{"nrhp_refnum":"83001969","name":"Jaeger Machine Company Office Building","other_names":["Business Telephone Systems Office Building"],"category":"building","location":{"address":"550 W. Spring St.","address_restricted":false,"city":"Columbus","county":"Franklin County","state":"OH","lat":39.96550596900005,"lon":-83.01704539999997,"geom_source":"nps_gis"},"listed_date":"1983-06-16","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry","Architecture"],"significance_levels":["state"],"summary":{"what_it_is":"A two-story concrete office building at 550 W. Spring St. in Columbus, Franklin County, Ohio, built in 1936 for the Jaeger Machine Company and designed by company president O. G. Mandt and engineer Lyon Gardner.","why_significant":"The building is argued to be the best surviving representation of the 1930s, the Jaeger firm's most prosperous period, when it was a leading concrete mixer maker. It was built as a symbol of the company's success and stability. It is also described as a rare Columbus example of 1930s industrial architecture, with Art Deco influence.","narrative":"This two-story concrete office building at 550 W. Spring Street in Columbus was constructed in 1936 for the Jaeger Machine Company. Because of the slope of the site, it appears as one story from the south front and two stories at the rear, where garage and storage space originally sat beneath the offices. The design came from company president O. G. Mandt and engineer Lyon Gardner, and company crews carried out the work. Steel casement windows, spare geometric ornamentation, and plain stucco walls show the influence of 1930s Art Deco industrial design. Jaeger, founded in 1906, grew into a major maker of concrete mixers, and the 1930s were its most prosperous years. The nomination presents the office building as a symbol of that success and as the structure that best represents the period. Two other Jaeger production buildings nearby were left out because later changes tie them to later company history. The building is also a rare local example of its type in central Columbus.","period_of_significance":"1936","architect_builder":"O. G. Mandt/ Lyon Gardner","architectural_style":"Vernacular industrial design with Art Deco influence (1930s industrial architecture)","criteria":["A"],"status_note":"Listed as occupied, in good condition and altered, with the original site retained; used for industrial purposes.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:53:15.065429-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_OH/83001969.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/83001969/9641624a49-800.webp","url_1600":"https://nationalhistoricalregister.com/media/83001969/9641624a49-1600.webp","licence":"CC BY-SA 4.0","author":"Ɱ","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Arena_District_52.jpg\" rel=\"noopener\">Ɱ</a>, <a href=\"https://creativecommons.org/licenses/by-sa/4.0\" rel=\"license noopener\">CC BY-SA 4.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Arena_District_52.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71988507","wikipedia":"https://en.wikipedia.org/wiki/Jaeger_Machine_Company_Office_Building","wikidata":"https://www.wikidata.org/wiki/Q104426000"},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/franklin-county/jaeger-machine-company-office-building-83001969/"}