1、BRITISH STANDARD BS EN 14024:2004 Incorporating Corrigendum No. 1 Metal profiles with thermal barrier Mechanical performance Requirements, proof and tests for assessment The European Standard EN 14024:2004 has the status of a British Standard ICS 91.060.10; 91.060.50 BS EN 14024:2004 This British St
2、andard was published under the authority of the Standards Policy and Strategy Committee on 13 October 2004 BSI 18 November 2004 ISBN 0 580 44590 9 National foreword This British Standard is the official English language version of EN 14024:2004. The UK participation in its preparation was entrusted
3、by Technical Committee B/538, Doors, windows, shutters, hardware and curtain walling, to Subcommittee B/538/1, Windows, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Additional information The adoption of this B
4、ritish Standard introduces a range of test criteria to assess the suitability of the thermal barrier material incorporated within metal profiles, which has not previously been covered by British Standards. Thermal barriers containing existing polyurethane products, as used in the UK for the past 25
5、years, may therefore not meet the ageing procedure requirements given in Clause 5, Method 1, Method 2 and Method 3. These products are likely to continue to be present in the marketplace but may not be able to conform to the requirements of this standard. It is expected that products conforming to t
6、his standard will become available in the UK following the possible citing of this standard in the revisions of: Building Regulations Approved Document L1 Conservation of fuel and power in dwellings; and Building Regulations Approved Document L2 Conservation of fuel and power in buildings other than
7、 dwellings expected to be published in 2005/2006. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “S
8、earch” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal
9、 obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Sum
10、mary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 29 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 15432 18 November
11、 2004 National foreword amendedEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN14024 October2004 ICS91.060.10;91.060.50 Englishversion MetalprofileswiththermalbarrierMechanicalperformance Requirements,proofandtestsforassessment Profilsmtalliquesrupturedepontthermique PerformancesmcaniquesExigences,
12、preuveetessais pourvaluation MetallprofilemitthermischerTrennungMechanisches LeistungsverhaltenAnforderungen,Nachweisund PrfungenfrdieBeurteilung ThisEuropeanStandardwasapprovedbyCENon29July2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisE
13、urope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherla
14、nguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland
15、,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexpl
16、oitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN14024:2004:EEN 14024:2004 (E) 2 Contents page Foreword4 1 Scope 5 2 Normative references 5 3 Terms, definitions and symbols.5 4 Requirements.8 4.1 General8 4.2 Material of the thermal barrier9 4.3 Mechanical resistance.9
17、 4.4 Static proof .10 5 Tests11 5.1 General11 5.2 Suitability of the thermal barrier material .11 5.3 Transverse tensile strength (Q)12 5.4 Shear strength and elasticity constant (T, c)13 5.5 Ageing.15 5.6 Characteristic values.18 5.7 Test report 20 Annex A (informative) Static proof .22 Annex B (in
18、formative) Extrapolation of characteristic data.25 Annex C (informative) Effective momentum of inertia of thermal barrier profiles 27 Bibliography 29 Figures Figure 1 Schematic diagram of mechanical design systems.6 Figure 2 Examples of geometric design types .7 Figure 3 Transfer of the self-weight
19、of the infill element to the vertical profile by mechanical means.9 Figure 4 Side view and front view of a test device (schematic) for determining the transverse tensile strength 13 Figure 5 Test device for determining shear strength and elasticity constant (schematic).14 Figure 6 Test device (schem
20、atic) for ageing method 116 Figure 7 Method 1: Measurement of the remaining deformation.16 Figure 8 Test device (schematic) for ageing method 217 Figure 9 Method 2: Load cycle.17 Figure 10 Method 2: Temperature cycle (12 h)18 Figure 11 Method 2: Measurement of the remaining deformation.18 Figure B.1
21、 Schematic representation of thermal barriers 26 EN 14024:2004 (E) 3 Figure C.1 Schematic representation of profile with thermal barrier .27 Tables Table 1 Characteristic values for mechanical resistance.10 Table 2 Ageing procedure15 Table 3 Suitability of the thermal barrier material 20 Table 4 Cha
22、racteristic values to be reported .21 EN 14024:2004 (E) 4 Foreword This document (EN 14024:2004) has been prepared by Technical Committee CEN/TC 33 “Doors, windows, shutters, building hardware and curtain walling”, the secretariat of which is held by AFNOR. This European Standard shall be given the
23、status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2005, and conflicting national standards shall be withdrawn at the latest by April 2005. This text includes a Bibliography. According to the CEN/CENELEC Internal Regulations, the natio
24、nal standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Por
25、tugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14024:2004 (E) 5 1 Scope This document specifies requirements for assessment of the mechanical strength of metal profiles incorporating a thermal barrier. It also specifies the tests to determine the characteristic values o
26、f mechanical properties of the thermal barrier profile and to assess the suitability of the thermal barrier material used. This document applies to thermal barrier profiles designed mainly for windows, doors, window walls and curtain walls. It does not apply to thermal barriers made only of metal pr
27、ofiles connected with metal pins or screws. Thermal barrier profiles are used in various fields of applications and demand a differing assessment of their mechanical performance depending on their intended use. This document takes this into account by two fields of application: one for windows, door
28、s and related components and one for profiles in faades. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (incl
29、uding any amendments) applies. EN ISO 4600, Plastics Determination of environmental stress cracking (ESC) Ball or pin impression method (ISO 4600:1992). 3 Terms, definitions and symbols For the purposes of this document, the following terms, definitions and symbols apply. 3.1 thermal barrier profile
30、 profile composed of two or more metal sections connected by at least one thermally insulating (non-metallic) part NOTE 1 The thermal barrier contributes to load transmission. NOTE 2 The thermal barrier can be continuous or in parts. 3.2 Use categories 3.2.1 category W thermal barrier profiles mainl
31、y designed for windows, doors and secondary constituent parts of curtain walls NOTE Thermal barrier profiles designed for windows and doors do not usually require proof by calculation for mechanical resistance. 3.2.2 category CW thermal barrier profiles mainly designed for the constituent parts of c
32、urtain walls with spans greater than 2,25 m NOTE Constituent parts of curtain walls usually need proof by calculation relating to mechanical resistance and deflection. EN 14024:2004 (E) 6 3.2.3 temperature categories two temperature categories, defined and to be chosen according to the intended use
33、Temperature category Low test temperature LT High test temperature HT TC 1 (-10 2) C (70 3) C TC 2 (-20 2) C (80 3) C NOTE Temperature category TC 2 includes temperature category TC 1. 3.3 Mechanical design systems 3.3.1 type A system system which is designed to transfer shear and in which shear fai
34、lure will not negatively affect the transverse tensile strength 3.3.2 type B system system which is designed to transfer shear and in which shear failure will negatively affect the transverse tensile strength 3.3.3 type O system system which is designed to transfer no shear to the thermal barrier or
35、 profile which has an insufficient shear strength a) Type A system b) Type B system c) Type O system Key 1 Thermal barrier 2 Metal Figure 1 Schematic diagram of mechanical design systems EN 14024:2004 (E) 7 3.4 Geometric design types 3.4.1 type 1 profile profile in which the load is symmetric (see F
36、igure 2a) or near to symmetry, i.e. the eccentricity of the load a/b does not exceed the value 5 (see Figure 2b) and c) 3.4.2 type 2 profile profile in which the load is asymmetric, i.e. all profiles not covered by type 1 (see Figure 2d), e), f) and g) a) symmetrically loaded profile (type 1) b) and
37、 c) near symmetrically loaded profiles with eccentricity a/b 5 (type 1) d) and e) asymmetrically loaded profiles with eccentricity a/b 5 (type 2) f) and g) non-symmetric profiles (type 2) Key 1 Thermal barrier profile 2 Infill elements (i.e. glass or panels) 3 Line load Figure 2 Examples of geometri
38、c design types EN 14024:2004 (E) 8 3.5 Symbols and indexes Symbol Meaning Unit Q transverse tensile strength N/mm T shear strength N/mm c elasticity constant N/mm l length of the test specimen mm f deformation mm h deformation mm F force N A 1design factor for type B A 2creep factor Indexes c charac
39、teristic value which has a 95% chance of being exceeded based on a logarithmic normal distribution with 75% confidence N new, before artificial ageing M1 after artificial ageing, method 1 M2 after artificial ageing, method 2 M3 after artificial ageing, method 3 mean mean value req required max maxim
40、um LT low temperature RT room temperature HT high temperature 4 Requirements 4.1 General For assessing the shear depending on the thermal barrier systems, three types A, B and O (see 3.3) shall be distinguished. Because of the intrinsic safety of type A, shear and tensile strength may be considered
41、independently, whereas type B requires an assessment under superposition of loads. The transverse tensile strength of type A and type O shall be determined after simulated shear failure. For type O only the transverse tensile strength shall be determined, no shear strength and elasticity constant wi
42、ll be given. Permanent loads which stress the thermal barrier are not covered by this document with the following exceptions: a) the tension (transversal tensile stress) caused by conventional glazing systems with preformed seals; EN 14024:2004 (E) 9 b) in the case of type A or type B systems the sh
43、ear stress in the vertical profile caused by the self-weight of the infill element. The transfer of the load from the horizontal profile to the vertical profile by mechanical means is required (see Figure 3). a) horizontal profile section b) front view of a frame Key 1 Self-weight of infill element
44、2 Mechanical means (mechanical edge connection) 3 Transferred self-weight Figure 3 Transfer of the self-weight of the infill element to the vertical profile by mechanical means 4.2 Material of the thermal barrier Thermal barrier composed of non-metallic materials, e.g. PA or PU based systems or impr
45、oved synthetic materials, shall be tested in accordance with 5.2. The aim of the test procedures is to assess the thermal barrier material independently of the shape of the thermal barrier and of the profile design. Materials used for the thermal barrier shall conform to the following requirements:
46、a) the characteristic value of transverse tensile strength after immersion in water (see 5.2.2) or after exposure to humidity (see 5.2.3) shall correspond to Q reqgiven in Table 1 depending on the category of use. The decrease of the characteristic value shall not exceed 30 % as compared to Q c N at
47、 the corresponding temperature; b) customary window and facade cleaning agents or cutting and drilling oils shall not cause tensile cracks (see 5.2.4); c) exposure to sudden stress (see 5.2.5) shall not cause decrease in characteristic value of transverse tensile strength of more than 30 % as compar
48、ed to Q c N RT . 4.3 Mechanical resistance Depending on the category of use of the profile and the type of the thermal barrier system (geometry and technology) the characteristic values of the mechanical resistance shall conform to the requirements of Table 1. EXAMPLE Q c M1 LT Q req in category CW means that the characteristic transverse tensile strength after ageing method 1 determined at low temperature LT should be not less than 20 N/mm. EN 14024:2004 (E) 10 Table 1 Requirements
