1. There are GOST working (executive) sizes, each of which is used in the manufacture of the product and its acceptance (control), and reference, indicated only for greater ease of use of the drawing. Reference dimensions are marked with a "*", and in technical requirements, located above the main inscription, write: "* Size for reference"
2. It is not allowed to repeat the dimensions of the same element on different images
3. Linear dimensions in the drawings are indicated in millimeters, without indicating the unit of measurement, angular - in degrees, minutes and seconds, for example: 4 °; 10°30’24”.
4. To apply dimensions in the drawings, dimension lines are used, limited at one or both ends by arrows or serifs. Dimension lines are drawn parallel to the object, the size of which is indicated.

Extension lines are drawn perpendicular to the dimension lines, except when they, together with the measured segment, form a parallelogram. It is impossible to use contour lines, axial and extension lines as dimension lines.

5. The minimum distance between parallel dimension lines is 7 mm, and between the dimension line and the contour line is 10 mm. It is necessary to avoid intersection of dimension lines between themselves and extension lines. Extension lines should extend beyond the ends of the arrows or serifs by 1 ... 5 mm.

6. Dimensional arrows on the drawing should be approximately the same.

7. Dimensional numbers are applied above the dimension line as close as possible to its middle. When applying the size of the diameter inside the circle, the dimension numbers are shifted relative to the middle of the dimension lines.

8. When in large numbers parallel or concentric dimension lines, the numbers are shifted relative to the middle in a checkerboard pattern.

9. Dimensional numbers of linear dimensions with different slopes of dimension lines are arranged as shown above. If it is necessary to indicate the size in the shaded area, then the dimension number is applied on the shelf of the line - callouts.

For training drawings, the height of dimensional numbers is recommended to be 3.5 mm or 5 mm, the distance between the numbers and the dimension line is 0.5 ... 1 mm.

10. If there is not enough space for arrows on the dimension lines located in a chain, the arrows are replaced by serifs applied at an angle of 45 degrees to the dimension lines or dots, but arrows are drawn outside.

11. If there is not enough space for the arrow due to a closely spaced contour line, the latter can be interrupted.

12. Angle dimensions applied as shown above. For corners of small sizes, dimensional numbers are placed on the shelves of lines - callouts in any zone.

13. If it is necessary to show the coordinates of the vertex of the rounded corner or the center of the rounding arc, then extension lines are drawn from the point of intersection of the sides of the rounded corner or from the center of the rounding arc.

14. If a view or section of a symmetrical object or individual, symmetrically located elements is depicted only up to the axis of symmetry with a break, then the dimension lines related to these elements are drawn with a break, and the break of the dimension line is made further than the axis or break of the object, and the size is indicated full.

15. Dimension lines can be drawn with a break and when specifying the size of the diameters of the circle, regardless of whether the circle is shown in full or in part, while the break in the dimension line is made further than the center of the circle.

16. When depicting a product with a gap, the dimension line is not interrupted.

17. Dimensional numbers cannot be divided or crossed by any lines of the drawing. Axial, center lines and hatching lines at the place where the dimension number is applied can be interrupted.

18. Before the dimension number of the radius is placed capital letter R. It cannot be separated from the number by any drawing line.

19. The dimensions of the radii of the outer and inner fillets are applied as shown below. The method of application determines the situation. Fillets that are sized must be drawn. Fillets with a radius size (in the drawing) less than 1 mm are not shown.

20. In cases where it is difficult to distinguish a sphere from other surfaces in the drawing, the word “Sphere” or the sign ○1420 are applied. The diameter of the sphere sign ○ is equal to the size of the dimensional numbers in the drawing.

21. The size of the square is applied as shown below. The height of the sign is equal to the height of the dimensional numbers in the drawing.

22. If the drawing contains one image of the part, then the size of its thickness or length is applied, as shown in the above.

23. The dimensions of the product are always applied real, regardless of the scale of the image.

24. Dimension lines are preferably applied outside the outline of the image, placing, if possible, internal and external dimensions on opposite sides of the image. However, dimensions can be applied inside the outline of the image, if the clarity of the drawing does not suffer from this.

25. When applying the size of the diameter of a circle, the sign Ø is an additional means for explaining the shape of an object or its elements, which are a surface of revolution. This sign is affixed before the size number of the diameter in all cases.

In some cases, using this sign, you can avoid unnecessary images. Thus, the use of the Ø sign allowed for a detail to be limited to one image.

Sizing sequence:

1. Element dimensions - the dimensions of each surface included in this part. These dimensions are placed on the image where this surface is better readable.
2. Coordinating dimensions - the dimensions of the binding of the centers of some elements to others, center-to-center, center-to-center.
3. Overall dimensions - the total height, length and width of the products. These dimensions are located farthest from the part outline.

According to the standards in force in our country, all dimensions on technical drawings must be placed in strict accordance with certain rules, requirements and standards. In accordance with them, all those dimensional numbers that are located above the dimension lines should be applied closer to their middle parts. In cases where there are several concentric or parallel dimension lines in the drawing, the dimension numbers must be applied in a checkerboard pattern.

The standards also state that when applied to blueprints remote and dimension lines intersections should be avoided. Those arrows that limit the dimension lines must be depicted in such a way that with their tip they rest against the contour, axial or extension lines.

Extension lines should extend beyond the ends of the arrowheads to a distance of 1 to 5 millimeters. As for the option like minimum distance, which should be between dimension lines located parallel to each other, then it is equal to 7 millimeters. Minimum distance between contour line and dimension line should be 10 millimeters. The specific values ​​of these parameters in each individual case are selected depending on the saturation of the drawing and the size of the image.

Location of dimensions on the drawing

If all dimensions to be specified on the drawing, refer to the same structural element of the displayed part (hole, protrusion, groove, etc.), then it is best to place them in the place where it is visually depicted most fully, and grouping all the necessary values.

Dimensioning a feature

Allowed dimensioning directly on dimension lines that have some slope relative to the horizontal or vertical. In cases where it becomes necessary to apply one or another dimension in the area that is shaded, it should be placed on the leader shelf.

Location of dimension numbers at different slopes

An example of applying a linear dimension

As for such elements as limit deviations and dimensional numbers, then, according to current standards, they cannot be separated or crossed by any lines available in the drawings. In addition, it is unacceptable to break the contour line in order to apply a dimension number. You can also not place it in those places where center, center or dimension lines intersect.

Dimensioning a hatch

Dimensioning example

If there is such a need, then it is allowed to apply dimensions with an offset. In such cases, extension and dimension lines form a parallelogram along with the segment that is being measured.

A plan is an image of a section of a building, dissected by an imaginary horizontal plane passing at the level of window and doorways each floor (Fig. 1).

Fig.1. The concept is a floor plan.

The building plan gives an idea of ​​the configuration and dimensions of the building, reveals the shape and location of individual rooms, window and door openings, piers, main walls, columns, stairs, partitions.

Attention should be paid to the difference in the connection of external and internal main walls and main walls and partitions (Fig. 2).

Rice. 2. Attachment of external and internal main walls and main walls and partitions

When choosing the thickness of the stroke lines, it should be taken into account that load-bearing structures, in particular, partition structures, are drawn with lines of a smaller thickness than load-bearing main walls and columns.

The symbol for window and door openings with and without filling is depicted in accordance with GOST 21.501-2011.

When drawing a plan on a scale of 1:50 or 1: 100, if there are quarters of them in the openings conditional image show on the drawing.

A quarter is a ledge in the upper and side parts of the openings brick walls, reducing airflow and facilitating the fastening of window frames (Fig. 3).

Rice. 3. A quarter in door and window openings.

On the floor plans, apply and indicate:
– coordination axes buildings with markings;
- marks of clean floors located on different levels;
- the direction and magnitude of the slope of the floors;
- the thickness of walls and partitions and their binding; dimensional chains: external and internal, conduct;
- all (regardless of size) openings, openings, niches in walls and partitions with required dimensions and bindings, except as provided in other drawings. For openings with quarters, dimensions are shown on the smallest side of the opening. The dimensions of the doorways in the partitions are not shown on the plans;
- the areas of the premises are put down in the lower right corner of the floor plan and underlined with a solid thick line. Areas are indicated in square meters with two decimal places;
- numbers of rooms in circles with a diameter of 6-8 mm, corresponding to the numbers of the names of the rooms and give them in the explication;
- structures (for example, platforms, mezzanines) located above the cutting plane are shown schematically by a dash-dotted line with two points.

The floor plan of the building is recommended to be drawn in the following sequence (Fig. 4):
a) apply a grid of coordination axes;
b) draw the outer and inner walls of the building, partitions and columns, if any;
c) show window and door openings, the direction of door opening, flights of stairs, sanitary appliances, etc.;
d) apply extension and dimension lines;
e) put down the dimensions and marks of the axles, make all the necessary inscriptions;
d) after verification and refinement, outline the contours of the sections - with a solid main line, the rest - with a solid thin line.

Rice. 4. The sequence of the design of the floor plan.

As a rule, invisible structural elements are not shown on the plans. But if it is impossible to show in other drawings given element as visible, on the plan it is depicted with strokes. In this case, the depicted element can be located both below the cutting plane (niche for radiators) and above it (mezzanine).

The names of the building plan indicate the level of the finished floor of the floor or the floor number, for example: “Plan at elev. 0.000”, “1st Floor Plan”, or, if a number of floors have the same layout, then “2nd and 3rd Floor Plan”. The inscription is not underlined. An example of filling out the plan is shown in fig. 5.

Rice. 5. An example of a drawing plan design.

The tool for constructing elevation marks (levels) on sections/facades (button

located in the window for setting parameters of linear dimensions. When this tool is activated, the window for setting parameters of linear dimensions changes (Fig. 8.13).

Rice. 8.13. Elevation settings mode

In the list of standard levels, in addition to zero level project and two user-defined base levels, you can choose the elevation relative to the user's coordinate system. This option is available if the origin of the standard coordinate system is changed by the user.

Elements designed to control the type of marker (Fig. 8.14) are arranged in two rows.

Rice. 8.14. Elevation Marker View Controls

Using the buttons of the first row, the general view of the marker is selected. The selected option is specified using three switches located in the second row. The first switch determines whether the marker icon should be positioned relative to the elevation line - top or bottom. The second switch specifies the shape of the marker icon. The third switch determines whether the icon is filled.

When you select a marker image in the form of a level mark icon on the floor plan - a circle divided into four sectors, the lower row of controls changes (Fig. 8.15).

Rice. 8.15. Elevation Marker View Options on the Floor Plan

The first switch determines the position of the dimension text relative to the marker icon, the second - the shading option.

The switch that determines the presence of a sign in front of the level value can be set to two positions. When set to the first position, the + (plus) sign is not displayed at a positive elevation, when set to the second, this sign is displayed. With negative elevation, the - (minus) sign is set regardless of the position of this switch.

Activating the tool for constructing elevation marks also changes the appearance of the information palette (Fig. 8.16).

Rice. 8.16. Information palette when activating the elevation tool

On the information palette, the above elements for setting the parameters of elevation marks become available.

Dimensions on the drawings are applied in accordance with GOST 2.307 - 68 *
taking into account the requirements of GOST 21.501 - 93 for construction drawings.

Dimensional numbers printed on the drawing serve as the basis for determining the size of the depicted product (structural element, assembly, building, structure). The drawing should contain a minimum number of dimensions, but sufficient for the manufacture of a product or structural element, as well as for the production of work.

The dimensions in the drawing are indicated by dimension numbers and dimension lines. Dimensions are given in millimeters, without indicating the unit of measure. If the dimensions are indicated in other units of measurement, then the corresponding dimensional numbers are recorded with the designation of the unit of measurement (cm, m, etc.) or indicated in the technical requirements. The dimension number should always indicate the actual size of the part (structure), regardless of the scale of the drawing.

Dimension lines should preferably be applied outside the outline of the image, and should not be separated or crossed by any lines of the drawing.

Dimensional and extension lines are drawn with solid thin lines. To limit the dimension lines at their intersections with contour lines, extension, axial, center and others, apply: serifs - in the form of a short stroke drawn by the main line with an inclination to the right at an angle of 45˚ to the dimension line; in the form of an arrow - for sizes of diameters, radii, angles; in the form of a point - with a lack of space for serifs on dimension lines located in a chain. The distance of the dimension line from the contour line parallel to it, axial, extension and other lines, as well as the distance between parallel dimension lines must be at least 7 mm, and from the dimension line to the circle of the coordination axis - 4 mm. For general view drawings (plans, sections, facades, etc.), dimension lines are located, depending on the size of the images, at a distance of at least 10 mm (14 ... 21 mm is allowed) from the outer contour line. On fig. 3 shows examples of drawing dimension and extension lines in the drawings.

Fig.3. Drawing dimension and extension lines

Conditional level marks (heights, depths) on plans, sections, facades show the distance in height from the surface level of any building structural element located near the planning surface of the earth. This level, as a rule, the level of the “clean” floor of the first floor is taken as zero. On facades and sections, marks are placed on extension lines or contour lines. The leader line, horizontal and vertical, is drawn with a solid thin line. The mark sign is an arrow with a shelf (Fig. 4). The mark mark may be accompanied by explanatory inscriptions, for example: “Lv. h.p.” - the level of the clean floor; "Ur. h.” - ground level.

On construction drawings, level marks are indicated in meters with three decimal places separated from the whole number by a comma. The conditional zero mark is designated - 0.000. A dimensional number showing the level of an element located below the zero mark has a minus sign (for example, - 1.200), and located above - a plus sign (for example, + 2.750).

On the plans, the dimensional number of the mark is applied in a rectangle, the contour of which is circled by a thin solid line, or on the shelf of the leader line, with the obligatory insertion of a plus or minus sign (Fig. 5).

Rice. 4. Drawing height marks on the drawings of facades,
cuts and sections

Rice. 5. Drawing level marks on the building plan:

a - in a rectangle; b - on the shelf-leader

Depending on the accepted method of representation and the nature of the dimensions on construction drawings, some dimensions (for example: slopes, lengths of structural elements, dimensions of rolled profiles, etc.) are applied without dimension and extension lines. The magnitude of the slope (the tangent of the angle of inclination, i.e., the ratio of the excess to the laying) is indicated by a dimensional number in the form of a simple fraction. It is allowed, if necessary, to indicate the value of the slope as a decimal fraction with an accuracy of up to the third decimal place.

Stroke rules for drawings. Inscriptions. Scales. Dimension. Marks for binding elements of buildings and structures in height. Product marking

The rules for the graphic design of drawings are similar to the rules for the execution of engineering drawings, taking into account some features in choosing scales, applying dimensions, sequencing drawings, etc. Stroke of construction drawings is carried out in accordance with GOST 21.501-93. The thickness of the lines when tracing the drawings of plans, sections and facades is taken depending on the accepted scale. So, for example, at a scale of 1:100, the thickness of contour lines when tracing plans and sections of buildings and structures made of stone and reinforced concrete is taken equal to 0.6-0.7 mm, and facades, window and door openings - 0.4-0.5 mm; at a scale of 1:400, the thickness of the contour lines is taken to be 0.4 mm and 0.3 - 0.4 mm, respectively. The thickness of the contour lines when tracing the details of stone, brick and concrete elements at a scale of 1:20 is taken equal to 0.8 mm, and at a scale of 1:1 - 1 mm. On the plans of architectural and construction drawings, floors are highlighted with thicker lines, and the contours of the walls are outlined with lines somewhat thinner. On the drawings building structures reinforcement is also distinguished by thick lines, and the contours of the structure itself are thinner, etc.

Inscriptions on construction drawings are made in font according to GOST 2.304-81. The font size for different inscriptions is applied differently. In the main inscription: the name of the design organization, object, sheet, etc. performed with a height of 5-7 mm, other inscriptions - with a height of 3.5-5 mm; the name of the main drawings and tables is 5-7 mm high, and the secondary drawings and text instructions are 3.5-5 mm high; digital data for filling tables -2.5-3.5 mm. The designation of the coordinating axes, reference and numbering of nodes, position numbers with a circle diameter of up to 9 mm is performed in a font size of 3.5 or 5 mm high, and with a diameter of more than 10 mm - 5 or 7 mm.

The height of dimensional numbers in drawings made on a scale of 1:100 and larger is taken equal to 3.5 mm, and for scales of 1:200 and less - 2.5 mm.

Scales on construction drawings according to GOST 21.101-79 are not marked. However, if necessary, it is allowed to indicate the scale in the main inscription according to the type 1:10, 1:100, etc., and above the image according to the type “А-А (1:50)”. scale of images of plans, facades, sections, structures, etc. should be taken to the minimum, given the complexity of the image, but it is necessary to ensure the clarity of the image, taking into account modern ways duplication of drawings. The scale of images of plans, sections, facades, structures, etc. civil, industrial, agricultural, transport buildings and structures are performed in accordance with GOST 2.302-69, taking into account the requirements of GOST 21.501-93. So, for example, floor plans (except technical ones), sections, facades, plans, floors, coverings, wiring diagrams wireframes are drawn at a scale of 1:400, 1:200, 1:100, and with greater image saturation - 1:50; roofing plans, floors, technical floors - on a scale of 1:1000, 1:800, 1:500, 1:200; fragments of plans, facades, plans and sections of stairs, wiring diagrams internal walls- on a scale of 1:100, 1:50; foundation plans - on a scale of 1:200, 1:100; nodes - on a scale of 1:20, 1:10, 1:5, etc.

Dimensions on construction drawings are applied in accordance with GOST 2.303-68, taking into account the requirements of the system project documentation for construction - GOST 21.105-79. Dimensions in mm on construction drawings are applied in the form of a closed chain without indicating the unit of measurement. If dimensions are given in other units, such as cm, then they are specified in the notes to the drawings. Dimension lines are limited by serifs 2–4 mm long at an angle of 45 ° to the dimension line with an inclination to the right. The thickness of the serif line is taken equal to the thickness of the solid main line adopted in this drawing. Dimension lines should protrude 1 - 3 mm beyond the extreme extension lines. The dimension number is located above the dimension line at a distance of up to 1 mm. The distance from the drawing outline to the first dimension line is assumed to be at least 10 mm. The distance between parallel dimension lines must be at least 7 mm, and from the dimension line to the circle of the coordination axis - 4 mm (Figures 10.5-10.8).

Figure 10.5 - Coordination axes: a - no more than 3; b - more than 3; c - with alphabetic and digital axes; d - with the orientation of the coordination axes

Marks for binding elements of buildings and structures in height are indicated in meters with three decimal places after the occupied one. For a conditional zero mark, the mark of the finished floor of the first floor, denoted by 0.000, is taken. Marks above the conditional zero are indicated without a sign, and below the conditional zero - with a minus sign (-). On facades and sections, marks are placed on extension lines or contour lines. Mark mark is an arrow with a shelf. The arrow is made with main lines 2–4 mm long, drawn at an angle of 45 ° to the extension line or contour line. The mark mark may be accompanied by explanatory inscriptions. For example: Ur. n.p. - the level of the clean floor, Ur. h. – ground level (Figure 10.6).

Figure 10.6 - Applying elevation marks on the drawings of facades, sections, sections: a - symbol marks; b - location of mark mark and shelf; c - application of the mark; g - the same, with explanatory signs

Figure 10.7 - Restriction of dimension lines: a - serif; b - arrow, (s - thickness of the main line); in - dot

Figure 10.8 - Drawing dimension and extension lines

Typical products are marked stamps in accordance with the drawings of typical products, catalogs and standards.

The brand of products on construction drawings is applied next to the products or on the shelves of extension lines. For example, for prefabricated prefabricated buildings, the panel of the inner wall can be designated B24, and the outer wall H14, etc. (Figure 10.9).

Figure 10.9 - An example of marking products (window and door openings) in the drawing

The design and construction of buildings and structures is carried out in strict accordance with building codes and regulations (SNiP), the Unified System for Design Documentation (ESKD), which are collections of state standards (GOST), the System of Design Documentation for Construction (SPDS), instructions on the composition and design of drawings, the use of which is mandatory for all design and construction organizations.

The dimensions on the drawings are applied in accordance with GOST 2.307 - 68 *, taking into account the requirements of GOST 21.501 - 93 for construction drawings.

Dimensional numbers printed on the drawing serve as the basis for determining the size of the depicted product (structural element, assembly, building, structure). The drawing should contain a minimum number of dimensions, but sufficient for the manufacture of a product or structural element, as well as for the production of work.

The dimensions in the drawing are indicated by dimensional numbers and dimension lines. Dimensions are given in millimeters, without indicating the unit of measure. If the dimensions are indicated in other units of measurement, then the corresponding dimensional numbers are recorded with the designation of the unit of measurement (cm, m, etc.) or indicated in the technical requirements. The dimension number should always indicate the actual size of the part (structure), regardless of the scale of the drawing.

Dimension lines should preferably be applied outside the outline of the image, and should not be separated or crossed by any lines of the drawing.

Dimensional and extension lines are drawn with solid thin lines. To limit the dimension lines at their intersections with contour lines, extension, axial, center and others, apply: serifs - in the form of a short stroke drawn by the main line with an inclination to the right at an angle of 45˚ to the dimension line; in the form of an arrow - for sizes of diameters, radii, angles; in the form of a point - with a lack of space for serifs on dimension lines located in a chain. The distance of the dimension line from the contour line parallel to it, axial, extension and other lines, as well as the distance between parallel dimension lines must be at least 7 mm, and from the dimension line to the circle of the coordination axis - 4 mm. For drawings general types(plans, sections, facades, etc.) dimension lines are placed, depending on the size of the images, at a distance of at least 10 mm (14 ... 21 mm is allowed) from the line of the outer contour. On fig. 3 shows examples of drawing dimension and extension lines in the drawings.

Fig.3. Drawing dimension and extension lines

Conditional level marks (heights, depths) on plans, sections, facades show the distance in height from the surface level of any building structural element located near the planning surface of the earth. This level, as a rule, the level of the “clean” floor of the first floor is taken as zero. On facades and sections, marks are placed on extension lines or contour lines. The leader line, horizontal and vertical, is drawn with a solid thin line. The mark sign is an arrow with a shelf (Fig. 4). The mark mark may be accompanied by explanatory inscriptions, for example: “Lv. h.p.” - the level of the clean floor; "Ur. h.” - ground level.

On construction drawings, level marks are indicated in meters with three decimal places separated from the whole number by a comma. The conditional zero mark is designated - 0.000. A dimensional number showing the level of an element located below the zero mark has a minus sign (for example, - 1.200), and located above - a plus sign (for example, + 2.750).

On the plans, the dimensional number of marks is applied in a rectangle, the outline of which is outlined with a thin solid line, or on the shelf of the leader line, with the obligatory insertion of a plus or minus sign (Fig. 5).

Rice. 4. Drawing elevation marks on the drawings of facades, sections and sections

Rice. 5. Drawing level marks on the building plan:

a - in a rectangle; b - on the shelf-leader

Depending on the accepted method of representation and the nature of the dimensions on construction drawings, some dimensions (for example: slopes, lengths of structural elements, dimensions of rolled profiles, etc.) are applied without dimension and extension lines. The magnitude of the slope (the tangent of the angle of inclination, i.e., the ratio of the excess to the laying) is indicated by a dimensional number in the form of a simple fraction. It is allowed, if necessary, to indicate the value of the slope as a decimal fraction with an accuracy of up to the third decimal place.

Methods for designating slopes, see Fig. 6

Fig.6. Ways to designate a slope.

AT modern architecture and construction, plans are understood as images obtained as a result of dissecting a building by a conditional horizontal plane passing at a selected level.

Building plans are necessary so that everyone who studies them has an idea of ​​what shape the structure has, how its rooms are located relative to each other. According to current rules drawing up these documents, they indicate door and window openings, the location of the main walls and partitions, plumbing equipment, built-in wardrobes, etc.

When compiling floor plans public and residential buildings in some cases, it indicates how furniture and other equipment is located in the premises. With regard to plans for industrial buildings, they often indicate the location of such an existing technological equipment, which directly affects constructive solution the building itself. To draw all the contours of the equipment, the selected scale is used, and this procedure is performed using thin lines. The explication indicates the name of the equipment, and this is done in such a way that the position numbers strictly correspond to those indicated directly on the plan.

Drawing dimensions on the plan of a residential building

According to standard requirements drawing up building plans, they must be affixed dimensions, giving an idea of ​​what size all the premises have, as well as the dimensions of the structural elements of structures. On construction drawings, all dimensions must be applied in strict accordance with GOST 2.307 - 68, as well as taking into account the provisions and requirements contained in GOST R 21.1501 - 92. Solid thin lines are used to draw extension and dimension lines.

The way all its structural elements are located on the building plan is determined by their location relative to the coordination axes.

When drawing up plans for buildings, it is recommended that dimension lines be applied in such a way that they are located outside the contours of the image itself.

In order to limit the dimension lines in those places where they intersect with the extension, center, center lines and contour lines, the so-called "serifs" are used. They are short strokes that are drawn by the main line at an angle of 45 ° with an inclination to the right relative to the dimension line of the arrow. Such an image of them is used when specifying the sizes of angles, radii and diameters, as well as distances from a common base. In cases where there is not enough space on the dimension lines, which are located in a chain, to put serifs, they can be replaced with dots.

Drawing dimensions on the plan of a production building

On the drawings and plans of buildings, all dimensions are indicated in millimeters, and after their numerical values, the abbreviation "mm" is not affixed. In cases where other units of measurement (for example, meters or centimeters) are established for the designation of dimensions, their designations (respectively, “m” or “cm”) are indicated, or the relevant information is given in the technical requirements.

External dimension lines on building plans (most often - on the left and bottom) are drawn in an amount of from one to four pieces, and the minimum distance between them should be 7 millimeters. The distance of the first of them to the contour of the plan must be at least 10 millimeters, and it is intended for drawing the dimensions of the door and window openings, as well as the piers located between them. The second dimension line is used to indicate dimensions between adjacent axes, and the third one is used between extreme axes. Elements such as the walls closest to the coordination axes are linked by their dimensions from faces to axes.

As for the internal dimensions of the premises, the thickness of the internal walls and partitions, their values ​​\u200b\u200bare put down on the internal dimension lines, which are drawn at a distance of 8 to 10 millimeters from the partition or wall. The areas of individual premises are indicated in square meters with two decimal places.