Before revision: The right one is equipped with a seismic base isolation LA City Hall, the world's tallest building to be retrofitted with base isolation Seismic base isolation, also known as base isolation, or base isolation system, is one of the most popular means of protecting a structure against earthquake forces.
After revision: The right one is equipped with a seismic base isolation LA City Hall, to be retrofitted with base isolation Seismic base isolation, also known as base isolation, or base isolation system, is one of the most popular means of protecting a structure against earthquake forces.