How is the qualification grade of aerial work divided?

Secondary qualification standard: 1. The enterprise has undertaken the following two or more aerial work projects in recent five years, and the quality of the projects is qualified. (1) Cleaning and maintenance of structures or buildings with a height of more than 80m; (2) cleaning and maintenance of structures or buildings with a unit surface area of more than 5,000 square meters; (3) Cleaning and maintenance of structures or buildings with a single contract amount of more than 200,000 yuan. 2. The enterprise manager has more than 5 years working experience in project management or above intermediate title; Technical person in charge has more than 5 years experience in technical management of engineering construction and has intermediate professional and technical titles; The person in charge of finance has an intermediate or above accounting title. There are not less than 20 engineers and economic managers with professional titles in the enterprise, including not less than 15 engineers and technicians; Engineering and technical personnel, with intermediate or above titles of not less than 5 people. The enterprise shall have at least 3 project managers with the qualification of Grade II or above. There are not less than 30 professional and technical workers engaged in aerial work in the enterprise. 3. The registered capital of the enterprise is more than 800,000 yuan, and the net assets of the enterprise are more than 6,543,800 yuan. 4 enterprises in the past three years, the highest annual project settlement income of more than 2 million yuan. 5. The enterprise has construction machinery and quality inspection equipment suitable for the scope of contracted projects.

Level 3 qualification standard: 1. The enterprise has undertaken more than two aerial work projects in recent five years, and the quality of the projects is qualified. (a) the cleaning and maintenance of structures or buildings with a height of more than 50 meters; (2) cleaning and maintenance of structures or buildings with a unit surface area of more than 2000 square meters; (3) Cleaning and maintenance of structures or buildings with a single contract amount of more than 50,000 yuan. 2. The enterprise manager has more than 3 years of project management experience or has a junior title or above; Technical person in charge has more than 3 years experience in technical management of engineering construction and has intermediate professional and technical titles; The person in charge of finance has a junior or above accounting title. There are not less than 8 engineers and economic managers with professional titles in the enterprise, including not less than 5 engineers and technicians; Engineering and technical personnel, with intermediate or above titles of not less than 2 people. Enterprises should have at least three project managers with three or more qualifications. There are not less than 10 professional and technical workers engaged in aerial work in the enterprise. 3. The registered capital of the enterprise is over 300,000 yuan, and the net assets of the enterprise are over 400,000 yuan. 4 enterprises in the past three years the highest annual project settlement income of more than 600 thousand yuan. 5. The enterprise has construction machinery and quality inspection equipment suitable for the scope of contracted projects.