CAD drawing standards found online

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The standards found online seem to be those for gardens, but since the courtyard doesn’t have its own standards, we’ll just make do with them. I. General Provisions 1. Objectives of Work 1.1 Standardization – Effectively improving the quality of architectural design work ； 1.2 Standardization – Improving work efficiency in architectural design ； 1.3 Networking – facilitates standardized management and sharing of results on the network. 2. Scope of application: This standard is a unified set of rules for architectural CAD drawing, and it is applicable to CAD drawing and software development in the fields of building construction and construction-related areas within our institute. 3. Work style: This standard aims to establish a unified style for drawing presentations in design institutes; individual drawing styles are not encouraged. The representation in architectural drawing should be clear, complete, and consistent. II. Drawing 1. Drawing Standards Engineering drawings must be prepared in strict accordance with **the relevant building drawing standards, requiring that the presentation style of all drawings remain consistent. 2. List of drawings: The lists of drawings for various specialties are prepared in the following order: Architectural specialty: Architectural design specifications ； List of interior decorations ； List of building construction methods ； Building layout plan ； Floor plan ； Elevation view ； Cross-section ； stairs ； Partial plane ； Building details ； Doors and Windows Table ； Door and window diagram. Structural Engineering: Structural Design Specifications ； Pile location map ； Base map ； Foundation details ； Basement structure diagram ； (Civil air defense drawings) ； Detailed basement structure drawings ； Floor structure layout ； Floor reinforcement diagram ； Detailed drawings of beams, columns, slabs, and stairs ； Detailed drawings of structural members. Electrical Engineering: Electrical Design Specifications ； List of main equipment and materials ； Floor plan ； Detail drawing ； System diagram ； Control circuit diagram. Large-scale projects should have separate catalogs for strong current, weak current, fire alarm, and their intelligent systems. Water supply and drainage specialty: Water supply and drainage design specifications ； General layout ； Floor plan (bottom to top) ； Detail drawing ； Pump water, fire protection, drainage, and rainwater system diagrams. HVAC Specialty: HVAC Design Specifications ； List of main equipment and materials, floor plan ； Cross-section ； Detail drawing ； System diagram. 3. Drawing depth: In addition to meeting the depth requirements specified in the **standards**, engineering drawings must also comply with the depth standards set out in the example drawings provided by the owner, as well as any special requirements. 4. Drawing fonts: Except in cases of bidding or special circumstances, the following font files should be used; try to avoid using TrueType fonts in order to speed up the display of the drawings and reduce the size of the drawing files. The number of font types in the same graphic file should not exceed four. The font files listed below are standard fonts; simply place them in the FONTS directory of the CAD software. Romans.shx (Western script italic), romand.shx (Western script italic), bold.shx (Western script bold), txt.shx (Western script regular), simpelx (Western script regular), st64f.shx (Chinese Song typeface), ht64f.shx (Chinese bold typeface), kt64f.shx (Chinese regular typeface), fs64f.shx (Chinese Fangsong typeface), hztxt.shx (Chinese regular typeface). Chinese font styles should preferably use hztxt.shx and hzst.shx ； Western languages give priority to romans.shx and simplex or txt.shx. All annotations in Chinese and English should be carried out in accordance with the table below. Table of Common Font Styles Table 1 Purpose Font Height Width Ratio Drawing Name Chinese St64f.shx 10mm 0.8 Title of explanatory text Chinese St64f.shx 5.0mm 0.8 Annotation text Chinese Hztxt.shx 3.5mm 0.8 Explanatory text Chinese Hztxt.shx 3.5mm 0.8 General description Chinese St64f.shx 5.0mm 0.8 Dimensions annotated in English Simpelx.shx 3.0mm 0.8 Note: The ratio between Chinese and English text is set at 1:0.7; explanatory text should generally be placed on the right side of the drawing. The font height is the height after the image is printed. 5. Drawing versions and modification marks 5.1 Drawing versions: Version markers shall be used for drawing modifications, and the previously used numbering markers such as construction, completion, electrical, plumbing, heating maintenance, etc., shall no longer be employed. 5.1.1 Construction drawing version numbers: The version number for the first release of the drawings is 0; the version number for the second set of revised drawings is 1, and the version number for the third set of revisions is 2. 5.1.2 Version numbers for non-construction drawings such as concept drawings or drawings submitted for approval: The version number for the first set of such drawings is A, the version number for the second set is B, and the version number for the third set is C. 5.2 Markings for drawing modifications: Drawing modifications can be distinguished by version numbers; each modification must be marked at the relevant location along with the corresponding version number. A simple or single modification still requires a change notice. 6. Sheet size: 6.1 The standard sheet sizes are A0, A1, A2, and A3, with A1 being the most commonly used. Sheet size specifications Table 2 Sheet type Sheet width (mm) Sheet height (mm) Remarks A0 1189 841 A1 841 594 A2 594 420 A3 420 297 A4 297 210 Mainly used for catalogs, changes, modifications, etc. 6.2 For special requirements, dimensions can be increased by 1/8 of the module along the longer side (in accordance with the Unified Standards for Building Drawing). 6.3 For the drawings used in a specialty, there should not be more than two paper sizes (with the A4 size used for catalogs and tables being an exception). 6.4 Drawing scales The commonly used scales are as follows; on the same drawing, it is not advisable to use more than three different scales. Common scale tables Table 3 Common scales: 1:1, 1:2; 1:5, 1:10, 1:20, 1:50, 1:100, 1:200, 1:500, 1:1000. Available scales: 1:3, 1:15, 1:25; 1:30, 1:150, 1:250, 1:300, 1:1500. 7. Layer and file exchange formats 7.1 The purpose of using layers is to organize, manage, and exchange the solid data of CAD drawings, as well as to control the screen display and print output of those solids. Layers have attributes such as color, line style, and status. 7.2 Layer organization can adopt different methods depending on various purposes, stages, entity attributes, and users, but it should maintain a certain level of logic to facilitate operation. Various entities should be placed on different layers; for example, in a floor plan, axis labels and the third set of dimensions should be labeled on separate layers, while the detailed dimensions of doors and windows should also be shown on separate layers ； Sinks, toilets, and related fixtures, along with their labels, are represented on separate layers ； Dimensions such as scale should also be represented in separate layers. 8. Supplementary Notes 8.1 Common Legends: In accordance with the Unified Standards for Building Drawing (GBJ186), the Standards for General Plan Drawing (GBJ103-87), and the legend provisions in the Standards for Architectural Drawing (GBJ104-87). Common legends: Table 4. 1: Masonry; 2: Concrete; 3: Compacted soil; 4: Porous materials; 5: Fiber materials. 8.2 Line width (unit: mm). All construction drawings shall be drawn using the line widths specified in Table 5. Line width of drawings: Table 5 – Groups, types: architectural drawings, structural drawings, electrical drawings, plumbing drawings, HVAC drawings. Thick lines: 0.50, 0.60, 0.55, 0.60, 0.60; Medium-thick lines: 0.25, 0.35, 0.35, 0.40, 0.40; Thin lines: 0.15, 0.18, 0.20, 0.20, 0.20. When using CAD technology for drawing, it is advisable to use colors to control the width of the drawing lines, and to use lines with defined widths such as PLINE as little as possible, in order to speed up the display of the graphics and reduce the size of the graphic files. 8.3 Symbols 8.3.1, Axes. The axis circles should always be drawn as solid thin lines. The diameter of the circle is 8 mm. 8.3.2, Cutting lines; 8.3.3, Index symbols – The circles and diameters of index symbols shall be drawn as thin solid lines. The diameter of the circle is 10 mm. 8.3.4, Details: Detail symbols are drawn with thick solid lines, with a diameter of 14 mm. 8.4 Lead lines: The lead lines are all thin horizontal lines 0.25 wide, with textual descriptions placed above the horizontal lines. 8.5 Dimensioning: Dimension lines and extension lines shall be drawn as thin solid lines, with their ends extending 2 mm beyond the relevant points. The dimension start and end symbols are drawn with medium-thick lines; their inclination is 45° clockwise relative to the dimension lines, and their length is 2–3 mm. Dimensioning is carried out in the following manner: 8.6 – Elevation level; 8.7 – Drawing title (font size: 10 mm); 8.8 – Initial settings for computer-aided architectural drawing: initial settings, wall line settings, window styles on floor plans, four-line format. Wall line thickness: W = 0.50; Door styles on floor plans: “Fully open” marked with A; Thickness of left wall: L = 120; Style for dimension lines: thick line, M; Thickness of right wall: R = 120. Definitions for text formatting: Text height, aspect ratio. For doors and windows: A = 2.50, 0.8; For dimensions B: 2.50, 0.8. Notes: 1. The scale of all drawings is 1:100. 2. To reduce memory usage in the drawings and ensure standardization and consistency in frame files, it is recommended to use external reference commands to include these frame files. Method: XREF (external reference), ATTACH (attach); select the drawing file for the reference and click. 9. Tables of doors, windows, and materials (see appendix). 10. Naming rules for drawing files: CAD files should be named in a simple, clear, and memorable manner to facilitate data exchange. Design drawings can be named according to the type of design work and the order of the drawing catalog. For example, architectural drawings are denoted as J1, J2..., with ‘C’ added for preliminary designs, such as JC1, JC2...; structural drawings are labeled as G1, G2..., with ‘C’ added for preliminary designs, such as GC1, GC2...; electrical drawings are denoted as E1, E2..., with ‘C’ added for preliminary designs, such as EC1, EC2...; plumbing and drainage drawings are marked as S1, S2..., with ‘C’ added for preliminary designs, such as SC1, SC2...; ventilation drawings are denoted as H1, H2..., with ‘C’ added for preliminary designs, such as HC1, HC2..., etc.