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Anonymous users2024-01-24There are no special requirements, and there are detailed instructions in the Code for the Design of Concrete Structures and the National Standard Atlas G101.
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Anonymous users2024-01-23Look at the 11G101 atlas, there are relevant regulations.
The above practices can be used for reference.
03G101-1 Page 66 is very detailed The anchorage upper reinforcement at the support is normal It is to meet the anchorage length or times the anchorage length +15d The bottom reinforcement can go deep into the support for 12d If the end is the first row of straight anchors in the upper part, if it is not satisfied, it will be extended to the opposite side and bend 12d The second row extends from the support to the net span of the beam The bottom reinforcement goes deep into the outer edge of the end support.
The backfill inside the sunken part can be chiseled off, provided that the floor slab is not damaged, and the brick wall under the sunken part can also be removed.
The cantilever lead beam requires that the upper steel bar of the cantilever beam should meet the quality assurance requirements, and the direct anchorage anchorage length is not less than 25 times the diameter of the steel bar, if the law enforcement requirements are not met, the upper steel bar should be bent anchorage, the length of the straight section of the bent anchor must be greater than or equal to the length of the straight section, and the length of the hook on the inner side of the deep support should be 15 times the length of the steel bar diameter.
Atlas 03G101-1 Correction Board Page 66 A, B, C Three. Pure cantilever is only suitable for the elevation far away from the main beam, similar to the corbel. The general description of the general structure has a large explanation.