied, when the roof light is tested in accordance with 6.4.2.2. 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 product shall be tested using the test method(s) as referred to in and classified in accordance with EN 13501-1. Where required by a particular test method, and in addition to any specific requirements in that test method, the product shall be mounted and fixed for testing in a manner representative of its intended end use. 5.6 Resistance to fire This characteristic shall be assessed when subject to regulatory requirements and may be assessed otherwise. The product shall be tested using the test method(s) as referred to in and classified in accordance with EN 13501-2. Where required by a particular test method, and in addition to any specific requirements in that test method, the product shall be mounted and fixed for testing in a manner representative of its intended end use. 5.7 External fire performance This characteristic shall be assessed when subject to regulatory requirements and may be assessed otherwise. The product shall be tested using the test method(s) as referred to in and classified in accordance with prEN 13501-5. The products to be tested shall be installed, in addition to the general provisions given in the relevant test method, in a manner representative of their intended end use. When tested in accordance with ENV 1187:2002, test method 2, the materials shall be tested flat. NOTE This requirement is not applicable until prEN 13501-5 (or EN 13501-5) becomes available. The text is written like this to avoid the need for it to be changed after UAP.

=
18 min rain + 102 min dry; or where those facilities are not available, times of 9 min and 51 min, respectively, are allowed. The dimensions of the test samples shall be sufficient to be subsequently tested for light transmittance (see 6.2.2), yellowness index (see 6.2.3) and mechanical properties (see 6.2.4).

Key 1 nozzle Figure 4 — Test apparatus for water tightness

2,40 m ± 1%
for type SB 1200,
1,60 m ± 1%
for type SB 800,
1,20 m
± 1%
for type SB 600,
0,60 m
± 1%
for type SB 300, and
(A x 0,002) m
± 1%
for type SB A
above the impact point and drop the bag without initial velocity; f) test the impact strength at a point, which is determined as the most unfavourable point, located in an area between 0,5 m and 1,0 m from the outer edge of the roof light. If one size of the roof light is smaller than 1,0 m, carry out the test at the centre line; g) only one test shall be carried out on each roof light sample; h) examine the test specimen with
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