Standard Practice for Determining Load Resistance of Glass in Buildings

Importancia y uso:

6.1 This practice is used to determine the LR of specified glass types and constructions exposed to uniform lateral loads.

6.2 Use of this practice assumes:

6.2.1 The glass is free of edge damage and is properly glazed.

6.2.2 The glass has not been subjected to abuse.

6.2.3 The surface condition of the glass is typical of glass that has been in service for several years, and is weaker than freshly manufactured glass due to minor abrasions on exposed surfaces.

6.2.4 The glass edge support system is sufficiently stiff to limit the lateral deflections of the supported glass edges to no more than ¹/₁₇₅ of their lengths. The specified design load shall be used for this calculation.

6.2.5 The deflection of glass or support system, or both, shall not result in loss of glass edge support. The glass bite reduction or pullout shall be considered using the method referenced in (1).3

Note 2: Glass deflections are to be reviewed. This practice does not address aesthetic issues caused by glass deflection.

Note 3: This practice does not consider the effects of deflection on insulating glass unit seal performance.

Note 4: The designer/engineer must determine what constitutes sufficient glass edge support based on Annex A1, Non-Factored Load Charts.

6.3 Many other factors shall be considered in glass type and thickness selection. These factors include but are not limited to: thermal stresses, spontaneous breakage of tempered glass, the effects of windborne debris, excessive deflections, behavior of glass fragments after breakage, blast, seismic effects, building movement, heat flow, edge bite, noise abatement, and potential post-breakage consequences. In addition, considerations set forth in building codes along with criteria presented in safety-glazing standards and site-specific concerns may control the ultimate glass type and thickness selection.

6.4 For situations not specifically addressed in this standard, the design professional shall use engineering analysis and judgment to determine the LR of glass in buildings.

Subcomité:

E06.52

Referida por:

E0997-15R21, F2248-19, C1048-18, E3401_E3401M-24, C1401-23, E0330_E0330M-14R21, E1233_E1233M-14R21, E2461-22

Volúmen:

04.11

Número ICS:

81.040.30 (Glass products)

Palabras clave:

annealed glass; deflection; flat glass; fully tempered glass; glass; heat-strengthened glass; insulating glass; laminated glass; load resistance; monolithic glass; probability of breakage; snow load; soda lime silicate; strength; wind load;