4771 Arroyo Vista Avenue

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