What is the function of inclined top bricks? Why should inclined top bricks be built diagonally?

The main purpose is to prevent horizontal cracks at the bottom of the wall beam and make it more convenient for construction.

1. From the perspective of construction, the masonry method of 45-60 degrees is more convenient for construction.

2. It belongs to the specification requirements: "Code for Acceptance of Construction Quality of Masonry Structure Engineering", filling the wall.

Masonry masonry should be subject to the inspection and approval of the load-bearing main structure.

After passing the acceptance. The construction of the gap between the filling wall and the load-bearing main structure should be carried out after the masonry of the filling wall.

3. In order to adapt to the frame structure.

Deformation: When the frame beam is deformed due to force, the deformation part will not cause the masonry wall to be damaged by compression.

4. Favorable seismic resistance: because the masonry wall and the top beam are not rigidly connected, when the horizontal wave is generated.

When the masonry wall does not follow the frame.

Generally, in the filling wall, the top brick oblique masonry is to make the top of the wall dry and dense plastering is not easy to crack, the effect is not good and the construction is not easy to operate, on the one hand, the oblique brick is because the suit material is the same as the filling wall material, and the problem of mixed paint will not occur, and there is that the oblique masonry can better squeeze the gap with the bottom of the beam plate, and there is also a kind that can also be poured with concrete, but it is generally not often used because it is time-consuming and laborious, and it is easy to cause shrinkage cracks.

There are many factors, mainly to prevent horizontal cracks at the bottom of the wall beam; The main practices are as follows:

1. The height of about 20cm should be left at the top of the masonry engineering masonry, and the masonry of the inclined top brick is carried out after 7 days after the masonry of the masonry engineering is completed, and the reason is that after the masonry and mortar shrink and settle evenly, the inclined top brick is constructed;

2. The inclined top brick must be tightly pressed with the structural beam plate and the mortar is full, otherwise there will be cracks in the shrinkage or grout of the masonry after the plastering is completed;

3. At the interface of different materials (mainly referring to the interface between concrete structure and masonry), steel wire mesh should be nailed, and the width should not be less than 200.

I checked the relevant specifications, in fact, the specifications do not say that it must be built diagonally (I haven't seen it yet.)"Vertical (top) bricks are obliquely built"Such a word Burning He big eyes appear in the specification, if there is an error, please point out the correction).

The basis for this statement, I think that the skin should be erected should be the "Masonry Engineering Construction Quality Acceptance Code" GB50203-2002 Article stipulates: "When the infill wall is built close to the beam and the bottom of the slab, a certain gap should be left, and the infill wall should be built at least 7 days apart."Then make up the masonry and squeeze it tightly. ”If the masonry is tightened, if it is a flat masonry, due to the difficulty of operation, the caulking is difficult to compact, and it is easy to produce gaps, and it cannot meet the requirements of the specification.

However, in accordance with the latest "Code for Acceptance of Construction Quality of Masonry Engineering" GB50203-2011, this provision has been modified, and the latest description should be infill wall masonry masonry, which should be carried out after the acceptance of the inspection batch of the load-bearing main structure. The construction of the gap between the filling wall and the load-bearing main structure should be carried out 14 days after the masonry of the filling wall.

But whether the specification is explained or not, it is still necessary to build bricks obliquely. First, it is convenient for workers to construct, and secondly, from a mechanical point of view, this masonry can better reduce the probability of cracks caused by the deformation of beams and plates, and also save bricks.

1. The oblique brick of the top brick in the filling wall is to make the top of the wall more dense, and it is not easy to crack after plastering.

2. According to the principle of structural mechanics, the top of the infill wall is obliquely masonry, and the principle of force conforms to the role of the infill wall under the theory of frame structure. 3. From the perspective of construction, this masonry method is more convenient for construction.

4. Article GB50203-2002 of the Code for Acceptance of Construction Quality in Masonry Sales GB50203-2002 stipulates that when the infill wall is built close to the bottom of the beam and slab, a certain gap should be left, and the infill wall should be built at least 7 days apart, and then it should be patched and squeezed. Because after the completion of the masonry of the infill wall, the masonry will produce a certain deformation, and improper construction will not only affect the close combination with the beam and the bottom of the slab, but also produce cracks in the joint part.

On the one hand, the oblique brick is used because the material of the oblique brick is the same as the material of the filling wall, and the problem of mixed masonry will not occur, and in addition, the oblique masonry can better squeeze the gap with the beam and the bottom of the slab. Of course, it can also be poured with concrete, but generally not, because if the concrete is poured, it is difficult to embed the void if the collapse is too large, and the concrete itself is difficult to compact if the collapse is too small. So it's not commonly used.

Moreover, the shrinkage coefficient of the concrete line is not consistent with that of the brick masonry, which is easy to cause shrinkage cracks.

5. The reinforced concrete wall columns in the frame structure are load-bearing components, and the brick masonry is a decorative component.

The first purpose of making oblique bricks is to make up for the gaps in the upper part caused by the deformation of the brick masonry after the masonry is completed; Secondly, the masonry wall itself does not involve load-bearing, and when the beam is deformed due to the force, its deformation part will not cause the masonry wall to be damaged by compression;

At the same time, it plays a positive role in the seismic structure, because the masonry wall and the top beam are not rigidly connected, when the horizontal wave is generated, the masonry wall will not swing with the frame to ensure that it reduces or partially eliminates the impact of the wall to achieve the effect of seismic resistance.

Summary. Hello dear! We'd be happy to help you answer your questions!

The top brick oblique masonry is less than 5 meters to be oblique on both sides, "when the length of the masonry filling wall is less than 5 meters, the top must be obliquely masonry." Generally at 45-60 degrees. If the height of the diagonal masonry is less than 45 degrees, the bricks will sink with the wall and will not play a fixed role.

If the angle of diagonal masonry is greater than 60 degrees, then there is no difference between diagonal bricks and upright bricks. When the wall sinks to a large extent, the diagonal bricks laid on the top are easy to crack. So it is more suitable at this height.

Hello dear! We'd be happy to help you answer your questions! The top brick is obliquely built on both sides of Kiyoshi Ono at 5 meters, "When the length of the masonry filling wall is less than 5 meters, the top must be obliquely built.

Generally at 45-60 degrees. If the height of the diagonal masonry is less than 45 degrees, the bricks will sink with the wall and will not play a fixed role. If the angle of oblique masonry is greater than 60 degrees, then there is no difference between diagonal bricks and vertical bricks.

When the wall is quietly sinking with a large Cheng Zhao ridge, the diagonal bricks laid on the top are easy to crack. So it is more suitable at this height.

The reason why the top brick should be built diagonally is mainly to make the combination between the wall and the beam more compact, and to prevent the cracking of the dense plaster layer painted on the top of the wall that has been dried. If the top brick is masonry in the way of flat masonry, not only is it not easy to construct, but also the masonry effect is not good, and the delay is also prone to the phenomenon of cracking the code liquid in the later stage.

1. The height of the masonry land section and the top needs to be about 20 cm. 2. When the top brick is obliquely built, the letter needs to be tightly attached to the structural beam plate to avoid gaps. 3. During construction, it is necessary to make the angle about 45 60 degrees.

4. After the load-bearing structure is inspected, the infill wall construction can be carried out. 5. The frame beam will not be deformed due to the force.

What is the function of inclined top bricks? Why should inclined top bricks be built diagonally?

Hello, there are many factors, the main one is to prevent horizontal cracks at the bottom of the wall beam; The main Li number practices are as follows: 1. The masonry engineering masonry should be left to the top of about 20cm in height, and the masonry of the masonry engineering is completed 7 days after the masonry is carried out in the masonry of the inclined top bricks. 2. The inclined top brick must be tightly pressed with the structural beam plate, the mortar is full, otherwise the masonry should shrink or sink after the plastering is completed, and there will be cracks through it; 3. At the interface of different materials (mainly referring to the interface between concrete structure and masonry), steel wire mesh should be nailed, and the width should not be less than 200. Thank you.