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:
Lu Ban was a native of Lu in the Spring and Autumn Period and a famous craftsman in history. The woodworking industry is founded by Bailuban. When carpenters make tables, doors, windows and furniture, they will use a ruler one foot, four inches and one quarter long. Rulers not only have dimensions, but also words to ward off evil spirits and take good luck. People call it Lu Banchi, also called secretary.
It is said that Lu Ban and Wen Gong are both famous craftsmen, but Lu Ban is always superior, which makes Wen Gong very jealous. Once, these two men were ordered to lead their people to build a palace. While people were not looking, Jin Wengong sawed the ruler that Lu Ban used to measure the length short and changed it from one and a half feet to one and a half inches. When Lu Ban's disciples used this ruler to cut wood, they found that the length was wrong.
Time was short and materials were exhausted. Lu Ban used his quick wits to replace the insufficient length with a stone pier, and the result was more solid and beautiful. The king was very satisfied. When people asked him how he had such a whimsical idea, Lu Ban smiled and replied, relying on the ruler given by Wen Gong! From then on, Wen Gong was convinced. This ruler has been handed down to this day.
Baidu Encyclopedia-Lu Banchi