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How to prevent and solve the deformation of plywood?

In the daily use of plywood on construction sites, the deformation of the building template has always been a problem that plagued the builders. When buying a building template, in addition to paying attention to the quality of the product, you must also pay attention to protection during normal use. 


1. When using plywood and its supporting system, the construction personnel must fully consider their own rated load of their own weight and the lateral pressure generated by the concrete during the pouring process to ensure that the plywood has sufficient load capacity during use and must not be overloaded. 


2. Regarding the support at the bottom of the beam, first of all, the spacing should ensure that it does not deform under the weight of the concrete and the construction load. If the bottom of the support is a soil foundation, it must be compacted first, drainage ditches must be set up, and skids and steel should be laid to ensure that the support does not collapse. 


3. When assembling small steel molds, joints should be placed in accordance with regulations. The spacing and specifications of the cofferdam and the tension bolts should be set according to the design requirements. 


4. If the beam and column formwork uses cassettes, the spacing should be specified and the building formwork should be clamped, and its width should be slightly smaller than the section size. The upper part of the building formwork for beams and walls must have temporary support heads to ensure the width of the beams and walls when concrete is poured. 


5. When pouring concrete, it should be uniform without unloading, and the pouring height should be strictly controlled, especially on both sides of the building formwork of the door and window openings. It is necessary to ensure that the concrete is vibrated and dense, but also to prevent excessive deformation and cause deformation of the building formwork. 


6. For cast-in-place reinforced concrete beams and floor slabs with a span not less than 4m, the building formwork should be arched according to the design requirements; when there are no special requirements in the design, the arch height should be 1/1000-3/1000 of the span. 


7. When using wooden building templates and plywood building templates, concrete should be poured in time after receiving experience to prevent wooden building templates from deforming due to long-term exposure to rain. If you want to get more convenience, you can try to use plastic building templates.


ZMADTO Plywood Co.Ltd is focus on construction plywood & wood formwork product. Our factory was established in 1993 and covers an area of 240,000 square meters with an average daily output of more 30,000 pcs plywood. Besides, the factory has more than 200 advanced equipment. After years of continuous development, it has become a leading company in the international wood formwork industry and exported to more than 20 countries around the world.