The sheet needs the header names No, EL.X, h1 and h2 (case, spaces, dots and units in parentheses are ignored). Rows are
checked: No must be a unique positive integer, EL.X must be in metres (30–100), h1 and h2 must be positive mm up to 1000.
Any error stops the import with the first messages; a valid sheet fills this pier's drawing values and regenerates the
pier. The parser is pure and tested.
Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>
