1. The steel pipe has 60 sizes, and the utilization value is low;
2. In the use process, the labor cost is increased;
3. Inconvenient management and easy to lose;
4. The length of the steel pipe is up to 6 meters/root, which increases the safety risk;
5. Fasteners are easy to lose, and maintenance and maintenance costs are high;
6. The construction site is in disorder and fails to meet government requirements.