Retaining Wall Inspection Checklist: How to Know If Your Wall Passes California Title 24 Code
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To pass California Building Code (CBC) and County of San Diego building inspections, an engineered retaining wall must satisfy 4 core milestones: (1) footings embedded into competent native soil below minimum erosion depth, (2) geogrid reinforcement placed at specified course intervals, (3) a continuous perforated French drain enveloped in 3/4" washed aggregate, and (4) finished wall deflection remaining under 1/4 inch per 4 feet of height.
The 10-Point Retaining Wall Safety & Compliance Checklist
| Inspection Item | Code Specification / Standard | Pass / Fail Criteria |
|---|---|---|
| 1. Footing Depth & Width | Min 12" below grade; width min 1.5x wall thickness | Fail if resting on loose uncompacted fill |
| 2. Soil Compaction | Minimum 90%–95% Standard Proctor density | Verified via nuclear density gauge |
| 3. Rebar Size & Spacing (CMU) | Grade 60 #4 or #5 rebar every 16–24 inches on center | Solid grouted cells; zero dry pockets |
| 4. Geogrid Embedment (Segmental) | Minimum length = 70% of total wall height (0.7 x H) | Fail if geogrid is bunched or torn |
| 5. French Drain Pipe Gradient | Minimum 1% positive slope (1/8" per foot) to daylight | Water must flow freely to legal discharge |
| 6. Drainage Gravel Column | Clean 3/4" crushed angular rock (min 12" thick) | Fail if native dirt is mixed into rock |
| 7. Filter Fabric Wrap | 4–6 oz non-woven geotextile completely enclosing rock | Must prevent soil fines infiltration |
| 8. Weep Hole Outlets | 2"–3" diameter weep pipes every 6 to 10 linear feet | Clear of debris; flowing freely |
| 9. Surcharge Clearance | No unengineered vehicles or pools within 1:1 zone | Verified per stamped engineering plan |
| 10. Top Cap Securement | Coping caps glued with high-strength polyurethane | Fail if caps are loose or hazard to sit on |
Preparing for a Property Sale in Rancho Santa Fe
Home buyers and property inspectors in Rancho Santa Fe closely scrutinize retaining walls on hillside parcels. An unpermitted or bowing wall can stall escrow, require $20,000+ repair credits, or void homeowner insurance coverage.
Schedule a Certified Retaining Wall Inspection in Rancho Santa Fe
📞 Call (619) 408-4954 | 💬 Text (619) 408-4954
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