How to make a drawing with cad in building construction?

There are several methods in the traditional construction setting-out process:

2. 1 Czochralski method: It is used when the straight line distance and arc radius are small, and its characteristics are simple and easy to operate and master. But there are several aspects that need to be grasped.

2a Set the center pile position correctly according to the requirements of the general plan (this is also the key of CAD drawing).

2b The middle pile should be stable. If the middle pile is cement concrete, a round nail should be nailed on the middle pile. Bury a short round steel. At the same time, the central pile should be properly protected.

2c Before drawing, set round nails (steel bars) with steel ruler, and the steel ruler shall be consistent in tightness.

Overview of development:

In 1950s, the first computer drawing system was born in America, and passive computer-aided design technology with simple drawing output function began to appear.

In the early 1960 s, CAD surface patch technology appeared, and commercial computer drawing equipment was introduced. In 1970s, a complete CAD system began to take shape. In the later period, raster scanning display which can produce realistic graphics appeared, and various forms of graphic input devices such as manual cursor and tablet were introduced, which promoted the development of CAD technology.