Confirm ANSI MH16.3 is the RMI standard specifically for cantilever racks: first published in 2016, and superseded by ANSI MH16.3-2025 per rmiracksafety.org's release announcement — verify against rmiracksafety.org/mhi.org for the current designation before citing a specific edition year, in case a further update has followed
Confirm scope: applies to free-standing and top-tied cantilevered storage racks made of cold-formed or hot-rolled structural steel, including cantilever racks with accessories such as decked shelves, shed roofs, and canopies
Note cantilever racks are used for long/bulky/irregular loads (lumber, tubing, pipe, sheet goods) stored on arms extending from upright columns — a structurally distinct system from pallet rack
Confirm cantilever racks are explicitly excluded from ANSI MH16.1's scope — MH16.3 is the separate, correct standard to cite for these systems
Note recent editions have introduced more precise seismic/stability analysis methods (e.g., a direct analysis method) — flag that the specific technical method in force depends on which edition is being referenced
Known gotchas
Do not cite ANSI MH16.1 for cantilever rack design/inspection — MH16.3 is the correct, separate standard
Do not cite ANSI MH16.3-2016 as current without checking for a newer edition — ANSI MH16.3-2025 has since been released; confirm the current designation via rmiracksafety.org/mhi.org before citing a specific year
Cantilever rack R-Mark certification is administered as its own certification track, separate from pallet-rack R-Mark — don't assume one certification covers both rack types
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