This project is the construction drawing of the main gate of a residential area, which should be an accessory building according to the actual nature. The project has 1 floor above the ground, and the total building area is; 142 square meters, covering an area of 142 square meters. Specific functions: the first floor is the gate duty room and the monitoring room. This set of drawings is a complete construction drawing of the building, specifically including design instructions, decoration practices, single plane, elevation, section and