Steel

Steel Have you ever wondered how skyscrapers came about' Before there were skyscrapers, there were towers. Made of heavy stone, towers had thick, sturdy walls, but the rooms were dark and cramped. The reason the towers were so dark was because having too many windows would weaken the structure. Soon Gothic cathedrals joined the quest for height. Long, stone arms, called flying buttresses, supported the cathedral’s heavy weight, allowing the walls to be filled with colorful glass windows. George A. Fuller was the first person to invent the sky scrapper. Fuller worked on solving the problems of “load bearing capacities” of tall buildings. Fuller built the Tacoma building in 1889, the first building, weight, walls, towers, steel, skyscrapers, idea, fuller’s, fuller, first, built, windows, structure, stone, material, make, heavy, ever, dark, bessemer, york, worked, work, wondered, weaken, way, valuable, today, thick, tall, tacoma, supported, support, sturdy, step