Los Angeles high rise accelerograph requirement?

- All high-rise buildings in the city of Los Angeles with a height of 75 feet or more must be equipped with at least one accelerograph on the roof.

- The accelerograph must be capable of recording the acceleration of the building in three directions (x, y, and z) at a sampling rate of at least 100 Hz.

- The accelerograph must be calibrated and maintained according to the manufacturer's specifications.

- The accelerograph data must be recorded and stored in a secure location for at least 90 days.

- The accelerograph data must be made available to the city of Los Angeles upon request.

These requirements are in place to help ensure the safety of high-rise buildings in Los Angeles in the event of an earthquake. By monitoring the acceleration of buildings during earthquakes, engineers can identify potential weaknesses and make necessary repairs to mitigate the risk of collapse.