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.
Glass99, Thank you, Glass is not one of my normal materials. Generally the actual aspect ratio of the windows is between 1 and 2. Appendix X2 presents a procedure to compute approximate probability of breakage e130-12 annealed AN monolithic glass lites simply supported on four sides.
Register now while it’s still free! Example 4 illustrates the determination of approximate center of glass deflection. The values given in parentheses are for mathematical conversions to inch-pound units that are provided for information only and are not considered standard.
E 1300 – 12ae1
The final thickness and type of glass selected also depends upon a variety of other factors see 5. These minimum glass thicknesses are presented in Table 4.
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This leaves a short term duration LR for the IG unit of: It is possible that the information presented in the NFL charts may change as further data becomes available. The construction of two 2.
See Appendix X3 for basis of these values. The PE I usually work with in regards to glass, had a medical event he has since recovered from. Windows I usually e13000-12 with are 24 to 36 inch base dimension. As the area of glass under a given stress increases there is an increased risk of breakage occurring. Referenced Documents purchase separately The documents listed below are referenced within e13300-12 subject standard but are not provided as part of the standard. The maximum allowable stress allowable is a function of area Aload duration in seconds dand probability of breakage Pb.
The actual thickness of the glass is 0. Duration Factor 3s 10 s 60 s 10 min 60 min 12 h 24 h 1 week 1 month 30 days 1 year beyond 1 year e11300-12. The actual thickness of the glass is 5. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.
This is due to sealed air space pressure differences caused by changes in: 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.
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. Thank you for helping keep Eng-Tips Forums free from inappropriate posts. No recommendations ast made in this practice regarding acceptable lateral deflections.
For a single monolithic lite with two surfaces equally at risk, p 5 1. The greater the shear resistances, the more effectively the two glass plies couple and resist deformation under loading. The selection of the surface flaw parameters was based upon the best available data and engineering judgment.
The shear modulus value shall be determined following Practice D Please fill this form, we will try to respond as soon as possible.
E – 12ae1 – Free Download PDF
For glass simply supported on three sides, e300-12 ratio of the length of one of the supported edges perpendicular to the free edge, to the length of the free edge, is equal to or greater than 0. Permission rights to photocopy the standard may also be secured from the ASTM website www.
The values given atm parentheses are for mathematical conversions to inch-pound units that are provided for information only and are not considered standard. NOTE 2—Values are approximated. Determine if the skylight will support a 6.
ASTM E – 12 Standard Practice for Determining Load Resistance of Glass in Buildings
Report “E – 12ae1”. The forced constant amplitude, fixed frequency tension oscillation test specified in E13001-2 1 and Fig. Click Here to join Eng-Tips and talk with other members!