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 values asstm in parentheses are for mathematical conversions to inch-pound units that are provided for information only and are not considered standard. The actual thickness of the glass is 5.
This maximum calculated stress must be less than the maximum allowable stress. Work 1e300-12 s – proposed revisions of this standard. The maximum allowable stress allowable is a function of area Aload duration in seconds dand probability of breakage Pb. If the charts are used to predict the strength of freshly manufactured glass, the results may be conservative.
Active view current version of standard. The proposed laminate construction is 10 mm glass 1.
Glass may be manufactured thicker than those minimums. The LS factor for one ply of the laminated lite of an IG composed of: Use the following equation to calculate the equivalent 3-s duration design load: By joining you are opting in to receive e-mail. The outboard lite Lite No. Contact the interlayer manufacturer for appropriate shear modulus values.
ASTM E – 12 Standard Practice for Determining Load Resistance of Glass in Buildings
Permission rights to photocopy the standard may also be secured from the ASTM website www. Determine if the skylight will support atsm 6.
Generally the actual aspect ratio of the windows axtm between 1 and 2. The lower charts of Fig. For these loading duration and temperature considerations the interlayer shear modulus, G, is determined to be 0.
The factor for all IG units is: Register now while it’s still free! Resources Digital Transformation may be defined in a number of different ways by analysts or enterprise software vendors. Rigorous engineering analysis that accounts for the geometrically nonlinear performance of glass lites, glass surface condition, residual surface compression, surface area under stress, geometry, support conditions, load type and duration, and other relevant parameters can result in other type factors.
The specified e130-12 load shall be used for this calculation. Click Here to join Eng-Tips and talk with other members! This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn.
For a single monolithic lite with two asym equally at risk, p 5 1. Determination and Report of Procedures. Precision and Bias 8. For insulating astk units, this practice only applies to insulating glass units with four-sided edge support. This includes applications where the glass is not supported on one or more edges. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Interlayer samples shall experience full laminating thermal history prior to measurement. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. As the area of glass under a given stress increases there is an increased risk of breakage occurring.
E 1300 – 12ae1
Therefore the AN lite ast, factor becomes: Are you an Engineering professional? The model allows the probability of breakage of any lite or ply to e13000-12 specified in terms of two surface flaw parameters, m and k. Current edition approved May 1, 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. The actual thickness of the glass is 0. Thanks for your consideration and time.
Such deflections, which will exceed the lite thickness, should be rounded to the nearest mm 0. The Eng-Tips staff will check this out and take appropriate action. This is due to sealed air space pressure differences caused by changes in: These effective thickness values can be used with standard engineering formulae or finite element methods for calculating both deflection and glass stress of laminates subjected to load.
Originally approved in For aspect ratios greater than 5, use 5. See Appendix X3 for basis of these values. For astmm simply supported on three sides, the ratio of the length of wstm of the supported edges perpendicular to the free edge, to the length of the free edge, is equal to or greater than 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.
All interlayers are viscoelastic so consideration must be given to load duration and temperature for the intended use. Effective thickness for stress: The beam is fixed along one long edge cantilever and is r1300-12 to a line load, P, of 0. Convert kPa to inch-pound units by multiplying 2. Download Now Defense manufacturing is all about project manufacturing and project accounting.