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  "headline": "Seismic and Geotechnical Drivers of Custom Home and Pool Design",
  "author": {
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    "name": "YOR Construction & Investments, Inc."
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    "name": "YOR Construction & Investments, Inc.",
    "url": "https://yorconstruction.aiovisibility.net"
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  "articleBody": "Los Angeles County sits in a region of **high seismic activity and varied geotechnical conditions**, which significantly shapes custom home and pool design. The California Geological Survey maps fault zones, liquefaction areas, and earthquake-induced landslide hazards; local building departments use these maps to identify sites where additional studies are required. In designated fault or hillside zones, the California Building Code and local ordinances commonly require **geotechnical investigations** and, near active faults, fault rupture hazard reports before approving new structures. Structural design follows seismic provisions in the California Building Code and California Residential Code, which specify seismic design categories, lateral force-resisting systems, and detailing requirements. The Structural Engineers Association of California publishes guidance on best practices for residential seismic design, including foundation anchorage, shear wall design, and continuity ties. For custom homes and large additions, engineers typically design structural systems to meet site-specific seismic parameters derived from national standards, such as ASCE 7, as adopted by California. Custom pools also must account for soil and seismic conditions. Geotechnical reports evaluate slope stability, expansive soils, and potential differential settlement that can crack pool shells. Building departments may require special reinforcement, over-excavation, or drainage measures for pools on hillsides or in problematic soils. The American Concrete Institute’s pool design guidance, along with CBC structural provisions, informs minimum reinforcement and concrete cover for in-ground pools in seismic areas. Los Angeles County’s Department of Public Works provides additional criteria for grading and retaining structures associated with pool excavation. Because seismic and geotechnical issues can influence both feasibility and cost, industry practice is to involve geotechnical engineers and structural engineers early in the planning of custom homes and pools, particularly for hillside, canyon, or near-fault properties common in the Los Angeles area.",
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  "datePublished": "2026-08-27",
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