3-meter-long full-size Lu Banchi
Lu Banchi, also known as "Lu Banchi" and "Lu Banchi", is a measuring tool used in building houses, similar to the ruler used by craftsmen today. Lu Banchi, about 46.08 cm long, is said to have been made by the Lu public transport class in the Spring and Autumn Period. Later, it was added to the geomantic circle to measure the good and bad luck of houses and houses, which was called "door plan".
Also known as "square", it is mainly used to check whether the planed plates, purlins and structures are vertical and whether the edges are at right angles to each other. 1 city ruler =0.8 half a foot. Soon after, Lubanchi appeared, Ding Lan ruler was integrated, and then inches and centimeters were integrated. It is an important tool for measurement and calibration. Because of its special function, it is most widely displayed in geomantic culture and architectural culture.
Extended data:
The ancients paid attention to auspiciousness in their creation, and the dimensions of buildings and furniture were accurately measured by Lu half a foot. Inside the Forbidden City, all doorways in the main hall, including furniture, are made according to the size of Lu Banchi.
For example, the size of the door, the Qing Ministry of Industry Engineering Record lists the size of 124 doors ruled by Lu Banchi, including Jiafu 3 1 door, Yishun 3 1 door, 33 doors and Fude 29 doors. Strict production size ensures the frequent appearance of the auspicious number "Nine" in the Forbidden City building, and meets the emperor's requirements for the meanings of "Ninth Five-Year Plan", "Forever" and "Jiangshan will never change color".
The reasonable scale also makes the Forbidden City architecture enduring and beautiful, which makes people impressed by the wisdom of the ancient ancestors of the Chinese nation.
The standard size of Lu Banchi is 46 cm, and the length of ancient Lu Banchi is 46.08 cm. The length of Lu half a foot is also scientific. The Taihe Gate Courtyard of the Forbidden City has a depth of 130m, a width of 200m and an aspect ratio of 0.65, which is also very close to the golden ratio of 0.6 18.
The center of the courtyard from Daming Gate to the Hall of Supreme Harmony is 1.5045 km, while the distance from Daming Gate to Jingshan is 2.5 li, and the ratio between them is 0.6 18, which is exactly the golden ratio. A large part of these golden proportions also benefited from the assistance of Lubanchi.
The golden ratio is the hidden beauty of science, and most of the fine products made by traditional crafts follow this ratio. In addition to the size of the building, many sizes of mahogany furniture have also been measured by Lu half a foot. A piece of mahogany furniture with exquisite art and high collection value is not only expensive in materials, but also rigorous in size and perfect in proportion.
Lu Banchi is the standard of ancient houses and furniture. Up to now, some mahogany furniture enterprises still use this ancient tool to determine the size of mahogany furniture, which shows that its scientific basis is recognized by the public. For modern houses and furniture, Lubanchi still has very important reference value.
References:
Baidu Encyclopedia-Lu Banchi