What is the total length of Lu Banchi? Is it 50.4 cm or 46.08 cm?
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 Lugong Traffic Class in the Spring and Autumn Period, and is called "Menmi".
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 ancient book records that "Lu Banchi is one foot, four inches and four minutes, eight inches between feet, and one inch is accurate and one inch is eight minutes." The "bending ruler" is a carpenter's ruler used by ancient carpenters, and its length is the same as that of the building ruler promulgated by the Ministry of Industry of the imperial court in previous dynasties.
Because the building in Ming and Qing Dynasties is 32 cm long, Lu Banchi is 46.08 cm long, and Lu Banchi is 5.76 cm per inch. There are very few Lubanchi handed down from generation to generation. There is a Lu Banchi in the collection of Beijing Palace Museum, which is 46 cm long, which is very close to the length of Lu Banchi recorded in ancient books.
Lu Ban was born in the 13th year of King Jing of Zhou (507 BC) and died in the 25th year of King Jing of Zhou (444 BC). He lived in the late Spring and Autumn Period and the early Warring States Period, and was born in a family of artisans for generations. Since childhood, I have participated in many civil engineering projects with my family, gradually mastered productive labor skills and accumulated rich practical experience.
Lu Ban was an outstanding inventor in ancient China. His name and story have been circulated among the broad masses of the people for more than two thousand years. Chinese folk craftsmen all respect him as the founder.
Baidu Encyclopedia-Lu Banchi