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ASME TR A17.1-8.4-2020 pdf free

ASME TR A17.1-8.4-2020 pdf free.Guide for Elevator Seismic Design.
For many years, U.S. and Canadian model building codes such as the Uniform Building Code (UBC), Standard (Southern) Building Code (SBC), and National Building Code of Canada (NBCC) differentiated the force levels expected during seismic activity by zones. For example, a building in a zone 1 location was expected to see lower seismic forces than a building in a zone 2 location. A United States Geological Survey (USGS) map of the U.S. (see Figure 1-2-1), published in the various building codes, indicated the appropriate zone for any part of the country.
Seismic requirements were first specified in ANSI/ ASME A17.1-1981, Appendix F. They were based on ANSI A58.1, the American National Standard Building Code Requirements for Minimum Design Loads in Buildings and Other Structures. Seismic force levels that the elevator must withstand would vary based on whether the subject building was in a zone 2 or zone 3 location. Zone 1 locations did not have elevator seismic requirements. Therefore, to determine elevator seismic forces for any part of the country, one would review the appropriate adopted building code for that particular location, determine the zone for that location from the seismic zone map used by that building code, and then reference the appropriate elevator forces for that zone in ANSI/ASME A17.1.
In the mid-1980s, the National Earthquake Hazard Reduction Program (NEHRP) published its Recommended Provisions for the Development of Seismic Regulations for New Buildings with new seismic maps from the USGS. Instead of using zones, these new contour maps desig nated seismic ground motion in terms of a velocityrelated coefficient, Ay. The ground motion parameter, in addition to other building variables, was input into an equation to determine seismic force levels for building structural (buildings) and nonstructural components(elevators, escalators, etc.). Throughout the late 1980s and 1990s, the model building codes [Building Officials and Code Administrators International, Inc. (BOCA),UBC, SBC] began adopting these new maps and variations of the NEHRP seismic force equation into their codes. In Canada, the 1985 edition of NBCC discarded Canada’s traditional seismic zones for seven seismic zones based on the velocity-related seismic zone parameter, Zv.ASME TR A17.1-8.4 pdf download.

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