Explain seismic design requirements for storage racks under ASCE 7 Chapter 15, especially for high-seismic jurisdictions such as California.

Steps

1. Confirm racks are classified as nonbuilding structures under ASCE 7 Chapter 15, specifically Section 15.5.3 (Steel Storage Racks and Steel Cantilevered Storage Racks in the 2022 edition)
2. Note steel storage racks over roughly 8 ft are treated as nonbuilding structures with their own response modification factor (R) from ASCE 7 Table 15.4-1, commonly cited as R = 4.0 for steel storage racks — confirm the exact value against the specific ASCE 7 edition in force, since values can differ by rack type/edition
3. Confirm ANSI MH16.1's own seismic provisions are written to align with the referenced ASCE 7 edition (MH16.1-2023 aligned to ASCE/SEI 7-22) — mismatched editions between the adopted building code and the rack standard used for design is a common error
4. Note California and other high-seismic jurisdictions may layer additional plan-review/PE-stamp and special-inspection requirements on top of the base ASCE 7 provisions — confirm with the local building department (e.g., CBC amendments) rather than assuming ASCE 7 alone governs
5. Recommend engaging a PE experienced in rack seismic design for any installation in Seismic Design Category C or higher, since rack seismic calculations require site-specific parameters (Ss, S1, site class) rather than generic assumptions