70% of mistakes made by newcomers in design institutes! Do you really understand CAD drawing?

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With the arrival of the graduation season, various design firms and corporate design departments in China have also welcomed some new CAD drafting practitioners. Recently, a colleague from the design firm said with a worried expression, \"The new young employees are not adapting well to the CAD drawing work in the firm; they even get the basic CAD building drafting standards wrong!\" ”This may seem a bit exaggerated, but it prompts reflection: do you really understand CAD? In addition to the **general drawing standards, namely the ‘Unified Standards for Building Drawing’ GB/T 50001–2017 and the ‘Building Drawing Standards’ GB/T 50104–2010, many design institutes have their own drawing standards and specifications in practice, which differ from these **standards. If your organization has its own standards, you should draw the diagrams in accordance with those standards. Of course, if there are no corresponding standards, you should still follow the **standards** when creating CAD drawings. Below, the editor has also selected 3 common mistakes made by CAD beginners, and will explain them in detail for everyone. CAD Building Drawing Standards 1: Line Widths, Line Types. Line type/line width/line width ratio/purpose: In architectural CAD drawings, different line widths and types are typically used to distinguish various elements of the building design and to convey different levels of detail. Some medium to large design institutes have very detailed regulations regarding aspects such as line width, the color of line layers, and whether the output should be in a faded style. If such regulations are not available, the settings can be carried out according to the **standards shown in the figure below, in order to make the preparation of CAD drawings as standardized and regulated as possible. (Image source: **Books on drawing standards) (Image source: **Books on drawing standards) When using HaoChen CAD Architecture or HaoChen Cloud Architecture software for CAD drawing, you only need to set the color of the layer on which the lines are located; there is no need to distinguish between different line widths ； When printing the output, it is sufficient to set different print widths for lines of different colors. Furthermore, there is usually a print style file in the design institute, which you can import into the software. This is a convenient aspect of using Haochen CAD: it simplifies the implementation of standards and makes it easy to standardize things quickly. 2. Fonts: There are detailed regulations in the standards regarding font types, font sizes, and output scaling. HaoChen CAD Architecture and HaoChen Cloud Architecture come with default specifications that can be used directly. If you need to customize the specifications, you can also achieve this quickly by setting the relevant options. (Image source: **Books on drawing standards**) HaoChen Software’s text objects automatically adjust to the appropriate font size based on the different printing scales, which is very convenient. Therefore, when generating the drawings, you only need to confirm the scale at which they will be produced; the text, annotations, drawing titles, indices, and other elements in HaoChen CAD for architecture will be adjusted accordingly based on that scale. (The font size changes according to the scale.) 3. Scale drawing types/drawing detail levels: Different scales are used to represent various parts; below are some of the commonly used drawing scales, as shown in the table. Drawings with different scales have varying degrees of detail. A. When the scale is greater than 1:50, it is necessary to include legends for various materials; moreover, plaster lines should be drawn on both sides of elements such as walls and floors to indicate the thickness of the plaster layer. B. When the scale is 1:50, the lines of the floor and roof finishes should be drawn; the lines of the plaster finish should be drawn as needed. C. A simplified material key (such as blackening for reinforced concrete) can be used when the scale is 1:100~1:200, but it is advisable to draw the lines of the floor and roof finishes. In HaoChen CAD Architecture and HaoChen Cloud Architecture software, you can set it so that when the scale exceeds a certain value, the interface switches to detail mode, and material legends are displayed automatically. This allows various drawings at different scales to be created in just one drawing session, which is very convenient and fast. (Detail mode) Well, after reading this CAD tutorial, do you have a deeper understanding of CAD drawing work now?