What do the paper format codes e, c and a of cad stand for respectively?

Represents the area used for positioning. If the drawing is vertically divided into A-M, there are 13 areas; It is horizontally divided into 1- 16, with a total of 16 areas. Then C8 represents the areas in the longitudinal direction c and the transverse direction 8. If a wire needs to be connected from C8 to D9 in another drawing, it can be clearly indicated in the drawing.

According to the architectural drawing regulations, the axis number is represented by horizontal capital letters: ABCDE…… ......................................................................................................................................................... Vertical numbering.

If you need to add a temporary number, please write-1, -2 ... and so on. After the main letter or number to indicate an axis after the first additional axis and the second additional axis.

The A-E view represents the front view (A is on the left) and the E-A view represents the back view (E is on the left). If it is an 8- 1 view, it is a right view (elevation) viewed from the right.

Extended data:

CAD technology has been in constant development and exploration. The application of CAD technology has played a certain role in improving enterprise design efficiency, optimizing design scheme, reducing the labor intensity of technicians, shortening design cycle and strengthening design standardization. More and more people realize that CAD is a great productivity.

CAD technology has been widely used in machinery, electronics, aerospace, chemical industry, construction and other industries. Design methods such as concurrent design, collaborative design, intelligent design, virtual design, agile design and life cycle design represent the development direction of modern product design mode. With the further development of artificial intelligence, multimedia, virtual reality, information and other technologies, CAD technology is bound to develop in the direction of integration, intelligence and collaboration.

Enterprise CAD and CIMS technology must take a step-by-step road with e-commerce as the goal. Realize integrated, intelligent and networked management from within the enterprise, cross enterprise boundaries with e-commerce, and realize a real agile supply chain for customers, enterprises and suppliers.

Baidu encyclopedia -CAD