Failure to comply with executive maps: One of the most common mistakes is the inaccuracy of executing executive maps. This mistake can lead to the column levels, the mismatch of parts of the components, and ultimately reduced the strength of the structure.

Using inferior materials: Using inferior and poor quality materials, such as low quality steel or low -resistor concrete, can lead to weakness and decreased structures. It can lead to the failure of the structure. Failure to comply with welding standards, use of inappropriate electrodes and lack of quality of welding quality are common mistakes.

Failure to use safety equipment: Failure to use appropriate safety equipment by workers is another factor in accidents and reduced work quality.

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