Seismic Retrofitting

Seismic Retrofitting

The first stage of seismic retrofitting is addressing the foundation. In the event of an earthquake, a home or building that has not been retrofitted can either slide, rack or overturn off its foundation. In California, the earth is constantly moving as a result of seismic activity. At any moment, your home, or building is one earthquake away from severe structural damage or even worse, a complete collapse. Seismic retrofitting involves modifying existing structures, so that they are more resistant to seismic activity. Foundation Technology is the retrofitting leader in Los Angeles, California. Call (661) 294-1313 to speak with one of our retrofitting experts today and take the first step towards protecting what matters most in the event of an earthquake.

Why Seismic Retrofitting Can’t Wait

A home or building that has not been retrofitted can either slide, rack or overturn off its foundation.


A large earthquake can cause structural collapse, bringing an entire home, or building to the ground. Seismic retrofitting can ensure the safety of family members in your home, or staff, tenants and customers in your place of business.


In the event of an earthquake, the probable maximum loss (PML) is lower on a seismic retrofit property. Therefore, buyers will regard the property a more valuable asset, and lenders will view as a more secure investment.


Whether it’s tenants having to relocate, loss of assets, decreased productivity, or ceased operations, the destruction caused by an earthquake can reduce, or even halt an organization’s profits.


If a property has a substandard safety plan, it’s likely the owner will be plagued by litigation at some point in time. Seismic retrofitting will drastically reduce the vulnerability to lawsuits that result from injury, death, loss of wages, or loss of housing.


Most cities in California, including Los Angeles, have ordinances that mandate property owners to retrofit their homes, buildings, or structures. Failure to comply can result in penalties ranging from large fines to a shutdown of business operations.


Solid safety plans are rewarded with reduced insurance premiums. A seismic retrofit substantially reduces the costs of damage from an earthquake. It also demonstrates good faith in trying to protect a building and its occupants.

Our Retrofitting Solutions


Improves the connection between the wood framing of a structure and its concrete foundation. In the event of an earthquake, foundation bolting decreases the likelihood of your home or building to slide, shift or move off its foundation. Application involves bolting a piece of wood, known as the sill or mill plate, from the structure into the concrete foundation. The type of foundation plates, plate washers, and bolts used, whether expansion or epoxy-set, are determined by the current conditions of the home or building and it’s foundation.


A cripple wall is a short, wood-framed wall that extends from the top of the concrete foundation to the bottom of the main floor in the crawlspace. The most common cause of earthquake related failure is a cripple wall collapse. Bracing the cripple wall is critical to preventing a collapse in the event of an earthquake. First, exterior siding is applied to cover and strengthen the cripple wall. Metal bracing, a sill plate, and brackets are bolted and glued with epoxy to secure the cripple wall to the foundation. Plywood sheer paneling is then applied to reduce sway.


An adjustable, support system used in crawl spaces to stabilize floor joists or beams. It’s common for the floors of a home or building to fail amid shaking caused by an earthquake. The crawl space pier system is the most effective solution to prevent collapse. Installation starts by placing a precast concrete base into a fill in the ground. The adjustable, heavy duty steel pier is then secured to both the concrete base and to the bottom of the beams or joists to provide support. If at any point the ground beneath the concrete base sinks, or the floor starts to sag, the adjustable pier can lift the floor back to a level position.