1, understand the drawing principle and drawing standard of building construction drawing.

2, understand the composition of the house and the materials and practices of each part, can understand the main construction drawings of general construction projects.

3. Can calculate the construction area and general engineering quantity according to the construction drawing, and can count the number of commonly used components.

4. Be able to find obvious errors, omissions and contradictions between drawings.

Preliminary design:

The preliminary design drawings require a plan that can show the relationship between various parts and spaces in the building and the basic functional requirements, including the layout of horizontal and vertical traffic in the building, the intention to deal with the architectural modeling and internal space, the main relationship between the building and the surrounding environment, the choice of structural form and the preliminary consideration of main technical problems. The design drawings at this stage should clearly show the intention of the whole design scheme.