Technical Library

Technical Aspects of Retrofitting a House

Seismic retrofitting requires a good understanding of the kinds of damage that occurs in earthquakes, familiarity with tests done by seismic hardware manufacturers, and the performance qualities of plywood, nails, concrete, and steel. Retrofitting requires an understanding of building codes, both current and older.  Below you will find a series of articles and test reports for seismic retrofit contractors, engineers, and homeowners alike. /p>

ACQ and shear wall construction
Earthquake Resistance of Old Buildings
As built plans
Balloon Framing
Regional Guidelines
Building Codes
Design Procedures
The problem with porches
Design a Retrofit for a House on a Flat Lot
Design a Cripple Wall Retrofit
Design a Retrofit for a Bolted House on a Flat Lot
Foundation Bolts
Foundations and Rebar
Useful Hardware
Hardy Frames
Foundation Bolts and Over-sized Holes
Horizontal Hold Down Hillside Anchors
Weights of Houses
Lag Bolt Shear Transfer Ties
What to do with Over-Driven Nails
The Science of Plywood Nailing
Research Report 138-High Capacity Shear Walls
ESR 1539 Non-Conventional Shear Wall Construction
Center Foundation Retrofits
Retrofit with only Three Foundations
Rotation and Soft Story Retrofits
Repairs when the Floor has been Repaired with Plywood
Shear Transfer Diaphragm
Shear Transfer Ties
Shear Wall Blocking
Unusual Qualities of Stucco
Shear Wall Framing
Over-Driven Nails in Plywood
Shear Wall Repairs with Sheet Metal
Shear Walls Built Off the Side of a Foundation
Foundation Bolts, Characteristics and Capacities
Simpson StrongWalls
Slant Nailed Plywood
Engineering Basis of Standard Plan A
Nailing Patterns for Stepped Shear Walls
Wood Straps are Better than Steel
The Performance of Drywall in Earthquakes
The Post to Beam Connection
The Importance to Top Plate Connections in Cripple Wall Retrofits
Foundation Capping
Old Foundation Tests by the Structural Engineer’s Association
Square Bearing Plate Washer
The Qualities of Wood published by the American Wood Council
Shear Wall Repair Methods


Bay Area Retrofit
427 San Pablo Ave
Albany, CA 94706
Field offices in San Jose & Hayward


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License Info

Works' Comp RWCC64393236
Contractors Lic #558462
Bond #SC6334450
Liability Ins PCA 1045011
Link to Contractor's License Board