In response to the 1933 Long Beach earthquake (California), the city of Los Angeles adopted the first earthquake design provisions enforced in the U.S., enacted by City Council under Ordinance No. 72,968 published September 6, 1933. The requirements included a design lateral base shear V = 0.08 W for regular use buildings, 0.10 W for school buildings and 0.04 W for the portion of a building above a flexible story. Building weight (seismic mass) was defined as W = Dead load + 0.5 Live load (except 1.0 Live for warehouses). Building frames were required to be designed to withstand at least 0.25V independent of any walls.