1、December 2010DEUTSCHE NORM Normenausschuss Bauwesen (NABau) im DINDIN-SprachendienstEnglish price group 9No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale
2、for German Standards (DIN-Normen).ICS 81.040.20!$zN“1888743www.din.deDDIN 18008-2Glass in building Design and construction rules Part 2: Linearly supported glazingsEnglish translation of DIN 18008-2:2010-12Glas im Bauwesen Bemessungs- und Konstruktionsregeln Teil 2: Linienfrmig gelagerte Verglasunge
3、nEnglische bersetzung von DIN 18008-2:2010-12Verre dans la construction Rgles de calcul et de la construction Partie 2: Vitrages fixation linareTraduction anglaise de DIN 18008-2:2010-12www.beuth.deDocument comprises 13 pages09.12 DIN 18008-2:2010-12 2 A comma is used as the decimal marker. Contents
4、 Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions . 4 4 Conditions for use . 4 5 Additional provisions for horizontal glazing 5 6 Additional provisions for vertical glazing . 5 7 Actions and verifications 6 Annex A (informative) Approximate method for the determination of c
5、limate loads and for the distribution of actions . 7 A.1 Calculation of the individual panes proportions aand iin the total bending stiffness . 7 A.2 Calculation of the characteristic edge length a* 8 A.3 Calculation of factor . 8 A.4 Determination of the isochoric pressure p09 A.5 Distribution of a
6、ctions . 9 Bibliography 13 Tables Table A.1 Factor BV8 Table A.2 Distribution of the actions 9 Table A.3 Proportion of the stiffness of individual panes in the total stiffness, and characteristic edge length 11 DIN 18008-2:2010-12 3 Foreword This standard has been prepared by Working Committee NA 00
7、5-09-25 AA Bemessungs- und Konstruktions-regeln fr Bauprodukte aus Glas of the Normenausschuss Bauwesen (NABau) (Building and Civil Engineering Standards Committee).*)DIN 18008, Glass in building Design and construction rules consists of the following parts: Part 1: Terms and general basics Part 2:
8、Linearly supported glazing Part 3: Point-fixed glazing1) Part 4: Additional requirements for barrier glazing1) Part 5: Additional requirements for glazing accessible for public1) Part 6: Additional requirements for glazing accessible for maintenance1) Part 7: Special structures1)*)Translators note.
9、This translation takes into account Corrigendum 1, issued in April 2011, which corrected Subclause 7.2. 1) in preparation DIN 18008-2:2010-12 4 1 Scope This part of DIN 18008, in combination with DIN 18008-1, applies to flat infill glazing supported on at least two opposite sides using mechanical fa
10、steners (e.g. clamping strips with screw connections), with the support being plane and continuously linear. Glazing which is also provided with point fixings (e.g. edge clamps and/or bolted connections through glass holes) is dealt with in DIN 18008-31). For glazing which can be walked on or driven
11、 on, which serves as balustrade or barriers or which is intended to be subject to hydrostatic loads (e.g. aquarium glazing), further requirements shall be taken into consideration. Depending on its vertical inclination, linearly supported glazing in the context of this standard is divided into horiz
12、ontal glazing: inclination 10 and vertical glazing: inclination 10. The provisions for horizontal glazing are also applicable to vertical glazing, provided this e.g. shed roofs with a potential for lateral snow loads is not only subject to short-term variable actions. 2 Normative references The foll
13、owing 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 (including any amendments) applies. DIN 1055-100:2001-03, Actions on structures Part 100: Bas
14、es of structural design Safety concept and design rules DIN 1259-1, Glass Terminology for glass types and groups DIN 1259-2, Glass Terminology of glass products DIN 18008-1:2010-12, Glass in building Design and construction rules Part 1: Terms and general bases DIN ISO 8930, General principles on re
15、liability for structures List of equivalent terms ISO 6707-1, Building and civil engineering Vocabulary Part 1: General terms 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 6707-1, DIN ISO 8930, DIN 1259-1, DIN 1259-2, DIN 1055-100 and DIN 18008-1 a
16、pply. 4 Conditions for use 4.1 The glass bite shall be chosen such that long-term structural stability of the glazing is ensured. Unless specified otherwise in the following, a minimum edge cover of 10 mm is required. 4.2 The linear support shall be bilaterally effective (for pressure and suction) o
17、n at least two opposite sides, normal to the plane of the pane. In the case of multiple layers, the linear support shall be effective for all panes. 1) in preparation DIN 18008-2:2010-12 5 4.3 An edge can be regarded as being supported in a plane and linear way if, relative to the supported length o
18、f the pane, the design value of the deflection of the substructure does not exceed 1/200. By way of simplification, the design value of the stress may be determined in accordance with DIN 1055-100:2001-03, Equation (22). 4.4 The glazing shall be professionally installed with setting blocks. 5 Additi
19、onal provisions for horizontal glazing 5.1 In the case of single glazing or the lower pane of insulating glazing, respectively, only laminated safety glass (LSG) made of float glass or of heat-strengthened glass (HSG) or wired glass may be used in order to protect public areas. 5.2 Drill holes and r
20、ecesses shall not result in a reduced residual load-bearing capacity. 5.3 LSG panes made of HSG may have drill holes for fixing clamping strips. 5.4 LSG panes with an effective span exceeding 1,2 m shall be supported on all sides. 5.5 The nominal thickness of the interlayer of LSG shall be 0,76 mm m
21、in. In cases of all-sided support of panes with an effective span of 0,8 m max. in the main supporting direction, an interlayer of nominal thickness 0,38 mm may also be used. 5.6 Using wired glass is only permissible up to an effective span of 0,7 m max. in the main supporting direction. In these ca
22、ses, the glass bite shall be 15 mm min. The edges of wired glass shall not be subject to persistent humidity. Free edges may be exposed to weathering, provided their drying is not inhibited. 5.7 The projection parallel and perpendicular to the support of the free edge of LSG beyond the area formed b
23、y the linear supports shall be 30 % max. of the supporting length but not more than 300 mm. A LSG pane shall not project beyond the laminate area (e.g. drip edges of overhead glazings) by more than 30 mm. 5.8 The performance of the lower pane of horizontal glazing made of insulating glass shall alwa
24、ys be verified with the load acting on the upper panes, including in the case of the upper panes failing. Failure of the upper panes is an “accidental” design situation. Here, DIN 1055-100:2001-03, 9.4 (Equation (15), applies. 5.9 Deviations from the additional provisions for horizontal glazing give
25、n in this clause are permitted if appropriate structural measures are applied (e.g. provision of small-meshed nets having a mesh size not exceeding 40 mm and with adequate long-term load-bearing capacity) and public areas are not endangered by falling glass parts. 6 Additional provisions for vertica
26、l glazing 6.1 Monolithic single glazing made of types of glass that break into large pieces (e.g. float glass, heat strengthened glass (HSG), drawn sheet glass, patterned glass) and laminated glass (LG), whose upper edge lies more than 4 m above any public areas, shall be supported on all sides. 6.2
27、 Monolithic single glazing made of fully toughened safety glass (TSG), whose upper edge lies more than 4 m above any public areas, shall be heat soaked toughened safety glass (TSG-H). This also applies to monolithic TSG in insulating glass units. DIN 18008-2:2010-12 6 7 Actions and verifications 7.1
28、 The verification of the ultimate limit state shall be performed in accordance with DIN 18008-1:2010-12, 8.3. NOTE The informative Annex A of this part of DIN 18008 contains an approximate method for flat rectangular double-pane insulating glass units linearly supported on all sides. For multi-pane
29、insulating glass units, a reference is given in the Bibliography at the end of this part of the standard 1. 7.2 When determining the resistance to stress failure, kc= 1,8 shall be used for annealed glass and kc= 1,0 for thermally toughened glass (HST, TSG). 7.3 The deflection of the glass panes shal
30、l be limited. By way of simplification, the design stress value may be determined in accordance with DIN 1055-100:2001-03, Equation (22). 1/100 of the effective span shall be taken to be the design value of the serviceability criterion. 7.4 Verifications in accordance with 7.3 may be omitted in the
31、case of vertical glazing, provided it can be demonstrated that, as a result of shortening of the axis, the minimum edge cover will never be less than 5 mm, even if the total shortening of the axis is assigned to just one support. By way of simplification, the design deformation value may be determin
32、ed in accordance with DIN 1055-100:2001-03, Equation (22). Attention is drawn to the possibility of higher requirements for deflection limitation being set by the manufacturers of the insulating glass units. 7.5 Given an installation height of up to 20 m above ground level as well as normal producti
33、on and installation conditions of the insulating glass units (i.e. DIN 18008-1:2010-12, Table 3, is applicable), vertical glazing made of double- or triple-pane insulating glass which is subject only to wind, self-weight and climatic actions, may be used without the need for further verification, pr
34、ovided the following conditions are met: glass product: float glass, HSG, TSG/TSG-H or LSG made of the before-mentioned types of glass area: 1,6 m2 thickness of the pane: 4 mm difference in the thickness of the pane: 4 mm cavity: 16 mm characteristic value of the wind load: 0,8 kN/m2NOTE However, if
35、 the length of the shorter edge of annealed float glass panes falls below 500 mm (double-pane insulating glass) or 700 mm (triple-pane insulating glass), the breaking risk due to climatic actions increases. DIN 18008-2:2010-12 7 Annex A (informative) Approximate method for the determination of clima
36、te loads and for the distribution of actions For flat rectangular double-pane insulating glass units linearly supported on all sides, the proportion of load transfer by the outer and the inner panes and the actions due to climatic changes can be taken into consideration as follows for small deformat
37、ions. NOTE A general method for the determination of climate loads and the distribution of external loads in the case of double- and triple-pane insulating glass is given, e.g., in 1. A.1 Calculation of the individual panes proportions aand iin the total bending stiffness 3i3a3aaddd+= (A.1) where ai
38、s the stiffness factor of the outer pane (%); dais the thickness of the outer glass pane (mm); diis the thickness of the inner glass pane (mm). a3i3a3ii1 =+=ddd(A.2) where iis the stiffness factor of the inner pane (%);ais the stiffness factor of the outer pane (%);dais the thickness of the outer gl
39、ass pane (mm); diis the thickness of the inner glass pane (mm). DIN 18008-2:2010-12 8 A.2 Calculation of the characteristic edge length a* ( )4V3i3a3i3aSZR9,28*Bddddd+=a (A.3) where a* is the characteristic edge length (mm); ais the stiffness factor of the outer pane (%); iis the stiffness factor of
40、 the inner pane (%); dais the thickness of the outer glass pane (mm); diis the thickness of the inner glass pane (mm); dSZRis the distance between the panes (cavity) (mm); BVis a factor. Factor BVis given in Table A.1 as a function of the aspect ratio a/b. Table A.1 Factor BV a/b 1,0 0,9 0,8 0,7 0,6
41、 0,5 0,4 0,3 0,2 0,1 BV0,019 4 0,023 7 0,028 8 0,035 0 0,042 1 0,050 1 0,058 7 0,067 6 0,076 7 0,085 7 NOTE The values have been calculated on the basis of Kirchhoffs plate theory for G= 0,23. By way of approximation, the values may also be used for G= 0,20. Intermediate values can be determined by
42、linear interpolation.where BVis a factor; a is the smaller edge length of the insulating glass unit (mm); b is the larger edge length of the insulating glass unit (mm); Gis the Poissons ratio of glass. Values of a* for common insulating glass unit assemblies are given in Table A.3 as a function of t
43、he aspect ratio a/b. A.3 Calculation of factor 4*)/(11aa+= (A.4) where is a factor for the determination of climate loads acting on insulating glass units; a* is the characteristic edge length (mm); a is the smaller edge length of the insulating glass (mm). DIN 18008-2:2010-12 9 A.4 Determination of
44、 the isochoric pressure p0The isochoric pressure p0in the cavity (i.e. the pressure present when the volume is kept constant) results from the changes in the climatic conditions as follows: p0= pgeo pmet+ 0,34 kN/(K m2) T (A.5) NOTE The change in the atmospheric pressure pgeodue to changes in altitu
45、de H may be determined by approximation, using the relationship pgeo= 0,012 kN/m3 H. where p0is the isochoric pressure (kN/m2); pgeois the change in atmospheric pressure due to changes in altitude (kN/m2);pmetis the change in atmospheric pressure due to changes in meteorological conditions (kN/m2);
46、T is the temperature change (K); H is the difference in altitude (m). A.5 Distribution of actions The distribution of the actions and of the effect of the isochoric pressure on the outer and the inner panes can be applied in accordance with the information given in Table A.2. Table A.2 Distribution
47、of the actions Load acting on Action Proportion of load acting on outer pane Proportion of load acting on inner pane outer pane wind wa(a+ i) wa(1 )i wasnow s (a+ i) s (1 )i s inner pane wind wi(1 )a wi(a+ i) wiboth panes isochoric pressure p0 p0+ p0The directional arrow pointing from the “outside”
48、to the “inside” is defined as the positive direction for the purposes of Table A.2. DIN 18008-2:2010-12 10 Key 1 wind pressure 2 deformation 3 positive pressure 4 negative pressure Figure A.1 Examples: Wind pressure (a), positive or negative pressure, respectively (b) NOTE In the case of LSG and LG for individual panes (1, 2, ), the effective thickness d* shall be regarded as the glass th
