EN 15254-4:2008+A1:2011

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Razširjena uporaba rezultatov preskusov požarne odpornosti - Nenosilne stene - 4. del: Zastekljena konstrukcijaErweiterter Anwendungsbereich der Ergebnisse von Feuerwiderstandsprüfungen - Tragende Wände - Teil 4: Verglaste KonstruktionenExtension du champ d´application des résultats des essais de résistance au feu - Eléments non-porteurs - Partie 4: Constructions vitréesExtended application of results from fire resistance tests - Non-loadbearing walls - Part 4: Glazed constructions91.060.10Stene. Predelne stene. FasadeWalls. Partitions. Facades13.220.50Požarna odpornost gradbenih materialov in elementovFire-resistance of building materials and elementsICS:Ta slovenski standard je istoveten z:EN 15254-4:2008+A1:2011SIST EN 15254-4:2008+A1:2011en,fr,de01-december-2011SIST EN 15254-4:2008+A1:2011SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15254-4:2008+A1
July 2011 ICS 13.220.50; 91.060.10 Supersedes EN 15254-4:2008English Version
Extended application of results from fire resistance tests - Non-loadbearing walls - Part 4: Glazed constructions
Extension du champ d´application des résultats des essais de résistance au feu - Eléments non-porteurs - Partie 4: Constructions vitrées
Erweiterter Anwendungsbereich der Ergebnisse von Feuerwiderstandsprüfungen - Tragende Wände - Teil 4: Verglaste Konstruktionen This European Standard was approved by CEN on 15 December 2007 and includes Amendment 1 approved by CEN on 21 May 2011.
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.
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Examples for using this standard with regard to requested extended applications based on the reference test and previously existing test data . 21A.1 Examples for glass with E Classification based on Table A.1 . 21A.2 Examples for glass with EW Classification, based on Table A2 . 24A.3 Examples for glass with EI Classification based on Table A3 . 26SIST EN 15254-4:2008+A1:2011

Radiation calculations . 28B.1 Radiation calculations . 28B.1.1 General . 28B.1.2 Rectangular fire resistant glass panes or elements . 28B.1.3 Circular fire resistant glass panes or elements . 29B.1.4 Other shapes of Fire resistant glass panes or elements . 30Bibliography . 36 SIST EN 15254-4:2008+A1:2011

4.2.2 Use of previously existing test data Previously existing test data may be used to support extended application, for instance to evaluate the influence of a particular component (e.g. glazing material) or aspect of the design (e.g. direction of fire exposure) or to establish which design variations affect the performance in the most or least onerous way. If this can be identified, then a reference test on the most onerous design may be undertaken. If the product achieves the required classification then the other less onerous variations will be covered. The relevant clauses state when previously existing test data may be used. SIST EN 15254-4:2008+A1:2011

Glazing system
Change of glass type and thickness Replacement of glasses within the same glass product group 6.1 Symmetry of the glass construction Symmetric / asymmetric glasses 6.2 Rectangular panes Increase in pane area and aspect ratio 6.3
Circular and three- and (non-rectangular) four-sided glass panes Increase in area 6.4 Glass panes with EW classification Increase in area 6.5 Timber beads
Exchange of timber species / bead fixing / bead shape and dimensions 6.6 Metal beads Exchange of bead fixing / bead shape and dimensions 6.7 Exchange of glazing materials Gaskets/glazing strips / setting blocks 6.8 Bead surface coverings Changes or adding surface coverings 6.9
Framing system
Symmetry of the framing construction Symmetrical / asymmetrical frames 7.1 Exchange of frames (general)
Type of material / junction types / edge cover 7.2.1 Timber frames Thickness / profile / timber type (char rate / density) 7.2.2 Metal frames Frame materials / sections / thickness of chamber walls 7.2.3 Frame surface covering Changes or adding frame surface coverings 7.3 Supporting construction and fixing High density, low density, rigid, flexible 7.4 Fire resistant glazed element
Glazed elements classified to E or EI Increase in dimensions / area 8.1 Glazed element classified EW Increase in dimensions / area 8.2
Replication of whole element with EW classification 8.3 Installation angle Change in installation angle 8.4
Step 1 : Define the fire-resistant glazed element which is under consideration for EXAP - e.g. by detailed drawings, component description and specification
Step 2 : Characterise the fire performance limits of the Glazing System and Framing System - e.g. by reference test(s) in accordance with EN 1364-1, and where appropriate previously existing test data
2a Glazing System • Maximum glass pan area • Maximum individual pane dimensions
- in both height and width
Notes (1) & (2) 2b Framing System • At the desired maximum element size • Including all the desired frame junctions
- and measure total frame deflection
Notes (3),(4), (5)
Step 3 : Check compliance with general rules
- by reference to the general rules given in 5.1 and 5.2
Step 4 : Undertake extended application • Determine each individual extended application separately
- by reference to the specific rules given in 6, 7 and 8
Figure 1 — Methodology for determining the extended application of fire resistant glazed elements 4.2.3 Notes for Methodology in Figure 1 1: Define glass, bead type, fixings and glazing material, etc. 2: Maximum dimensions not necessarily established in the same pane (e.g. maximum height, maximum width, maximum area).
It is not allowed to combine dimensions from different panes. 3: Frame type to be the same as step 2a (e.g. material specification and fire performance). 4: Bead, fixing, glass and glazing material have to be the same as those in step 2a. 5: When the fire resistant glazed element to be considered is greater than 3 m × 3 m then the fire resistance test specimen has to be a minimum of 3 m × 3 m. SIST EN 15254-4:2008+A1:2011

For example, for a rectangular pane of height H1 = 2000 mm and width B1 = 1500 mm and another pane of height H2 = 2500 mm and width B2 = 1000 mm it is not allowed to apply an extension to a hypothetical pane of height H2 = 2500 mm and width B1 = 1500 mm because the area before extension is greater than either of the tested panels and the aspect ratio is not equivalent to either of the tested panels. 6 Specific changes to the glazing system 6.1 Exchange of the fire resistant glass The exchange (replacement) of the glass, as tested in the reference test, for another fire resistant glass is allowed, provided that it can be demonstrated that both glasses are within the same glass product group (same manufacturer) and have at least the same or increased nominal thickness. When the reference glass is being exchanged (replaced), the replacement glass (new glass) must have evidence that it achieves at least the same fire resistance classification (or equivalent fire resistance) as the reference glass (such as previously existing test data). If the replacement glass was tested (previously existing test data) at a smaller or the same size/area as in the reference test (before extension) then the size/area of the replacement glass cannot be changed from its tested size/area. If the replacement glass was tested at the same size/area as in the reference test (after extension) then this size/area of replacement glass can be used to replace the reference glass. SIST EN 15254-4:2008+A1:2011

The basis for the extension is the reference test. The width or height may be increased in accordance with equations 1 or 2 respectively. Where both width and height are increased the maximum extended area shall be in accordance with equation 3. wext ≤ wmax = wo × 1,20 (1) hext ≤ hmax = ho × 1,20 (2) Aext ≤ Amax = Ao × 1,21 (3) where wo , ho , Ao
is the width (m), height (m) and area (m2) of the tested pane;
wext , hext , Aext is the extended width (m), height (m) and area (m2) of pane;
wmax , hmax , Amax
is the maximum extended width (m), height (m) and area (m2) of pane. SIST EN 15254-4:2008+A1:2011

≥ 90 At least 10 % of the classification time a a For overrun times between 3 min and 6 min or 5 % and 10 % see explanation below (after equation 4)
The basis for the extension is the reference test. SIST EN 15254-4:2008+A1:2011

(4) where Ao is the area (m2) of the tested pane; Aext
is the extended area (m2) of pane; Amax is the max. extended area (m2) of pane. The extended pane shall be of the same orientation and shape as the tested pane. For the classification times 30 min/45 min/60 min, if the overrun time achieved in the reference test is 3 min or more but less than 6 min, the glass area can be increased according to equation 4. However, the increase in any dimension is restricted to a maximum of 50 % of the calculated increase using this equation. For the classification times ≥ 90 min, if the overrun time achieved in the reference test is 5 % or more but less than 10 %, the glass area can be increased according to equation 4. However, the increase in area is restricted to a maximum of 50 % of the calculated increase using this equation. It shall be confirmed in the extended application report that the framing system under consideration is able to support the additional weight due to the increased pane area. Furthermore, all of the relevant frame junctions shall have been tested in accordance with EN 1364-1 (see also Figure 2 in 7.2.1). 6.5 Individual panes in a wall: radiation For fire resistant glass with an EW classification the rules 6.1 to 6.4 apply together with the following. NOTE 1 For fire resistant glass with an EI classification, rules for determination of radiation do not apply. The radiation (W) shall be measured (in accordance with EN 1363-2) along the centre line at a distance of one metre from the centre of the test specimen. According to EN 13501-2, the radiation classification shall be determined by the time for which the measured radiation W0 does not exceed wmax as defined in Annex B. This is also applicable for the radiation value wext calculated for the pane with the extended area. For extended rectangular and circular panes wext can be calculated according to the following equation Wext= Wo × [ϕext/ϕ0] ≤ wmax (5) where the definition is given in Annex B. The basis for the extension is the reference test. The extension in area for EW classified glasses for all other shapes is allowed by the method described in B.1.4 which is based on the area of a rectangle prescribed around the shape. The relevant calculation shall be provided in the extended application report. NOTE 2 No equations currently exist for the calculation of radiation for the extended area for non-rectangular and non-circular shapes. NOTE 3 A radiometer as described in EN 1363-2 is not designed to measure the radiation from an individual pane within a multi-paned fire resistant glazed element. NOTE 4 The given limitations in Wext may also limit the extension of the area Aext of the fire resistant glass pane according to 6.3 or 6.4 or the W-classification will be lost. SIST EN 15254-4:2008+A1:2011

In all cases, exchange of timber species should be on the basis of density and/or comparative char rate tests (when available), calculations according to EN 1995-1-2 or reference values. These shall demonstrate that the fire performance of the replacement timber bead is either the same or better than that used in the reference test. If the beads in the reference test were fixed by nails, then screw fixing of similar length and distance is permitted as an alternative. However, a bead fixed by screws shall not be exchanged by a clipped or nailed bead unless this possibility has been shown to work, e.g. by previously existing test data. The bead height may be increased provided that increased edge cover on the glass can be demonstrated not to have a detrimental effect on its fire performance. The edge cover shall remain within the limits determined by the reference test or as determined by previously existing test data. A reduction of the bead height is not allowed. For EI classification of fire resistant glazed elements, exchange of the bead profile from a sloped or chamfered bead to a flat bead of the same height is allowed without further testing (see Figure B.2). For E and EW classified fire resistant glazed elements, exchange of the bead profile from a sloped or chamfered bead to a flat profile bead is not allowed unless suitably demonstrated by a reference test or previously existing test data. Exchange of a flat bead profile to a sloped or chamfered bead profile of the same height is allowed for all fire resistant glazed elements. But in this case the subsequent reduction in a bead cross section is only allowed where it can be demonstrated not to have a detrimental effect on the fire performance. Previously existing test data are allowed. Reduction in bead depth is only allowed if it can be demonstrated not to have a detrimental effect on the fire performance. Previously existing test data is allowed. The bead depth may be increased without restriction (see Figure B.3 item 7). NOTE the timber bead can have a major influence on the integrity performance of a timber-glazed system incorporating fire resistant glass with an E or EW classification. This is because it is possible for the timber bead to flame under the influence of radiation immediately adjacent to the glass surface on the side away from the fire. Charring of the timber also occurs at radiation intensities much less than those required to cause flaming. Fire resistant glazed elements with an EI classification significantly reduce the possibility of this occurrence by reducing the transmitted radiation directly at the glazing surface to low levels. 6.7 Exchange of metal glazing beads It is not allowed to exchange the type of material used for the glazing beads. Changes in bead shape are only allowed if it can be demonstrated not to have a detrimental effect on the fire performance. Previously existing test data is allowed. Clipped beads can be replaced by screw fixed or riveted beads but not vice-versa. Bead depth can be increased (see also Figure B.3, item 7). Reductions in bead depth are only allowed if it can be demonstrated not to have a detrimental effect on the fire performance. Previously existing test data are allowed. The bead height can be increased provided that the edge cover doesn't change or the increase in edge cover can be shown, e.g. by the reference test and/or by previously existing test data not to have a detrimental effect on the fire performance. SIST EN 15254-4:2008+A1:2011

But only if it can be demonstrated in the reference test and/or previously existing test data that the exchange does not have a detrimental effect on the fire performance within a comparable glazing system of the same glass product group. 6.9 Bead surface coverings Decorative surface coverings of the glazing beads may be exchanged, or added where one does not exist, provided it can be demonstrated that the covering material achieves at least Class A2 when tested according to EN 13501-1. In addition it must be shown that they do not adversely affect the fire resistance performance of the fire resistant glazed element, e.g. in the case of replacement coverings that provide a contribution to insulation.
If the surface covering is not Class A2 then it has to be proven in reference test data and/or previously existing test data that it does not negatively affect the fire performance. Any coverings on glazed elements classified EI shall be secured using only fixing method(s) proven in the reference test and/or by previously existing test data. 7 Specific changes to the framing system 7.1 Asymmetrical framing systems Fire resistance test evidence shall be provided, were required, for exposure to fire from both directions unless it can be determined which direction is the worst case. If this can be established, then only fire resistance test evidence for the worst case is required. In the absence of this fire resistance test evidence, the framing system shall only be used in the direction of fire exposure as tested. NOTE To demonstrate that the fire performance classification is unaffected by the direction of exposure, a reference test and/or supporting previously existing test data will be necessary. 7.2 Exchange of frames 7.2.1 General It is not allowed to exchange the type of material used to construct the frame (e.g. steel for timber or aluminium for steel). Frames can be manufactured using some or all of the junction types detailed below. But all the junction types considered in the extended application have to be covered in the reference test or previously existing test data. The extension allows the addition of junction types within the frame provided that it can be demonstrated by the reference test and/or from previously existing test data that the new junctions do not negatively affect the fire resistance.
test. 7.2.2 Timber frames In addition to the general rules given in 7.2.1 the following additional rules apply for timber frames. Exchange of the type of timber species used for the frame is allowed for fire resistant glass from the same glass product group as follows:  Timber with the same or higher density and/or moisture content, with the same or lower char rate and identical profile; SIST EN 15254-4:2008+A1:2011

EN 1364-1, or previously existing test data evidence may be used. Split timber frames (bolted, glued or nailed) shall be tested unless scaled drawings and representative frame sections can show that there is sufficient timber in the section such that the char line in the required period does not reach the bead fixings. Char data for the timber in question shall be provided to establish this point. At least one test to EN 1364-1 is also required or previously existing test data evidence can be used. 7.2.3 Metal frames In addition to the general rules given in 7.2.1 the following additional rules apply for steel and aluminium frames. Exchange of steel for steel frames, or aluminium for aluminium frames is allowed provided that: a) Substitute frame has the same material specification as that in the reference test as demonstrated by the appropriate characteristics of the frame (e.g. thermal expansion, thermal conductivity, melting point, strength). The specifications of the two framing systems shall be included in the extended application report for comparison. b) Substitute frame has the same fire performance as the frame in the reference test. This shall be demonstrated by reference to fire test data at the same classification time. Previously existing test data may be used. c) Deflection of the frame that is being considered in the extended application shall be no more than the measured deflection in the reference test. The deflection of this frame must either be known from previously existing test data or by theoretical calculation. If this data is not available or it is not possible to accurately calculate the deflection, then exchange is not allowed. d) Alternative frame has successful test evidence, which demonstrates that all the necessary design features (e.g. junctions, fixings) of the fire resistant glazed element under consideration can be constructed with the alternative frame without impairing the required fire performance in a test of the fire resistant glazed element. Previously existing test data may be used. e) In particular, the test report
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