Welcome to Cal-Quake Construction

San Francisco Retroftting – the earthquake readiness experts. Here you will find useful information on earthquake readiness and earthquake retrofitting for your property.

Additionally, hints on how to prevent or limit damage to your property, and life saving tips to keep you, your property and lives safe. Servicing the entire State of California, the San Francisco Retroftting team has well over 150 years of combined experience preparing property for earthquakes and repairing earthquake damage.

Our staff engineers have better understanding of seismic retrofitting. They can determined through a visual inspection and make recommendations for strengthening, reducing the risk of damage to both property and occupants. Call us or book a retrofit inspection online today!

Our Services

Foundation Repair

During the inspection, the property and it’s surroundings are inspected for conditions that indicate prior or future seismic and/or foundation concerns.  more

Retrofit Certifications Inspections

Cal-Quake will inspect your property to make sure it is up to current city code.  If it is, we will issue a Retrofit Certification within 24 hours of inspection.   more

Home Bolting

Seismic retrofitting is a structural strengthening process that begins at the foundation and related to earthquake preparation and disaster mitigation. more

Soft Story Repair

Soft Story – Many properties, residential, commercial and apartment buildings have what is called a “soft story” condition. more

What is earthquake retrofitting?

Seismic retrofitting is the modification of existing structures to make them more resistant to seismic activity, ground motion, or soil failure due to earthquakes. With better understanding of seismic demand on structures and with our recent experiences with large earthquakes near urban centers, the need of seismic retrofitting is well acknowledged. Prior to the introduction of modern seismic codes in the late 1960s for developed countries (US, Japan etc.) and late 1970s for many other parts of the world (Turkey, China etc.),[1] many structures were designed without adequate detailing and reinforcement for seismic protection. In view of the imminent problem, various research work has been carried out. State-of-the-art technical guidelines for seismic assessment, retrofit and rehabilitation have been published around the world – such as the ASCE-SEI 41.

Earthquake and disaster preparedness kits

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