1、E m ._ - L o Back-ventilated, non-loadbearing, external enclosures of buildings, made from tempered safety glass panels Requirements and testing 3 w - - DIN 18 516 Part 4 Auenwandbekleidungen, hinterlftet; Einschei ben-Sicherheitsglas; Anforderungen, Bemessung, Prfung In keeping with current practic
2、e in standards published by the International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker. Dimensions in mm Contents 1 Scope and field of application . 2 Tempered safety glass panels 2.1 General 2.2 Flexural strength . 2.3 Panel thickness 2.4 Panel
3、edges . 2.5 Panel testing 2.5.1 Elevated temperature test . . 2.5.2 Check for edge damage 3 Installation . 3.1 General 3.2 Panel fixings . Page . 1 . I . 1 . 1 . 2 . 2 . 2 . 2 . 2 . 2 . 2 . 2 Page . 3.3 Requirements for fixings .2 3.3.1 General .2 3.3.2 All-round retention 2 3.3.3 Retention on two o
4、r three sides 2 3.3.4 Localized retention 2 4 Design of panels 2 4.2 Design assumptions 3 3 5.1 General . 3 5.2 Determination of flexural strength 3 5.3 Determination of deformation. . 3 . 4.1 Permissible stresses 1 This standard, in conjunction with DIN 18 516 Part 1, speci- fies the design and con
5、struction of tempered safety glass back-ventilated exterior wall cladding). Scope and field of application 2 Tempered safety glass panels 2.1 General For the purposes of this standard, thermally toughened safety glass panels (safety glass panels, for short) shall be used for external wall cladding a
6、nd be produced from glass products complying with DIN 1249 Parts 1, 3 or 4. Surface coatingssuch as enamels, which may improve the properties of the glass, shall be permitted. 2.2 Flexural strength The flexural strength of tempered safety glass, as a func- tion of glass type, shall be as specified i
7、n table 1. See subclause 4.1 for permissible stresses in safety glass. Table 1 Panel material Minimum flexural strength), in N/mm2 Clear float glass Window glass, cast glass Glass with enamelling subject to tension I subject to compression 120 1) Defined as the minimum stress which resultsin a 5% pr
8、obability of failure at a confidence level of 95% (cf. DIN 13 303 Part 1). 1 I) Cf. DIN 1259 Part 2 for concept. Continued on pages 2 and 3 I I Beuth Verlag GmbH, Berlin. has the exclusive right of sale for German Standards (DIN-Normen). DIN 18 516 Part 4 Engl. Price group 4 12 94a Sales No 0104 Pag
9、e 2 DIN 18 516 Part 4 2.3 Panel thickness The panel thickness shall be determined by analysis, but shall not be less than 6mm. Cf. DIN 1249 Parts 1, 3 and 4 for tolerances on panel thick- ness. 2.4 Panel edges Panel edges shall be at least smoothed (cf. DIN 1249 Part ll), table 2 applying for the to
10、lerances on edge length. Table 2 Edge length 1 Limit deviations up to 1000 Over 1000 up to 1500 Over 1500 up to 2500 Over 2500 up to 3000 Over 3000 up to 3500 Over 3500 f1,5 f2 *2,5 43 f4 f5 2.5 Panel testing 2.5.1 Elevated temperature test The manufacturer shall condition all panels of one con- sig
11、nment at a mean oven temperature of (290 + 1O)“C for eight hours and shall issue a DIN 50049-2.1 or a DIN 50049-2.2 inspection document covering such testing. 2.5.2 Check for edge damage The edges of panels shall be checked for any damage which may have occurred after conditioning or during transpor
12、t or assembly. Panels with damaged edges may only be used if the damage does not penetrate the panel body by more than 15% of its thickness. 3 Installation 3.1 General Imposed stresses which arise where panels deviate from flatness need not be considered in the design of panels and supports. Deforma
13、tion caused by the background shall be estab- lished by means of analysis or assembly testing, in accor- dance with subclause 7.2 of DIN 18516 Part 1. 3.2 Panel fixings Fixings shall surroundor gripthe full thicknessof the panel. A distinction is to be made, as afunction of the design and arrangemen
14、t of fixings, between panels retained along their edges (linear retention) and at various points (iocai- zed retention). In the case of linear retention, the panel edges are usually secured in a metal surround, the panel then being fixed on not less than two sides. In the case of localized retention
15、, panels are fixed by means of clips or screws and clamping plates located at corners and, where further support is necessary, in the middle of the side lengths. 3.3 Requirements for fixings 3.3.1 General For all types of fixing, it shall be ensured that: a) edge clearance between rebate and panel i
16、s not less than 5mm; b) no contact occurs between glass and metal, glass and glass, or glass and exterior wall, even when the clad- ding is subjected to thermal effects or mechanical load- ing; c) the bedding is durabile, resistant to weather, and soft (usually elastomeric); d) panels are supported
17、under minimum stress. Where panels are supported on sealing strips, these shall be at least4 mm thick and located on both sides of the panel. 3.3.2 All-round retention In the case of panels retained on all sides, the depth of en- gagement shall be not less than 10mm. 3.3.3 In the case of panais reta
18、ined on two or three sides, the depth of engagement shall be equal to the panel thickness plus 1600th of the span, but not less than 15mm. Panels shall be prevented from slipping by means of spacer blocks, these usually being made of elastomers having a Shore A hardness of 60 to 80. Impressions in t
19、he panel caused by grips (e.g. at suspen- sion points) during prestressing, which reduce flexural strength, shall be located on a retained edge. Where the lower edge of a panel is not retained, the panel shall be provided with support at the lower left and right. The area of the contact surface, whi
20、ch is designed to ac- commodate the self-weight of the panel, shall be rectangu- lar and be at least equal to engagement depth times panel thickness. 3.3.4 Localized retention 3.3.4.1 In the case of localized retention, the contact sur- face area of clamps shall be at least 1000 mm2, the depth of pa
21、nel engagement being at least 25 mm. 3.3.4.2 Holders located on corners shall be rectangular (ratio of side lengths at least 1 : 2,5) and cover the whole corner. 3.3.4.3 Where the contact surface areas of clamps are smaller than those specified above, the loadbearing capa- city shall be verified by
22、means of assembly testing as spe- cified in subclause 7.2 of DIN 18 516 Part 1. For testing purposes, the panels and fixings shall be subjected to loading at right angles to the panel surface, to simulate suction and pressure. On the basis of at least ten tests, the cause of any type of failure (e.g
23、. failure of the fixing or fracture of the panel in the bearing zone), shall be deter- mined. 3.3.4.4 In the case of localized retention where the clamps are located at areas othei- than corners, fasteners (e.g. bolts fit into drilled holes) shall be provided. These may also be necessary to accommod
24、ate the self-weight of the panel 3.3.4.5 The distance between the edge of a bolt hole and the panel edge shall be equal to at least twice the panel thickness, but not less than the hole diameter. 3.3.4.6 The distances of holes drilled in the corner zone of a panel from its edge shall not be identica
25、l. Their differ- ence shall be at least 15mm. Retention on two or three sides 4 Design of panels 4.1 Permissible stresses Calculation of the permissible stresses for safety glass pa- nels shall be based on the minimum flexural strength as specified in table 1, using a safety factor of three, and if
26、necessary, taking a statistical evaluation of the results of assembly tests referred to in subclauses 3.3.4.3 and 5.3 into consideration. The permissible stresses determined on the basis of such tests shall not be greater than could be assumed in the case of a non-resilient background. DIN 18 516 Pa
27、rt 4 Page 3 The self-weight of panels shall be multiplied by a factor of 1,7 in the case of panels erected horizontally or at an angle of up to 85“ to the horizontal. 4.2 Design assumptions The design of safety glass panels shall be based on the following parameters: a) coefficient of thermal expans
28、ion of glass, ceT, equal to b) modulus of elasticity of glass, E, equal to 70 O00 N/mm2; c) a permissible deflection of the free edge of the panel and the centre of the panel, equal to f/lOO. 9 * K- ; 5 Testing 5.1 General Where compliance with the requirements has not been pro- vided by the manufac
29、turer in the form of a DIN 50 049-2.2 inspection document, flexural strength testing as specified in sublcause 5.2 shall be carried out by an accredited test house for each intended application. The results of such testing shall be coverd in a test certificate. 5.2 Determination of flexural strength
30、 The flexural strength of safety glass panels shall be deter- mined in accordance with DIN 52 303 Part 1. Test pieces shall be prepared in accordance with the principles of sta- tistical analysis (e.g. originating from different production days or different tempering ovens). The results of testing s
31、hall be statistically evaluated using the fifth percentile at a confidence level of 90%. For each panel thickness, the number of (randomly selected) sarn- ples, n, shall be not less than ten. 5.3 Determination of deformation Where assembly testing is necessary (cf. subclause 3.1), this shall be carr
32、ied out by a testing agency on the lines of DIN 18 516 Part 1, using the least favourable dimen- sions of the assembly, i.e. those which result in maximum deformation. Not less than three samples shall be thus tested. Standards referred to DIN 1249 Part 1 DIN 1249 Part 3 DIN 1249 Part 4 DIN 1249 Par
33、t 11 DIN 1259 Part 2 DIN 1303 Part 1 Glass for use in building construction; window glass; concept and dimensions Glass for use in building construction: clear float glass; concept and dimensions Glass for use in building construction; cast glass; concept and dimensions Glass for use in building con
34、struction; glass edges; concept, edge forms and workmanship Glass products; terminology Stochastics; probability theory; general principles of mathematical and descriptive statistics; concepts and symbols Back-ventilated, non-loadbearing, external enclosures of buildings; requirements and testing In
35、spection documents for the delivery of metallic materials Determination of bending strength of flat glass for use in building construction, with specimen sup- ported on both sides DIN 18 516 Part 1 DIN 50 049 DIN 52 303 Part 1 International Patent Classification E o4 B 2/88 C 03 C 27/12 E 04 C 2/54 E 04 F 13/14 E 06 B 3/00 G 01 N 33/38
