In the fall of 1930, the Indianapolis telephone company faced a monumental dilemma: they needed a larger headquarters, but the lot was occupied by their eight-story central building weighing 11,000 tons. Demolishing it was unfeasible, as it housed the city's vital telecommunications switchboard. The daring engineering solution was as unusual as it was brilliant: move the entire building without evacuating it.
Designed by architect Kurt Vonnegut Sr. and a team of structural engineers, the operation was carried out over 34 days with near-surgical precision:
- Bearings and rollers: The colossal brick and concrete mass was lifted from its foundations using hydraulic jacks and rested on hundreds of cylindrical hardwood rollers set on steel rails.
- Millimeter progress: Powered by hand-operated mechanical screw jacks and a small steam engine, the skyscraper advanced at an imperceptible pace of about 40 centimeters per hour.
- Live infrastructure: So that the 600 office workers could continue their workdays, gas, water, and sewage supplies were connected via flexible rubber hoses, while thousands of telephone cables were spliced into expandable loops.
The building was shifted 16 meters to the west, rotated exactly 90 degrees, and pushed another 30 meters to the south. Staff entered daily via a telescoping wooden walkway. No calls were dropped, no pipes burst, and occupants claimed the motion was so smooth that the coffee in their cups did not even ripple.
Source: Historic Indianapolis & American Society of Civil Engineers (ASCE)
