First, make the assembled stair step formwork.
First, the side wall of the stair shall be erected and reinforced by wall bolts, battens and steel pipes.
After the removal of the concave breast board on the inner side is completed, pull out the stair step baffle from the small wooden square and use crowbars to cooperate with the construction, as shown in the figure.
7.
It takes a long time for iron wire to bind the stair step to reinforce the formwork, which is difficult to reinforce, and it is difficult to guarantee the molding quality of concrete edges and corners.
After the reinforcement of the side wall of the stair is completed, the inner side of the stair shall be reinforced with the support of the breast board and the protruding wooden edge of the wall.
The two long sides of the step top plate and step bottom plate are fixedly connected with the 1150 * 50 * 50 ㎜ batten.
After the elevation of the slab is adjusted, the verticality of the side wall of the stair shall be adjusted and the formwork shall be reinforced.
6.
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Cut two 1150 * 170 ㎜ step top plates and step bottom plates.
After the concrete is poured and formed and reaches the formwork removal strength, the formwork shall be removed, and the inner concave breast board shall be removed first, as shown in the figure.
3.
After the support and reinforcement of the concave breast board inside the stair and the reinforcement of the protruding wooden edge of the wall are completed, the finished hollow floor step shall be directly inserted with one side aligned with the protruding wooden block on the wall, and the other side aligned with the concave breast board on the inner side for downward insertion.
The construction process of on-site grooved assembly of stair step formwork solves the problems of stair step formwork running, tilting, and uneven internal and external corners, significantly reduces the labor intensity of workers, speeds up the construction progress, saves construction costs, and improves the molding quality of stair steps.
The construction stair step is 170 ㎜ high and 260 ㎜ wide.
4.
Reinforcement and bolt installation of the inner side of the stair Breast board Figure Reinforcement of the protruding wooden edge of the wall Figure 5.
Below is the diagram for verticality adjustment and reinforcement of the side wall of the stair.
2.
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Support the stair slab mode and adjust the elevation according to the drawings.
The following is the diagram of the step board inserted into the wall and the inner breast board of the groove.
8.
The concave breast board inside the stair is shown in the left figure below, and the slab elevation adjustment laying formwork is shown in the right figure below.
The following is the processing and manufacturing process of the assembled stair treads.
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After the stair step breast board is removed, protect the finished product, pay attention to the damage of stair step edges and corners, and finally remove the wall formwork.
Construction process 1.
Fix the processed batten on the corresponding position as the bolt of the stair step.
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