PAGE 1 OF One of the design requirements of glass used in buildings is to resist the loads created by wind and snow. ASTM E to the French and ASTM standard, that in some cases admit a lower design thickness for glass, then for the same . NF P  ASTM E – Glass strength evaluation prior to ASTM E Twelve U.S. glass thickness designations were covered from millimetre to millimetre.
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The beam is fixed along one long edge cantilever and is subjected to a line load, P, of 0. This practice shall not apply to other applications including, but not limited to, balustrades, glass floor panels, aquariums, structural glass members, and glass shelves. The forced constant amplitude, fixed ashm tension oscillation test specified in Table 1 and Fig. For insulating glass units, this practice only applies to insulating glass units with four-sided edge support.
Appendix X1 provides additional procedures to determine maximum lateral deflection for glass simply supported on four sides. The question in specifics is in regards to the caution stated in X1.
E 1300 – 12ae1
All interlayers are viscoelastic so consideration must be given ee1300-12 load duration and temperature ast the intended use. This practice assumes that 1 the supported glass edges for two, three, and four-sided support conditions are simply supported and free to slip in plane; 2 glass supported on two sides acts as a simply supported beam; and 3 glass supported on one side acts as a cantilever.
Current edition approved May 1, Example 4 illustrates the determination of approximate center of glass deflection. Active view current version of standard. NOTE 4—The user is recommended to limit the combined width of both air spaces in the IG unit to less than or equal to 25 mm 1 in. Size px x x x x The NFL is thus found to be 2. Your comments will receive careful consideration atsm a meeting of the responsible technical committee, which you may attend. For these loading duration and temperature considerations the interlayer shear modulus, G, is determined to be 0.
All loads are considered normal to the glass surface. These effective thickness values can be used with standard engineering formulae or finite r1300-12 methods for calculating both deflection and glass stress of laminates subjected to load.
The windows are being checked for wind loads only. The lower charts of Fig.
ASTM Ea – Glass engineering – Eng-Tips
Typical load duration-temperature combinations for design purposes are: We need your help to maintenance this website. Use Vallabhan and Chou 1 for alternate method. Defense manufacturing is all about project manufacturing and project accounting. Please copy and paste this embed script to where you want to embed Embed Script. Click Here to join Eng-Tips and talk with other members! The load sharing is then based on the individual ply thicknesses of the LG.
Your comments are invited either for revision of this standard or for additional standards and should be addressed asstm ASTM International Headquarters. Please help us to share our service with your friends. The values given in parentheses are for mathematical conversions to inch-pound units that are provided for information only and are not considered standard.
Therefore the AN lite probability factor becomes: Substituting into Eq X9. Will this window glass support a 1. For glass simply supported on three sides, the ratio of the length of one of the supported edges perpendicular to the free edge, to the length of the free asttm, is equal to or greater than 0.
It’s easy to join and it’s free. NOTE 1—This practice does not address aesthetic issues caused by glass deflection. This practice assumes that 1 the supported glass edges for two, three, and four-sided support conditions are simply supported and free to slip in plane; 2 glass supported on two sides acts as a simply ashm beam; and 3 glass supported on one side acts as a cantilever. The greater the shear resistances, the more effectively the two glass plies couple and resist deformation under loading.
The intent of Appendix X9 is to provide a method that allows the user to perform engineering analysis of e130-012 X9.
Generally the actual aspect ratio of the windows is between 1 and 2. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. If the sum of all interlayer thicknesses is greater than 1.