The Pros and Pros of retrofitting:
For Apartment Owners:
One procedure in seismic retrofitting is accomplished by attaching the wood frame to the concrete foundation by using either anchor bolts or metal plates. This procedure is known as House Bolting and Foundation Repair or Upgrade. The hardware that is used is determined by the amount of room under the home or apartment.
Another technique in retrofitting is the bracing or shearing of a cripple wall. The wall is two-by-four studs that rise up above the foundation with the structure resting upon it. Without retrofitting, many buildings are seismicly weak, and with great lateral force they can easily collapse.