Precautions when using prestressed steel

time：2023-09-20 Views：89

Precautions when using prestressed steel

1. It is strictly prohibited to use any form of heating deformation measures during the use of prestressed steel to avoid reducing the mechanical properties of the prestressed steel.2. Welding is strictly prohibited during use, because the strength of the solder joint is much lower than the strength of the steel itself, and wire breakage at the solder joint may easily occur during tensioning.3. Cutting of prestressed steel should use toothless clamps (grinding wheel clamps).Cutting with electric welding can easily damage the surface around the steel.At the same time, it causes local heating at the end, which significantly reduces the performance.4. When the prestressed steel wire adopts circular reinforcement, its bending radius shall not be less than 3 times of the steel wire diameter.5. The steel strands packaged in rolls without shafts should be unwound from the inner ring in the standing state. After being pulled out, the steel strands will be spring-shaped and straighten automatically.Tapping direction: The spiral direction of the spring shape after tapping is consistent with the twisting direction of the stranded wire, otherwise the wire will be twisted or messed up.6. The twist direction of the steel strand is generally left twist. When right twist is used, it should be specified in the contract, otherwise it will directly affect the cooperation with the sight.

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