Livermore, CA
4771 Arroyo Vista Avenue
Scope/Solutions
The one-story commercial building at 4771 Arroyo Vista Avenue is a concrete tilt-up structure with a panelized wood-framed roof built in the late 1980s. Prior to purchasing the property, Black Mountain Properties commissioned another consultant to perform a due diligence survey that identified seismic vulnerabilities and recommended partially upgrading the roof-to-wall connections. Black Mountain Properties engaged SGH to design a voluntary retrofit.
SGH designed a retrofit to upgrade the roof-to-wall anchorage and improve the building’s seismic performance, allowing the new owner to avoid earthquake insurance. Highlights of our work include:
- Providing the owner with retrofit options for varying levels of seismic performance
- Recognizing that the concrete strength of the tilt-up walls, which was not available, could significantly influence the retrofit design
- Reducing the required scope of work by incorporating existing wall anchorage components into the anchorage design and executing a concrete testing program per ASCE 41 to determine the actual concrete strength
- Developing alternate strengthening for the roof-to-wall connections to avoid disrupting a tenant’s continuous food processing operations.
Designing a complete wall anchorage system to comply with ACSE 41 and costing less than the other consultant’s original estimate for a partial retrofit
1 of 5
Project Summary
2022
Completion Date
390K
Construction Value
71K
Project Size
Solutions
New Construction
Services
Structures | Applied Science & Research
Markets
Commercial
Client(s)
Black Mountain Properties
Specialized Capabilities
Seismic Engineering | Repair & Strengthening | Physical Testing
Key team members
Additional Projects
West
Williams-Sonoma at Union Square
Once known as Bullock & Jones men’s clothier, this 18,000 sq ft cast-in-place concrete building was reconstructed after the 1906 San Francisco earthquake. Williams-Sonoma wanted to create a dramatic effect with a new central atrium, which required major modifications to the existing structure.
West
100 Montgomery (Formerly 120 Montgomery)
Constructed in 1955, the twenty-five story 100 Montgomery office building is considered a historically-significant structure in downtown San Francisco and is distinguished by its white marble facade and Art Deco window framing.