SanbornÂ® fire insurance maps are detailed property and land-use records covering more than 12,000 U.S. towns and cities.
The maps provide information, such as building outline, size and shape, construction materials, height, building use, windows and doors, street and sidewalk widths, boundaries, house numbers, and more. The plans often include information and shading for steel beams or reinforced walls, plus symbols for stables, garages, warehouses, etc.
Factories are labeled with the owner’s name, as well as the products manufactured there. In large industrial and commercial buildings, even individual rooms and their uses are recorded. Also depicted are pipelines, railroads, wells, water mains, dumps, and heavy machinery likely to affect the property’s vulnerability to earthquake, fire, and flood.