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BS EN 14024:2023

BS EN 14024:2023

$198.66

Metal profiles with thermal barrier. Mechanical performance. Requirements, proof and tests for assessment

Published By Publication Date Number of Pages
BSI 2023 66
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This document specifies requirements for assessment of the mechanical strength of metal profiles incorporating a thermal barrier having mechanical performance depending on their intended use. It also specifies the tests to determine the characteristic values of mechanical properties of the thermal barrier profile and to assess the effect of different conditionings of the thermal barrier on the mechanical performance of the connection. This document does not apply to thermal barriers which do not give a contribution to the mechanical resistance of the profiles. This document is applicable to thermal barrier profiles designed mainly for windows, doors, screens and curtain walls. This document does not apply to thermal barriers made only of metal profiles connected with metal pins or screws. This current edition of EN 14024 will supersede EN 14024:2004. Differences in test procedures between the two versions will not lead to significant differences in test results. Therefore, existing test results according to EN 14024:2004 are considered as equivalent to new test results according to the current edition of EN 14024.

PDF Catalog

PDF Pages PDF Title
2 undefined
6 European foreword
7 1 Scope
2 Normative references
8 3 Terms and definitions
Table 1 — Temperature categories and test temperature
Figure 1 — Schematic diagram of mechanical design systems
9 Figure 2 — Examples of mechanical design systems Type B
10 Figure 3 — Examples of geometric design type 1 (symmetrically loaded profile)
11 Figure 4 — Examples of geometric design type 2 (nearly symmetrically loaded profiles with eccentricity α = a/b ≤ 5)
12 Figure 5 — Examples of geometric design type 3 (asymmetrically loaded profiles with eccentricity α = a/b > 5)
13 Figure 6 — Examples of geometric design type 4 (non-symmetrically loaded profiles)
14 4 Symbols and abbreviations
18 5 Requirements
5.1 General
19 Figure 7 — Transfer of the self-weight of the infill element to the vertical profile by mechanical means
5.2 Thermal barrier with mechanical functions
20 5.3 Mechanical resistance
21 Table 2 — Mechanical properties to be evaluated by testing
23 5.4 Static proof
6 Tests
6.1 General
6.1.1 Test specimens
6.1.2 Test temperature
6.1.3 Mechanical test equipment
6.1.4 Pre-test conditioning
24 6.2 Effects of different conditionings of the thermal barrier on the mechanical performances of the connection
6.2.1 Generalities
6.2.2 Performance after immersion in water
6.2.3 Performance after exposure to humidity
6.2.4 Testing for brittleness
25 6.2.5 Testing of the creep factor under constant shear load
6.2.6 Testing of the creep factor under constant transverse tensile load
6.2.7 Performance after exposure to UV radiation (if applicable)
26 6.2.8 Testing for tensile cracks
6.3 Transverse tensile strength (Q)
6.3.1 Test specimens
27 6.3.2 Test procedure
28 Figure 14 — Side view and front view of a test device (schematic) for determining the transverse tensile strength
6.3.3 Evaluation
6.4 Shear strength and elasticity constant (T, c)
6.4.1 Test specimens
29 6.4.2 Test procedure
30 Figure 15 — Schematic side view (a) and top view (blow up) (b) of the testing device to determine shear strength and elasticity constant
6.4.3 Result types of systems with mechanical design system type A
31 Figure 16 — Schematic view on a metal profile with thermal barrier under load
32 6.4.4 Test flow
Figure 17 — Schematic flowchart for testing shear strength T and elasticity constant c
6.4.5 Special cases
6.4.5.1 Case 1
33 Figure 18 — Schematic side view (a) and top view (blow up) (b) of the testing device for special case number 1
6.4.5.2 Case 2 (double insulating zone)
35 Figure 19 — Schematic side view (a) and top view (blow up) (b) of the testing device for special case number 2
6.4.6 Evaluation
36 6.5 Ageing
6.5.1 General
6.5.2 Method 1 = M1
6.5.2.1 Test method
37 Figure 20 — Test device (schematic) for aging method 1
6.5.2.2 Evaluation
Figure 21 — Method 1 Measurement of the remaining deformation Δh for M1
6.5.3 Method 2 = M2
6.5.3.1 Test method
6.5.3.2 Mechanical load cycle
38 6.5.3.3 Temperature cycle
Figure 22 — Test device (schematic) for ageing method 2
Figure 23 — Method 2 – Load cycle
39 Figure 24 — Method 2 – Temperature cycle – 12 h
6.5.3.4 Evaluation
Figure 25 — Method 2 Measurement of the remaining deformation f for M2
6.5.4 Method 3 = M3
6.5.4.1 General
6.5.4.2 Test method
40 6.5.4.3 Evaluation
6.6 Characteristic values
6.6.1 Transverse tensile strength
6.6.2 Characteristic shear strength
6.6.3 Elasticity constant
6.6.4 Residual deformation Δh for M1 and deformation f for M2
6.6.5 Ageing effect, creep factor φc,s under constant shear load
41 6.6.6 Ageing effect, creep factor φc,t under constant transverse tensile load
6.6.7 Combined shear and tensile stress, design-factor γRd
6.7 Test report
6.7.1 General
42 6.7.2 Test report on effects of different conditionings of the thermal barrier on the mechanical performances of the connection
Table 3 — Effects of different conditionings of the thermal barrier on the mechanical performances of the connection
6.7.3 Test report on the mechanical resistance of the profile
Table 4 — Characteristic values to be reported
44 Annex A (informative) Static proof
A.1 Actions
45 A.2 Profiles without shear connection (type C)
A.2.1 Flexural stress
Table A.1 — Table of requirements for the Ultimate Limit State
46 Table A.2 — Suggested (not compulsory) partial load factors for windows, doors and curtain walls framing members
47 Table A.3 — Suggested (not compulsory) load combination factors ψ for windows, doors and curtain walls framing members
A.2.2 Transverse tensile strength
A.2.3 Deflection
48 Table A.4 — Table of requirements for the Serviceability Limits States
49 A.2.3.1 Maximum limits on frontal deflection
A.2.3.2 In plane deflection
A.3 Profiles with shear connection (types A and B)
A.3.1 General
50 A.3.2 Metal profile sections
A.3.3 Shear strength of the thermal barrier
51 A.3.4 Transverse strength of the thermal barrier
A.3.5 Deflection
52 Annex B (informative) Extension of characteristic data for profile design
B.1 General
B.2 Shear strength T and transverse tensile strength Q
B.3 Elasticity constant c, creep factor φc,s
53 Figure B.1 — Schematic representation of thermal barriers
54 Annex C (informative) Effective momentum of inertia of metal profiles with thermal barrier
55 Figure C.1 — Load bearing performance of metal-plastic compound profiles in the case of : (a) an ideally rigid compound; (b) and (c) an elastic compound; (d) a loose compound in terms of shear stress.
57 Figure C.2 — Schematic representation of the position of the axes through the centre of gravity and the moment of inertia of a compound profile and of the profile shells
58 Figure C.3 — Simply supported beam loaded with a uniformly distributed load
59 Figure C.4 — Simply supported beam subjected to a uniformly distributed temperature load
62 Annex D (informative) Simple products which typically do not need a static proof by calculation
D.1 General
D.2 Simple product definition
63 Figure D.1 — Typical thermal barrier profiles of windows, doors, and secondary constituent parts of curtain walls that can be verified according to the Annex D
D.3 Mechanical properties
D.3.1 General
D.3.2 Condition 1
D.3.3 Condition 2
64 D.4 Static proof
Table D.1 — Effective moment of inertia Ieff of the assembled profile
65 Bibliography

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BS EN 14024:2023
$198.66