High score for construction professional questions about lintel reinforcement

The above is extremely irresponsible and dangerous.

1. The width of the window is meters, which means that it is not an ordinary window.

2. There is a 1-meter-high wall in the upper part, and the load is large, but whether there are other loads is not clear.

3. The questioner did not clarify whether the house to be built or the house had been built for decoration.

4. Whether the building structure type is a frame structure or a brick-concrete structure.

If it is a frame structure, and it is a new house, and there are frame beams in the upper part at the same time, it is recommended that: the height of the lintel is 250mm, the upper diameter is 12 threaded steel bars, the lower diameter is 16 threaded steel bars, the stirrup diameter is round steel (spacing 150mm), the concrete strength is not less than C25, and the length of both sides is not less than 400mm.

If it is a frame structure, and it is a house that has been built and decorated, and there are frame beams in the upper part, it is recommended that: the height of the lintel is 250mm, the upper diameter is 12 threaded steel bars, the lower diameter is 16 threaded steel bars, the stirrup diameter round steel (spacing 150mm), the concrete strength is not less than C25, and the length of both sides is not less than 300mm.

If it is a brick-concrete structure and is a new house, it is recommended that: the lintel is 300 high, two upper diameter 12 threaded steel bars, three lower diameter 18 threaded steel bars, stirrup diameter 8 round bars (spacing 100mm), concrete strength is not less than C25, and the length of both sides is not less than 400mm.

If it is a brick-concrete structure and it is a renovated house, it is recommended not to open such a large window, it is dangerous! Thank you!

For the sake of insurance, it's good to use double ribs, and it should be rebar.

It's nothing, 20 high is fine, the bottom three 14 steel bars, the upper two 10 bars, no is fine. 250 on each side of the shelf wall. Enough insurance.

There is no need to be equipped with double reinforcement, and there is no need to match the reinforcement after the erection reinforcement is set up, and the steel bar of 20 can be equipped below.

Hello, hello, I'm glad to answer for you, hello, the reinforcement of the secondary load lintel refers to the need to strengthen the beam to meet its bearing capacity when the beam is subjected to the secondary load. The specific reinforcement method and calculation formula need to be determined according to the actual situation, and the span, cross-sectional shape, material properties and other factors of the beam usually need to be considered. When calculating the reinforcement, it is necessary to calculate according to the design specifications to ensure the safety and reliability of the beam.

In addition, it is also necessary to consider the construction and use conditions of the beams in order to carry out specific implementation in the actual project. In addition to the reinforcement of the secondary load lintel, the reinforcement of the beam also includes the reinforcement method under different circumstances such as the first-level trillion load, the first load, and the wind load. At the same time, when carrying out reinforcement allocation, it is also necessary to consider factors such as the amount and position of reinforcement and the connection method of reinforcement to ensure the strength and stability of the beam.

1) There is too little reinforcement for the roof beams. When modeling the structure, the designer's drawing is convenient, and the roof beam directly copies the size of the lower beam. Because the load of the roof beam is small, the calculation result is not only more reinforcement, so that the crack width of the roof beam is larger due to the low reinforcement ratio under the action of temperature change, concrete shrinkage and force.

2) The torsional roof beam lacks the necessary waist reinforcement. For the general beam, in order to maintain the stiffness of the key rib skeleton, and at the same time to withstand the temperature and shrinkage stress and prevent excessive cracks in the beam belly, the general structural measures are to add waist bars when the height of the beam web is greater than 450mm, and the spacing is 200mm, and then the ribs are hooked. For torsional members, the second paragraph of Article 1 of the Code for Design of Concrete Structures (GB50010-2002) stipulates that the distance between the finger stools of the longitudinal stressed steel bars shall not be greater than 200mm and the length of the short side of the section of the rough balance beam.

For the roof beam with a cantilevered cornice, it is mistakenly equivalent to a general beam in the structural design, and the reinforcement is not designed according to the torsion member.

Summary. The height difference of the beam section is not more than 100 and the reinforcement of the bottom reinforcement of the beam is the same, and it can be set according to 1 6 bending through.

If the height difference of the beam section is not more than 100 and the reinforcement of the bottom reinforcement of the beam is the same, can it be set according to 1 6 bending through?

The height difference of the beam section is not more than 100 and the reinforcement of the bottom reinforcement of the beam is the same, and it can be set according to 1 6 bending through.

Under normal circumstances, the height difference of the plate beam section is not more than 100mm, and when the reinforcement of the bottom reinforcement of the beam is the same, it can be set according to 1 6 bending through. However, in practical application, the reinforcement and other parameters of the large reinforcement at the bottom of the beam may be different due to the different cross-sectional area of the beam, so reasonable reinforcement should be carried out according to the actual parameters of the beam to ensure the safety of the beam.