Rautarunko

Rautarunko is a Finnish term that translates to "iron frame" or "steel frame" in English. It refers to a construction method that utilizes a structural framework made of iron or steel to support a building or other structure. This method became prevalent with the advancements in metallurgy and engineering during the Industrial Revolution.

Iron and steel frames offer significant advantages over traditional materials like wood or masonry. Their high tensile strength allows for greater spans and taller structures, enabling architects and engineers to design buildings with larger open spaces and fewer internal supports. This made them ideal for industrial buildings, warehouses, bridges, and eventually, skyscrapers. The use of prefabricated steel components also facilitated faster construction times.

The development of the iron frame was a crucial step in modern architecture and engineering. Early examples include the Crystal Palace in London, designed by Joseph Paxton for the Great Exhibition of 1851, which showcased the potential of iron construction. Later, the steel frame revolutionized urban landscapes with the rise of tall buildings. While Rautarunko specifically refers to the material of the frame, the concept encompasses the engineering principles and architectural possibilities that emerged from its use. Today, steel framing remains a dominant construction technique worldwide.