North Span Works
2 floors reconstructed from HABS drawings.
Historic American Buildings Survey, OH-2478. HABS public-domain measured drawings: https://commons.wikimedia.org/wiki/File:First%20Floor%20Plan%20-%20Tremont%20House%2C%20101%20East%20Main%20Street%2C%20Bellevue%2C%20Huron%20County%2C%20OH%20HABS%20OH-2478%20(sheet%203%20of%2012).png
Production reconstruction, not a survey or construction document. Floor heights estimated; floors aligned automatically; horizontal scale unverified. Stairs and inter-floor routes unconfirmed, including where no stairs are modeled. Decorative finish palette is not evidence of original construction.
6 assembly blockers remain. 0 stair proposals; none confirmed.