Section 8 — 706 — LATERAL LOAD REGULATIONS

2025 California Historical Building Code (Title 24, Part 8) · 2025 edition · ingested 2026-07-06 · California

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8-706.1 Seismic forces. Strength-level seismic forces used to evaluate the structure for resistance to seismic loads shall be based on the R -values tabulated in the regular code for similar lateral-force-resisting systems including consideration of the structural detailing of the members where such R -values exist. Where such R -values do not exist, an appropriate R -value shall be rationally assigned considering the structural detailing of the members. Exceptions: 1. The forces need not exceed 0.75 times the seismic forces prescribed by the regular code requirements. 2. For Risk Category I,…