There is no rule for this, it can only be determined according to the design standard of civil construction, decoration and installation.
The safety production cost extraction standards for each project category are as follows:
(a) 2.0% for building construction projects, mining (shafts and alleys) projects;
(b) 1.5% for electric power projects, water conservancy and hydroelectricity projects, and railroad projects;
(c) 1.5% for municipal utility projects, smelting projects, electrical and mechanical installation projects, chemical and petroleum projects, port and waterway projects, and railroad projects. Engineering, harbor and waterway engineering, highway engineering, communication engineering is 1.0%.
Specifically, it includes:
Environmental Protection Fee: Dust-proof net on the construction site, disposal of domestic waste of the project.
Civilized construction fee: "five signs and one map", measures to prevent heatstroke and other.
Safety construction cost: safety helmet, safety belt, safety net, guardrail and so on.
Temporary facilities fee: movable boarding house in the construction site, etc.
Land use fee
Any construction project is fixed in a certain location connected to the ground and must occupy a certain amount of land, and it is inevitable to incur the cost of obtaining the land for construction and pay for it, which is the land use fee. It refers to the land acquisition and relocation compensation paid through the allocation of land use rights, or through the land use rights of the land use rights of the land use rights of the land use rights of the land use rights of the land use rights of the land use rights of the land use rights of the land use rights of the payment of concessions.
Fees paid in accordance with the provisions of the Land Management Law of the People's Republic of China and the State of China. The sum thereof shall generally not exceed 20 times the annual production value of the land to be expropriated, while the annual production value of the land shall be calculated on the basis of the average production of the three years prior to the expropriation of the land and the price stipulated by the State.
Reference: Baidu Encyclopedia-Other Costs of Engineering Construction