Explanation #3. Practical
The tradition of building houses with wide cornices is rooted in antiquity: the roofs that cover the building like an umbrella appeared in the 1st century. They protected wooden buildings from rains, during which water washed away the foundations and even flowed in through windows and cracks in the walls. Thanks to the overhanging roof, rain streams did not destroy the houses. But the design also had a minus: it prevented sunlight from entering the room, greatly shading it. The problem was solved around the 2nd century – the corners of the roofs were slightly raised up, and the buildings became not only dry, but also light.
In addition, such structures were distinguished by earthquake resistance, and in the 10th century there was even a saying in China: “Walls may collapse, but the roof will never collapse.” The roof was supported not by walls, but by a complex system of pillars and beams. The central pillar dampened vibrations during earthquakes, and the curved edges of the roofs made it possible to redistribute the weight and reduce the load on the corner supports.
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