The height of the construction gate is the lowest.

The door leaf is a sealed door with rollers at the bottom, which can be made into a horizontal door or a sliding door. The height of the upper frame of the door leaf is 2000mm, and the clear distance between columns is 4000 ~ 6000 mm It is not allowed to open the door on the door leaf. Doors (900mm wide and 2000mm high) are set on the outside of the doorpost, and six cards and one painting are set on one side of the doorpost. The height of the doorposts on both sides is 3000mm (excluding the emblem), the width of the front of the doorpost is 600mm, and the head of the doorpost is an inverted trumpet-shaped square top with a size of 900mm× 900mm× height100 mm.

Building construction refers to the production activities in the implementation stage of engineering construction, which is the construction process of various buildings. It can also be said that all kinds of lines on the design paper have become objects in the designated places. Including foundation engineering construction, main structure construction, roof engineering construction, decoration engineering construction, etc. The construction site is called "construction site" or "construction site", also called the construction site.