Larger imageCladding on this store in Anchorage failed in the 1964 Alaska earthquake.

Source: Joseph Rychemik, courtesy of EERC

The Problem

The cladding on the outside of some buildings can sustain damage and even fall off if it does not allow the building to flex when the ground shakes. Precast concrete cladding, with or without stone facing, is heavy. The steel connections holding it to the building must be strong enough to allow the building to move in an earthquake without failing.

In addition, gaps or joints between cladding units must be large enough and in the right places to accommodate building movement.

How to Identify

Engage a qualified engineer or architect to help you evaluate the condition of cladding and its ability to allow for earthquake movement.

The Solution

Poor connections can be strengthened or replaced. You will need to hire a qualified engineer or architect.

Larger imageThe sign on this commercial building fell in the 1979 Imperial Valley Earthquake.

Source: Bob Reitherman

Larger imageSimple retrofits can prevent signs from falling.

Source: FEMA Publication 74