Steel bar representation of flat steel bar

The main reinforcement on the beam and the main reinforcement under the beam are marked: 3φ 22, 3φ 20? Said the upper reinforcement is 3 φ 22,? The lower reinforcement is 3 φ 20. ? 2φ 12,3Φ 18? Said the upper reinforcement is 2φ 12,? The lower reinforcement is 3 φ 18. 4Φ25,4Φ25? Said the upper reinforcement is 4 φ 25,? The lower reinforcement is 4 φ 25. 3Φ25,5Φ25? Said the upper reinforcement is 3 φ 25,? The lower reinforcement is 5 φ 25. ?

Stirrup indicates: φ 10@ 100/200(2)? It means that the stirrup is φ 10, the spacing between encrypted areas is 100, and the spacing between non-encrypted areas is 200, all of which are double leg hoops. ? φ 10@ 100/200(4)? It means that the stirrup is φ 10, the spacing between encrypted areas is 100, and the spacing between non-encrypted areas is 200, all of which are four-legged hoops. ? Φ 8 @ 200 (2) indicates that the stirrup is Φ 8, the spacing is 200, and the two legs are hoops. ? φ8@ 100(4)/ 150(2)? It means that the stirrup is φ8, the spacing between encrypted areas is 100, the spacing between limbs is 150, and the spacing between non-encrypted areas is double limbs. ?

Extended data:

Traditional domestic design methods are inefficient and the quality is difficult to control. Japan's structural drawings do not have detailed details of joint structure, and the detailed details of joint structure are redesigned by the construction company (construction unit), so the design efficiency is high and the quality is guaranteed. The structural design of the United States only gives the reinforcement area, and the specific reinforcement method is done by the construction company. Therefore, the traditional design method in China must be reformed.

Principle design process of flat plate method: design structural system-> structural analysis (mechanical analysis)-> structural construction drawing design. Structural design is a kind of commodity, which has use value and is a special commodity. It can be divided into creative labor and repetitive labor (non-creative labor). The creative design part (creative labor) is completed by the structural engineer, and the node structure and the structure outside the node are not the labor results of the structural engineer, but the copied specifications. (Note: The node structure can't be worked out, but it has been tested by researchers. The traditional one-component orthographic representation confuses creative work with non-creative work, and the design of internal and external structures of nodes belongs to repetitive work (non-creative work).

Baidu encyclopedia-reinforcement leveling method