The ELF procedure is the most widely used simplified method for regular, low-to-mid-rise structures. It models the seismic event as a static lateral force applied to the base of the structure. Calculated using the formula: V=CsWcap V equals cap C sub s cap W Cscap C sub s is the seismic response coefficient and is the effective seismic weight of the structure. Response Modification Coefficient (
Understanding ASCE 7-05 Seismic Provisions: A Comprehensive Guide asce 7-05 seismic pdf
SDS=23SMScap S sub cap D cap S end-sub equals two-thirds cap S sub cap M cap S end-sub The ELF procedure is the most widely used
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