Foreword

TCVN 6083:2012 replaces TCVN 6083:1995 (ISO 7519:1991).

TCVN 6083:2012 is completely equivalent to ISO 7519:1991.

TCVN 6083:2012 is converted from TCVN 6083:1995 (ISO 7519:1991) according to the regulation in Clause 1, Article 69 of the Law on Standards and Technical Regulations and Point b), Clause 1, Article 6 of the Government’s Decree No. 127/2007/ND-CP dated August 1, 2007 detailing the implementation of some articles of the Law on Standards and Technical Regulations.

TCVN 6083:2012 is compiled by the Institute of Architecture, Urban and Rural Planning – Ministry of Construction, proposed by the Ministry of Construction, appraised by the Directorate for Standards, Metrology and Quality, and announced by the Ministry of Science and Technology.

1. Scope

This standard sets out general principles for the presentation of construction drawings, general arrangement and assembly drawings, mainly used in building and architectural drawings.

2. Normative references

The following referenced documents are indispensable for the application of this standard. For dated references, only the cited edition applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

TCVN 8, Technical drawings – General principles of presentation.;

TCVN 5896 : 2012[1]), Construction drawings – Arrangement of views, lettering and title blocks on drawings.

ISO 129, Technical drawings – Dimensioning – General principles, definitions, methods of execution and special indications.

3. General principles

3.1. Building components that have been detailed or specifically defined in other documents (e.g. component drawings, detail and technical drawings) may be presented very simply in general arrangement and assembly drawings.

3.2. The degree of simplification depends on the type of object to be presented, the scale of the drawing and the purpose of the documentation.

3.3. In simplified presentation, only the most essential characteristic lines should be presented, and if possible, only the outlines. The object to be drawn shall be presented to the specified scale.

3.4. Drawings in simplified presentation may be supplemented by graphic symbols, conventional symbols and annotations.

3.5. In the annotation area of the drawing, reference shall be made to the technical specification documents used for manufacturing, construction and assembly (see TCVN 5896 : 2012).

4. Lines

4.1. Line types and styles shall comply with TCVN 8 and be supplemented with an extra thick line type.

4.2. The extra thick line type is used to emphasize certain parts.

4.3. The thickness of the lines used is as follows:

– Thin line: With a relative thickness of 1;

– Thick line: With a relative thickness of 2;

– Extra thick line: With a relative thickness of 4.

4.4. Two or three line types of different thickness may be used on the same drawing.

4.5. Outlines of sectioned parts shall generally be drawn with a thicker line than the lines in the views (See Figure 1).

For sectioned parts, either a continuous thick line (TCVN 8, line type A) or a continuous extra thick line may be used.

For viewed parts, a continuous thick or thin line may be used (see TCVN 8, line type A or B) depending on the line thickness used for the sections (the ratio of line thicknesses shall be 1/2).

Figure 1 – Example of outlines for sectioned and viewed parts

4.6. To differentiate between sectioned parts or between sectioned and viewed parts, different line thicknesses may be used, or hatching or shading (See Figure 1) on the areas of the sectioned parts.

4.7. Outlines between different materials in views shall be drawn with continuous thin or thick lines (TCVN 8, line type B or A) (See Figure 2).

Material patterns such as marble or parquet flooring are not usually shown; where necessary, they may be presented in a separate drawing.

4.8. Sloping floors and roofs are shown on plan drawings with continuous thin lines (TCVN 8, line type B). Where necessary, levels may be indicated by numbers in accordance with ISO 129 and slopes by arrows pointing downwards together with the ratio of the slope (See Figure 3).

4.9. Staircases are shown on plan drawings as follows (See Figure 4):

a) Stairs are drawn with continuous thin lines (TCVN 8, line type B);

b) Upward pointing arrow is placed in the middle of the stairs and drawn with continuous thin lines (TCVN 8, line type B) with a dot indicating the bottom of the flight and the arrowhead pointing to the top of the flight;

c) The cut on the landing is represented by a dashed line (TCVN 8, line type D) (See Figure 4). Where no misunderstanding is possible, the zigzag may be omitted.

d) If necessary, the levels of the landings may be indicated by numbers or the steps numbered in ascending order, the lowest step being number 1.

Figure 4 – Staircase

4.10. Ramps are shown on plan drawings as follows (See Figure 5):

a) Ramps are drawn with continuous thin lines (TCVN 8, line type B);

b) Upward pointing arrow is placed in the middle of the ramp and drawn with continuous thin lines (TCVN 8, line type B) with a dot indicating the lowest level and the arrowhead pointing to the highest level;

c) Where necessary, the highest and lowest levels may be indicated by numbers in accordance with ISO 129 or the slope ratio may be indicated.

Figure 5 – Ramp

5. Simplified presentation of doors and windows

5.1. Doors and windows are drawn with continuous thin or thick lines (TCVN 8, line type B or A).

5.2. The opening direction of doors shall be shown. The opening direction of hinged doors is shown on the drawing with the door leaf at an angle of 30° without an arc or at 90° with an arc (See Figure 6).

5.3. On drawings with large scales (1/50 and larger), doors and windows are drawn to show the type of door, arrangement of leaves, sill, etc. (See Figure 6)

Figure 6 – Example of doors and windows on large-scale plan drawings

NOTE: Window panes may be represented by continuous thin lines (TCVN 128, line type B).

Figure 6 (end)

5.4. On small-scale drawings and drawings used in the preliminary design phase, doors and windows are drawn more simply than specified in 5.2 and 5.3 (See Figure 7).

NOTE: Window panes may be represented by continuous thin lines (TCVN 128, line type B).

Figure 7 – Example of doors and windows on small-scale plan drawings

6. Conventional features

6.1. Suspended ceilings

Suspended ceilings are drawn on plan drawings with diagonal thin chain double-dashed lines (TCVN 8, line type K). The underside level of suspended ceilings is indicated by a number or by the room height (See Figure 8).

The outline of freehanging suspended ceilings away from the walls shall be drawn with thin chain double-dashed lines (TCVN 8, line type K) (See Figure 8).

Figure 8 – Suspended ceiling

6.2. Openings, voids and wall recesses

6.2.1. Where necessary, openings and voids in views and sections are represented by two diagonals drawn with continuous thin lines (TCVN 8, line type B). These diagonals may also be omitted if the meaning of the symbol is clear within the scope of the issues involved (See Figure 9).

6.2.2. Where necessary, wall recesses in sections and views are represented by one diagonal drawn with continuous thin lines (TCVN 8, line type B). This diagonal may also be omitted if the meaning of the symbol is clear within the scope of the issues involved (See Figure 10).

7. Arrow symbols

7.1. Arrow symbols are used to indicate various necessary information.

7.2. Arrow symbols may be drawn with continuous thin, thick or extra thick lines depending on the importance of the intended symbol (see Figure 11).

Figure 11 – Examples of arrow symbols

[1] TCVN to be published