Article 3 A special safety construction plan (hereinafter referred to as the special plan) shall be prepared for a division or sub-project with greater risks.

The scope of dangerous sub-projects

A, foundation pit supporting and dewatering engineering

Foundation pit (trough) support and dewatering engineering with excavation depth exceeding 3m (including 3m) or not exceeding 3m, but complicated geological conditions and surrounding environment.

Second, the earthwork excavation project

A little.

Three, template engineering and support system

A little.

Four, lifting and installation and disassembly engineering

A little.

Five, scaffolding engineering

(a) the erection of floor-type steel pipe scaffolding with a height of more than 24m.

(2) Attached integral and segmental lifting scaffolding project.

(3) Cantilever scaffold project.

(4) Hanging basket scaffold project.

(5) Self-made unloading platform and mobile operation platform project.

(six) new and special scaffolding engineering.

Six, demolition and blasting engineering

A little.

Seven. others

(a) building curtain wall installation project.

(2) Installation of steel structure, grid structure and cable-membrane structure.

(3) Artificial excavation of belled piles.

(four) underground excavation, pipe jacking and underwater operation projects.

(5) Prestressed engineering.

(six) the use of new technologies, new processes, new materials, new equipment and there is no relevant technical standards for the greater risk of partial projects.