In California, what is the minimum required embedment depth for anchor bolts connecting wood sill plates to concrete foundations?
Correct Answer
A) 7 inches
CBC Section 2308.3.3 requires anchor bolts connecting wood sill plates to concrete foundations to have a minimum embedment depth of 7 inches. This California requirement ensures adequate pullout resistance for seismic forces and is critical for the load path from the structure to the foundation system.
Why This Is the Correct Answer
CBC Section 2308.3.3 requires anchor bolts to be embedded a minimum of 7 inches into concrete foundations. This depth provides adequate pullout resistance so the bolt can transfer the seismic uplift and shear forces from the sill plate into the foundation without the bolt pulling out under load.
Why the Other Options Are Wrong
Option B: 9 inches
9 inches exceeds the minimum code requirement and is not the standard prescribed depth. While deeper embedment would add pullout capacity, the code minimum is 7 inches for standard prescriptive residential construction.
Option C: 12 inches
12 inches is well beyond the required minimum. This depth might be used in engineered or heavily loaded conditions but is not the CBC prescriptive standard for sill plate anchor bolts.
Option D: 5 inches
5 inches of embedment is insufficient. At this shallow depth, the bolt would be vulnerable to pullout under the lateral and uplift forces generated by a major seismic event, compromising the structural load path.
Memory Technique
Seven inches of embedment — think of the 7 as an anchor sinking deep into the concrete, seven inches down. '7-inch anchor = 7 letters in ANCHORS.' The bolt is buried 7 inches to hold the house to the earth.
More trade-general-building Questions
When installing engineered lumber joists (I-joists) in California residential construction, what is the primary code requirement for web stiffeners?
What is the required attic ventilation ratio when a vapor retarder is installed on the warm-in-winter side of the ceiling according to the California Residential Code?
In California's Wildland-Urban Interface (WUI) areas, which underlayment requirement applies to Class A fire-rated roof assemblies?
In California, when installing a tankless water heater in a seismic zone, what additional requirement must be met beyond standard installation practices?
According to the California Building Code (CBC), what is the minimum lap splice length for #4 rebar in a concrete foundation wall in normal weight concrete with f'c = 3000 psi?
According to CBC requirements for retaining walls in California, what additional design consideration must be addressed for retaining walls over 4 feet in height located in seismic design categories D, E, and F?
When constructing retaining walls in California that exceed 4 feet in height, which CBC requirement must be met regarding drainage?
Under California regulations, when is a reduced pressure principle (RPP) backflow prevention assembly required for a residential water service connection?
Under California Title 24, what is the minimum electrical service size required for new single-family residential construction?
According to the California Building Code, buildings located in Seismic Design Category D must comply with which specific seismic design requirements?
People Also Study
Business & Financial Management
120 questions · 70% to pass
Contract Administration
60 questions · 70% to pass
Project Management
60 questions · 70% to pass
Related Study Resources
Previous Question
According to California regulations, what type of backflow prevention device is required for residential irrigation systems connected to potable water supplies?
Next Question
When installing engineered lumber joists (such as I-joists) in California residential construction, what is required at bearing points to prevent web crippling?