Pre-fabricated Special Moment Frames installed in existing structures to resist lateral earthquake forces.
Whether required by an ordinance, or chosen to increase the resiliency of a building, MiTek Shear Wall Systems provide solutions.
Some buildings will require retrofit by 2017
For San Francisco, according to the Structural Engineers Association of Northern California the USGS predicts that there is a 63% chance another large earthquake will strike San Francisco in the next 30 years. “The intensity is expected to rival those of the 1989 Loma Prieta Earthquake.”
It is estimated that 43% to 85% of soft-story buildings will be uninhabitable following a major earthquake, potentially displacing 58,000 residents, 2,000 businesses, and 7,000 employees.
13,500 Buildings will be affected
4 cities have adopted soft-story retrofit ordinances
As of today, these following cities have adopted soft-story retrofit ordinances that require building owners to make improvements: San Francisco, Berkeley, Oakland, and Los Angeles. There is already talk about other California cities adopting similar laws.
Cities are directly notifying the building owners of their obligations under the new laws, and those names and addresses are a matter of public record, should entrepreneurial contactors want to market their retrofit services.
It is estimated in L.A., that upwards of 13,500 buildings may need code-approved retrofits.
Geological conditions and historical earthquakes help us to identify and classify high seismic zones. Earthquakes such as the 1987 Whittier, 1989 Loma Prieta, 1994 Northridge, and 2001 Nisqually, Washington have caused extensive damage to thousands of wood-framed homes. The resulting damage has helped to advance new products and methods that improve the structural integrity of buildings.
After years of study, code officials in the San Francisco Bay Area and in Los Angeles have recently adopted ordinances that require soft-story seismic retrofits. The purpose is to prevent loss of life, to mitigate possible building collapse and to avoid the inhabitants being displaced from a condemned building.
Why MiTek Special Moment Frames?
The MiTek Special Moment Frame is a state-of-the-art, pre-fabricated, pre-engineered system that utilizes the new-generation SidePlate® moment connection technology to resist lateral forces from high wind and earthquake loads.
The Special Moment Frame is pre-assembled and welded at the factory, then delivered to the job site ready to install in new construction or existing structures as a retrofit to improve the buildings ability to resist earthquake forces for better safety and damage control.
- Approved by AISC’s Connection Preapproval Review
- Panel (CPRP) in AISC 358 Prequalified Moment Connection Standard.
- Meets code – third party agency evaluation for alternate materials is not required.
- Lateral bracing of the beam is not required.
- Standardized sizes with Pre-engineered designs for easy specification.
- Custom Moment Frame designs available.
- For use in residential, commercial and industrial.
- An ideal solution for soft-story retrofits.
Pre-fabricated for easy installs to save time and money.