export type RiseRunInput = {
    /**
     * Floor-to-floor vertical distance
     */
    total_rise_in: number;
    /**
     * Tread depth (≥10in per IRC)
     */
    preferred_tread_in?: number;
    /**
     * Edition for the returned code_reference. IRC 2024 renumbered stairways from R311.7.x to R318.7.x; numeric rules unchanged.
     */
    irc_edition?: '2021' | '2024';
};
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