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- 19:05, 15 January 2026 Admin talk contribs created page F4:Perpendicularity Validation (Created page with "{{Author Credit |author=Admin }} == Summary == F4 validates perpendicularity against the ASME logic in the F4 Application and enforces datum, feature-type, modifier, and pattern rules. == Validation rules == * A primary datum reference is required. * Perpendicularity is valid only for a planar surface, a planar feature of size, or a cylindrical feature of size. * Perpendicularity cannot be applied to a pattern. * Unequally disposed is not allowed. * Plan...")