In construction, column formwork is a very important component. Good construction specifications can ensure the safety and aesthetics of the column formwork while improving construction efficiency. This article will introduce the specifications for column formwork construction and the issues that need attention.
Column formwork mainly uses plywood and expanded polystyrene boards. For small columns, wooden rods can be used. When selecting column formwork, the following points should be noted:
The boards should be flat, crack-free, and burr-free. When using plywood, the bonded parts of the boards should also be considered.
In the case of using expanded polystyrene boards, soft boards should be selected to avoid damage during removal.
Local reinforcement of column formwork can be done using steel bars, bricks, or concrete.
Column formwork needs to be erected in a certain sequence. First, select the top of a particular column, and then process the boards according to the elevation and dimensions. When erecting column formwork, the following points should be noted:
The bottom and top of the column formwork must be higher than the actual column height.
When using expanded polystyrene boards, attention should be paid to the relationship between board thickness and load-bearing capacity. Generally, the board thickness should exceed 150 mm.
Plywood needs to be reinforced and span larger distances to aid in the stability of the formwork.
After the column formwork is erected, the steel formwork should be fixed to ensure its stability and prevent the impact of prestressed tendons on the column formwork during construction.
The removal of the column formwork needs to be done after a certain period following concrete pouring. It should be noted that before removing the column formwork, the concrete must be cured and meet the load-bearing requirements of the specific part of the project. Maintenance of the column formwork should focus on enhancing its stability. Especially during the rainy season, waterproof measures need to be taken, and the formwork should be protected against moisture and lightning.
In summary, the erection and removal of column formwork need to follow certain specifications to ensure operational stability. When selecting column formwork materials, attention should be paid to the quality and stability of the boards to ensure the aesthetics and safety of the column formwork. During construction, attention should also be given to the safety of the workers to avoid accidents during column formwork operations.
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