Seismic Bolting Living in the Greater Los Angeles, Pasadena Area where many earthquake fault lines exist. Homes need to be properly bolted and braced. Most homes built in the late 1970s and older are braced with nails only. These homes need to be seismic retrofitted, by bolting and bracing to resist the ground motion from earthquakes. When the inspector for Pasadena Property Inspection.com. Do an inspection this is just one aspect of many we look for when inspecting a home.