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Tier 1 (vector + text layer): read directly, no OCR. Sheet is 8 generic construction-detail sections, not a plan view, so no repeated device/fixture symbol population exists to group into symbol_groups -- the deliverable here is the text_facts locating the by-trade (EC/GC) callouts and Division-26 keyed notes that this run's takeoff line and coverage_gaps cite. Text extracted with PyMuPDF get_text(); page has /Rotate 90, so word/block geometry was taken back to displayed space via page.rotation_matrix before recording x/y/bbox below.
Names come from: no legend on this sheet, so NECA 100-2006 is what a name rests on. It is the baseline for what a symbol MEANS, never for matching shapes — proportions differ per firm. Confirming a name here is a correction, and corrections are what build the firm's file.
Scale is UNSET. Nothing on this sheet has been measured. The reader declined to infer a scale rather than guess one, so there is no raceway and no branch wire off this sheet — together the largest block of material on a job of this kind. Set it from the title block and measurement becomes available.
RRE