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The first thing to explain is that the steel bar budget we usually call is different from the actual steel bar cutting. The steel bar budget we refer to is the steel bars calculated according to the requirements of the building specifications or the standard square method atlas. There are many construction site requirements that need to be considered when cutting materials. For example, the location of the breakpoints of our steel bars is stipulated in actual construction. They must be broken within 1/3 of the span. Pay attention to the avoidance of steel bars where the components are staggered. After we get the structural drawings, we first analyze the structural form of the building, its roughly components, and what type of foundation it is. Then we generally calculate the shear walls from bottom to top, that is, the order of construction. (1) Basics: Here are some common basics. 1. Independent basis: It is often used in frame structures. When calculating steel bars, what should be paid attention to is the length of the bottom plate stressed steel bars. It can be taken as 0.9 times the side length or width, and arranged in a staggered manner. ； 2. Raft foundation: Generally used in shear wall structures, we can learn carefully * Let’s take a look at the content in 04G101-3. For example, there are some specific requirements for the steel bars in the sunken sub-raft that the steel bars should extend beyond the edge of the board LA (minimum anchorage length). 3. Strip foundation: Generally used in brick-concrete structures. (2) Upper components: 1. Column: Column reinforcement is relatively simple, with only longitudinal bars and stirrups. For longitudinal reinforcement, attention should be paid to the foundation reinforcement problem of the bottom layer. The difference in the anchoring length of the top column longitudinal reinforcement for the side columns, center columns, and corner columns can be found in (03G101) ； When stirrups, attention should be paid to the length of the encrypted area.: Encryption of the bottom column root >=Hn/3, encryption length of the upper part of the column >=Hn/6, >=500 takes the larger value, and it should also be noted that the overlap range of the column should be encrypted. (Hn refers to the clear height of the column on the floor) 2. Beam: Beam reinforcement shall be calculated in accordance with 03G101. The beam has upper long ribs and support negative ribs (1/3Ln in the first row, 1/4Ln in the second row, Ln is the larger value of the left and right spans). The bottom ribs are generally calculated based on the anchoring length of each span extending into the supports on both sides. 3. Shear wall: The components in the shear wall must be fully calculated. These include: Distributed steel bars on the wall (there are horizontal steel bars and longitudinal steel bars. Pay attention to the anchorage of the horizontal steel bars at the intersection of the wall and the wall. The anchorage requirements for various corners are different), the steel bars of the wing columns (columns formed at the intersection of the wall and the wall), shear force The wall's connecting beam reinforcements (connecting beams formed above door and window openings), concealed column reinforcements (concealed columns formed on both sides of door and window openings), end column reinforcements (columns at the ends of shear walls), concealed beam reinforcements (beams configured in the wall due to structural requirements).