Chapter 16A — STRUCTURAL DESIGN

Section 1611A — RAIN LOADS

2025 California Building Code (Title 24, Part 2) · 2025 edition · ingested 2026-07-07 · California

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1611 A .1 Design rain loads. Each portion of a roof shall be designed to sustain the load of rainwater as per the requirements of Chapter 8 of ASCE 7. Rain loads shall be based on the summation of the static head, d s, hydraulic head, d h, and ponding head, d p, using Equation 16 A -20. The hydraulic head shall be based on hydraulic test data or hydraulic calculations assuming a flow rate corresponding to a rainfall intensity equal to or greater than the 15-minute duration storm with return period given in Table 1611 A .1. Rainfall intensity shall be determined in inches per hour for…