1. Single project: office building, teaching building, library, canteen, dormitory, etc. A school.

2. Unit project: Civil engineering, equipment installation engineering and industrial pipeline engineering in industrial plant engineering are different unit projects included in a single project.

3. Sub-projects: foundation and foundation engineering, main structure engineering, decoration engineering, roofing engineering, water supply and drainage and heating engineering, electrical engineering, intelligent building engineering, ventilation and air conditioning engineering and elevator engineering.

4. Sub-project: it is a part of sub-project such as earthwork excavation, earthwork backfilling, reinforcement engineering, formwork engineering, concrete engineering, brick masonry engineering, wooden doors and windows manufacturing and installation engineering, glass curtain wall engineering, etc.

Extended data:

Construction projects are divided into single projects, unit (sub-unit) projects, division (sub-division) projects and sub-projects

1. unit project: buildings and structures with independent construction conditions and independent use functions.

2, a single project refers to a construction project, with independent design documents, after the completion of an independent production capacity or efficiency of a complete set of projects. A single project is an integral part of a building project. A construction project can include only one single project or multiple single projects.

3. Sub-project: Sub-project refers to the project that can't exert its ability or benefit independently, has no independent construction conditions, but has the conditions to settle the project price. Division project is an integral part of unit project. Usually, a unit project can be divided into several sub-projects according to the components of its engineering entity.

4. Subproject: Subproject refers to the subdivision of subprojects, and is the basic project that constitutes subprojects, also known as subprojects or subprojects. It is a kind of construction project or installation project, which can be produced through a relatively simple construction process and can be calculated with appropriate measurement units. Generally speaking, construction projects are divided according to different factors, such as the selected construction method, the materials used and the specifications of structural members.

References:

Baidu encyclopedia-unit project