New Practice for Specifying Energy Absorbing Anchors for Blast Resistant Facade Elements
1. Scope
1.1 This practice covers energy absorbing anchors (EAA) used in exterior blast-resistant framed faade elements such as fenestration products that are glazed by glass or other infill materials and fenestration retrofit systems used in buildings that may be subjected to intentional or accidental explosions. 1.2 This practice specifies a method to correlate empirical test data and computational analysis to determine the required number of EAA to retain a faade element to its supporting structure for a given set of conditions. 1.3 This practice sets forth a method to determine, based on empirical test data and computational analysis, the load transfer from the EAA to the supporting structure. 1.4 This practice assumes that the EAA is used as a link between the blast-resistant faade element and the supporting structure. 1.5 This practice assumes that the EAA resistance in response to a blast load does not change along its usable range, hence, a single EAA imparted dynamic force is independent of the blast loading and the faade element characteristics. 1.6 This practice assumes that the EAA provides the structural strength for windload and any other required service loads. 1.7 This practice assumes that the full kinetic energy of a glazing protected by a fenestration retrofit system and exposed to a blast loading is transferred to the retrofit system stopping member. 1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.
Keywords
blast resistant; facade; glazing; energy absorbing anchors; fenestration; doors
