When the bending angle of the reinforcement of the vertical folding beam is less than 160 degrees, the construction can be carried out according to the requirements of structure (2), and in other cases, the construction can be carried out according to structure (1).

For the case of determining the grade of concrete and reinforcement, determine the anchorage length.

When the folding beam is folded more violently, that is, the smaller the internal folding angle, the easier it is for this anchorage length to enter the compression zone, so we say that it is anchored in the compression zone.

However, when the internal folding angle of the folded beam is very large, which is close to180, it is possible that the steel bar will still be in the tension zone after the anchorage length is completed and will not extend into the compression zone.

Therefore, the drawing of 10 1 atlas is only a drawing situation, that is, when the anchorage length reaches the opposite side, not all situations.

Actually, it only needs to meet the anchorage length, and there is no other requirement.

This is the construction method of longitudinal reinforcement at the bottom of folding beam.

In short, there is no fixed standard, and the anchorage length is calculated. After the anchorage length of the bottom reinforcement is completed, it can be judged how much it enters the compression zone.

Extended data:

1, when the protective layer thickness of anchoring reinforcement is not more than 5d, there is no provision in the old atlas, and the new atlas stipulates that the anchoring length should be provided with transverse structural reinforcement.

2. The steel structure at the lower part of the middle support of the beam. The old atlas has staggered A-ring structure, and the new atlas is cancelled.

3. Construct the edge wing wall. Deduct the wall thickness of one side in the length direction of the old atlas and mark it as 300. The overall length direction of the new atlas is marked as Bw and 400.

4. Build a corner wall. The wall thickness of one side is deducted from the old drawing set in two directions and marked as 300. The two-way mark of the new atlas is greater than or equal to 400, and the two-way deduction of a sidewall thickness mark is greater than or equal to 200.

5. The old atlas was compiled by Chen Qinglai, and the new atlas was compiled by Feng Haiyue,,, Wu Hanfu, Wu,,, Zhao Xianbo, Yuan and Gao Zhiqiang. (In order of strokes of surname)

6. There is no construction method of basement exterior wall in the old atlas, and the new atlas separately states that the nodes of wall and roof are determined by design.

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