What technology was used in the Loop's construction that is similar to that of the Eiffel Tower?

The technology used in the construction of Chicago's Loop that is similar to that of the Eiffel Tower is riveted steel plate technology. This method allowed for the creation of strong and lightweight structural frames, which were crucial for the skyscrapers that define Chicago's skyline.

The Eiffel Tower itself was constructed using wrought iron, a material that employed similar engineering principles to riveted steel plate technology. This technique enabled architects and engineers to construct tall buildings that could withstand both vertical loads and lateral forces such as wind. The ability to create large, open interior spaces without heavy reliance on walls was paramount in shaping the modern architectural landscape of Chicago.

Timber framing, braced frames, and precast concrete represent various construction methods, but they do not share the same level of structural innovation or the same type of material usage as riveted steel plate technology, particularly when it comes to the design and engineering capabilities that allow for the iconic heights and designs seen in both the Eiffel Tower and the skyscrapers in the Loop.