Rows and axes in construction drawings. Rules for the implementation of architectural and construction drawings. Rules for the implementation of architectural and construction drawings What is the name of the part of the building between the longitudinal axes
1. Rules for the design of architectural and construction drawings (according to GOST 21.501-93): implementation of the building plan.
General information.
The main and working drawings are carried out in line drawing, using lines of different thicknesses, due to which the necessary expressiveness of the image is achieved. In this case, the elements that fall into the cut are highlighted with a thicker line, and the visible areas behind the section are thinner. The smallest thickness of lines made in pencil is approximately 0.3 mm, in ink - 0.2 mm, the maximum line thickness is 1.5 mm. The thickness of the line is selected depending on the scale of the drawing and its content - plan, facade, section or detail.
Scales images in the drawings should be selected from the following row: to reduce -1:2; 1:5; 1:10; 1:20; 1:25; 1:50; 1:100; 1:200; 1:400; 1:500; 1:800; 1:1000; 1:2000; 1:5000; 1:10,000; to increase - 2:1; 10:1; 20:1; 50:1; 100:1.
The choice of scale depends on the content of the drawing (plans, facades, sections, details) and the size of the object depicted in the drawing. Plans, facades, sections of small buildings are usually made on a scale of 1:50; blueprints large buildings perform on a smaller scale - 1:100 or 1:200; very large industrial buildings sometimes require a scale of 1:400 - 1:500. Units and details of any buildings are performed on a scale of 1:2 - 1:25.
Coordination axes, dimension and extension lines. Coordination axes determine the position of the structural elements of the building, the dimensions of steps and spans. Axial lines are applied with a dash-dotted thin line with long strokes and are marked with marks that are put down in circles.
On the plans of buildings, the longitudinal axes, as a rule, are taken out to the left of the drawing, the transverse ones - from the bottom. If the location of the axes of the opposite sides of the plan does not match, then their markings are placed on all sides of the plan. In this case, the numbering is done through. The transverse axes are marked with ordinal Arabic numerals from left to right, and the longitudinal ones are marked with capital letters of the Russian alphabet (except for E, Z, Y, O, X, Y, E) upwards.
The diameter of the circles must correspond to the scale of the drawing: 6 mm - for 1:400 or less; 8 mm - for 1:200-1:100; 10 mm - for 1:50; 12 mm - for 1:25; 1:20; 1:10..
The font size for designating the axes should be 1.5-2 times larger than the font size of the dimensional numbers used in the drawing. Marking of axes on sections, facades, nodes and details must comply with the plan. To apply dimensions on the drawing, dimension and extension lines are drawn. Dimension lines (external) are drawn outside the contour of the drawing in an amount of two to four in accordance with the nature of the object and the design stage. On the first line from the drawing indicate the dimensions of the smallest divisions, on the next - larger ones. On the last dimension line, the total size between the extreme axes is indicated with the binding of these axes to the outer faces of the walls. Dimension lines should be applied so that it is not difficult to read the drawing itself. Based on this, the first line is drawn at a distance from the drawing no closer than 15-21 mm. The distance between the dimension lines is taken at 6-8 mm. The segments on the dimension lines corresponding to the dimensions of the outer elements of the walls (windows, partition, etc.) are limited by extension lines, which should be applied starting at a small distance (3-4 mm) from the drawing, to the intersection with the dimension line. The intersections are fixed with serifs having a slope of 45 °. With very closely spaced small sizes in the drawings of parts and assemblies, serifs are allowed to be replaced by dots. Dimension lines should protrude beyond the extreme extension lines by 1-3 mm.
The internal dimension lines indicate the linear dimensions of the premises, the thickness of the partitions and internal walls, the width of the door openings, etc. These lines should be drawn at a sufficient distance from the internal edges of the walls or partitions so as not to obstruct the reading of the drawing. 
Rules drawings plans in accordance with the requirements of ESKD and SPDS (schematic drawing): a - coordination axes; b - dimension lines; in-wire lines; g - area of premises; e - cut lines (dimensions are given in millimeters).
Dimensional and extension lines are drawn with a thin solid line. All dimensions are given in millimeters without a dimension designation. The numbers are applied above the dimension line parallel to it and, if possible, closer to the middle of the segment. The height of the numbers is selected depending on the scale of the drawing and must be at least 2.5 mm when done in ink and 3.5 mm when done in pencil. ^
Level marks and slopes. Elevations determine the position of architectural and structural elements on sections and facades, and on plans - in the presence of differences in floor levels. The level marks are counted from the conditional zero mark, which, as a rule, is taken for buildings as the level of the finished floor or the upper edge of the floor of the first floor. Marks below zero are indicated with a "-" sign, marks above zero - without a sign. The numerical value of the marks is put down in meters with three decimal places without indicating the dimension. 
Rules for applying marks, sizes and other designations on sections in accordance with the requirements of ESKD and SPDS (schematic drawing). To indicate the mark on facades, sections and sections, a symbol is used in the form of an arrow with sides inclined to the horizontal at an angle of 45 °, based on the contour line of the element (for example, the edge of the finished floor or ceiling plane) or on the extension line of the element level (for example, the top or the bottom of a window opening, horizontal ledges, exterior walls). In this case, the marks of the external elements are taken out of the drawing, and the internal ones are placed inside the drawing 
On the plans, marks are applied in a rectangle or on a leader line shelf with a “+” or “-” sign. On architectural plans, marks are usually placed in a rectangle, on structural drawings to indicate the bottom of channels, pits, various openings in the floors - on the leader line. 
The magnitude of the slope on the cuts should be indicated as a simple or decimal fraction (up to the third digit) and denoted by a special sign, the acute angle of which is directed towards the slope. This designation is applied above the contour line or on the shelf of the leader line 
On the plans, the direction of the slope of the planes should be indicated by an arrow indicating the magnitude of the slope above it.
Designation of cuts and sections show an open line (trace of the beginning and end of the cutting plane), which is taken out of the image. With a complex broken cut, traces of the intersection of cutting planes are shown
At a distance of 2-3 mm from the ends of the open line extended beyond the drawing, arrows are drawn that indicate the direction of view. Sections and sections are marked with numbers or letters of the Russian alphabet, which are placed under the arrows in transverse sections and on the side of the outer side of the arrows - in longitudinal ones. See the illustration on the right for the arrows' style and size. ^
Designation of the areas of premises. Areas expressed in square meters with two decimal places without a dimension designation, they are usually put down in the lower right corner of the plan of each room. The numbers are underlined. In the drawings of projects of residential buildings, in addition, the residential and useful (total) area of \u200b\u200beach apartment is marked, which is indicated by a fraction, the numerator of which indicates the living area of the apartment, and the denominator is useful. The fraction is preceded by a number indicating the number of rooms in the apartment. This designation is placed on the plan of a large room or, if the area of \u200b\u200bthe drawing allows, on the plan of the front. ^
Remote inscriptions, explaining the names of individual parts of structures in nodes, are placed on a broken leader line, the inclined section of which with a dot or arrow at the end faces the part, and the horizontal one serves as a shelf - the basis for the inscription. With a small scale of the drawing, the leader line can be completed without an arrow and a dot. Remote inscriptions to multilayer structures are applied in the form of so-called "flags". The sequence of inscriptions relating to individual layers must correspond to the order of the layers in the structure from top to bottom or from left to right. The thickness of the layers is indicated in millimeters without dimension. Marks of structural elements on the layout diagrams are applied on the shelves of leader lines. It is allowed to combine several leader lines with a common shelf or put a mark without a leader next to the image of the elements or within the contour. The font size for designating brands should be larger than the font size numbers on the same drawing 
Marking nodes and fragments - important element design drawings to help them read. The main purpose of marking is to link nodes and fragments taken out on a larger scale with detailed areas on the main drawing.
When placing nodes, the corresponding place on the facade, plan or section is marked with a closed solid line (circle or oval) with an indication on the shelf of the leader line with a number or letter of the serial number of the element to be taken out. If the node is located on another sheet, then under the shelf of the leader line, indicate the number of the sheet on which the node is placed 
Above the image or on the side of the rendered node (regardless of which sheet it is placed on), a double circle is placed with the designation of the serial number of the node. Circle diameter 10-14 mm
Technical construction drawings are accompanied by the names of individual images, textual explanations, tables of specifications, etc. For these purposes, a standard roman font with a letter height of 2.5 is used; 3.5; 7; ten; 14 mm. In this case, the font height is 5; 7; 10 mm is used for the names of the graphic part of the drawing; 2.5 and 3.5 mm high - for text material (notes, stamp filling, etc.), 10 and 14 mm high - mainly for illustrative drawings. Image titles are placed above the drawings. These names and headings of text explanations are underlined line by line with a solid line. Headings of specifications and other tables are placed above them, but not underlined.
^ Floor plan.
In the names of plans in the drawings, it is necessary to follow the accepted terminology; architectural plans should indicate the mark of the finished floor or the floor number, for example, “Plan for elev. 0.000", "Plan of 3-16 floors", it is allowed to indicate the purpose of the premises of the floor in the names of the plans, for example, "Plan of the technical underground", "Plan of the attic"
Floor plan depicted as a section by a horizontal plane passing at the level of window and doorways(slightly higher than the window sill) or 1/3 of the height of the depicted floor. With a multi-tiered arrangement of windows on one floor, the plan is depicted within the window openings of the lower tier. All structural elements that fall into the section (steles, pillars, columns) are outlined with a thickened line
On floor plans apply:
1) coordination axes of the building with a dash-dotted thin line;
2) chains of external and internal dimensions, including the distances between the coordination axes, the thickness of walls, partitions, the dimensions of window and door openings (in this case, internal dimensions are applied inside the drawing, external - outside);
3) marks of the levels of clean floors (only if the floors are located at different levels);
4) cut lines (cut lines are carried out, as a rule, in such a way that the openings of windows, external gates and doors fall into the cut);
5) marking of window and door openings, lintels (it is allowed to mark the openings of gates and doors in circles with a diameter of 5 mm);
5) designations of nodes and fragments of plans;
6) names of premises, their area
The names of the premises are allowed, their areas are given in the explications in form 2. In this case, instead of the names of the premises, their numbers are put down on the plans.
Form 2
Explication of premises
Built-in premises and other sections of the building, on which separate drawings are made, are shown schematically as a solid thin line showing load-bearing structures.
Platforms, mezzanines and other structures located above the cutting plane are depicted schematically by a dash-dotted thin line with two points
^
An example of a floor plan for a residential building:
Floor plan elements.
Lightweight concrete block walls. ^
Symbol in plan: The wall thickness is a multiple of 100mm. The thickness of the inner (bearing) wall is min 200 mm. The thickness of the outer walls is 500, 600 mm + 50, 100 mm of insulation. The dimensions of the standard block are 390x190x190mm. ^
The walls are brick. The wall thickness is a multiple of 130mm (130, 250, 380, 510, 640mm). The thickness of the inner (bearing) wall is 250, 380 mm. The thickness of the outer walls is 510, 640 mm + 50, 100 mm of insulation. The dimensions of an ordinary ceramic brick are 250x120x65 (88) mm. ^
Timber walls. Wall thickness (150) 180, 220 mm. The thickness of the inner (bearing) wall is min 180 mm. The thickness of the outer walls is 180, 220 mm. ^
The walls are timbered. Wall thickness 180, 200, 220 - 320 mm (multiple of 20mm). The thickness of the inner (bearing) wall is min 180 mm. The thickness of the outer walls is 180 - 320 mm. ^
Walls - wooden frame filled with effective insulation. The thickness of the frame stand is 100, 150, 180mm + 40-50mm double-sided plating. The thickness of the inner (bearing) wall is 100 + 40-50 mm. The thickness of the outer walls is 150, 180 + 40-50 mm. Partitions:
from lightweight concrete blocks, thickness 190mm;
brick, thickness 120mm;
three-layer wooden, thickness 75mm;
plasterboard metal frame, thickness 50-70mm.
Window openings:
in brick walls Oh;
in timber, log and frame walls.
Doorways external:
in walls made of lightweight concrete blocks;
brick walls;
and frame walls. Doorways internal:
for all types of walls.
Structural size call the design size l building structure, product, element, element of equipment, determined in accordance with the rules of the MKRS (modular coordination of dimensions in construction). Structural dimensions (Fig. 109) take less coordination dimensions l 0 by a gap size of d or more coordination dimensions (with the addition of the value of the protrusions located in the adjacent coordination space). The size of the gap d is set in accordance with the features structural units, operating conditions of joints, installation and tolerances.
Nominal dimensions l 0 structural elements are the design dimensions of building products and equipment, including standardized clearances d; the normalized gap is the thickness of the seam of the gap between the structural elements established by the norms.
Structural dimensions l- design dimensions of structural elements, building products and equipment.
Rice. 109. Location of building structures, products and elements in the coordination space
Natural dimensions structural elements - these are their actual dimensions, which differ from the structural ones by the amount of tolerances established by the standards.
Features of dimensioning on construction drawings. on construction drawings, dimensions are applied in accordance with GOST 2.307-68, taking into account the requirements of the design documentation system for the construction of GOST 21.501-93.
To determine the dimensions of the depicted product (structural element, assembly, building, structure) and its parts, the dimensional numbers printed on the drawing are used. Dimension and extension lines are drawn as a solid thin line with a thickness of S/3 to S/2 (see Fig. 109).
Dimensions in millimeters on construction drawings, as a rule, are applied in the form of a closed chain without indicating the unit of measurement. If the dimensions are given in other units, this is specified in the notes to the drawings. Dimension lines on construction drawings are limited by serifs - short strokes 2-4 mm long, drawn with an inclination to the right at an angle of 45 ° to the dimension line. The thickness of the serif line is equal to the thickness of the solid main line adopted in this drawing. Dimension lines should protrude beyond the extreme extension lines by 1-3 mm. The dimension number is placed above the dimension line at a distance of approximately 0.5 to 1 mm (Fig. 110a, 110b). The extension line should protrude beyond the dimension line by 1-5 mm. With a lack of space for serifs on dimension lines, which are a closed chain, serifs can be replaced with dots (Fig. 110c).
Rice. 110. Limiting dimension lines
The distance from the drawing outline to the first dimension line is recommended to be at least 10 mm. However, in the practice of design work, this distance is taken equal to 14-21 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 (Fig. 111).
Rice. 111. An example of applying dimensions to an image with a gap
with one dimension line
If there are a number of identical elements in the image located at equal distances from each other (for example, the axes of columns), the dimensions between them are put down only at the beginning and at the end of the row (Fig. 112) and indicate the total size between the extreme elements as the product of the number of repetitions by repeating size.
The dimension line on construction drawings is limited by arrows in accordance with GOST 2.307-68 if it is required to indicate the diameter, radius of the circle or angle, as well as when applying dimensions from a common base located on a common dimension line (Fig. 113b and Fig. 114)
Rice. 112. An example of applying dimensions to an image with a gap
with multiple dimension lines
Rice. 114. Dimension line
6.6. Building plan
Plan- this is an image of a section of a building, dissected by an imaginary horizontal plane passing at a certain level, as shown in Fig. 115.
According to GOST 21.501–93, this plane should be located at 1/3 of the height of the depicted floor. For residential and public buildings, the imaginary cutting plane is located within the door and window openings of the floor.
A building plan drawing shows what is in the cutting plane and what is below it. Thus, the plan of the building is its horizontal section.
The building plan gives an idea of the shape of the building in plan and the relative position of the individual rooms. The building plan shows window and door openings, the location of partitions and main walls, built-in wardrobes, sanitary Technical equipment etc. Plumbing fixtures are drawn on the building plan on the same scale as the building plan.
If the plan, facade and section of the building are placed on one sheet, then the plan is placed under the facade in projection connection with it. However, due to large sizes images, plans are usually placed on separate sheets, while their long side is located along the sheet.
When starting to draw a plan, it should be remembered that the side of the plan corresponding to the main facade of the building should be turned to the bottom edge of the sheet. When determining a place on a sheet for a drawing of a building plan, the dimensions and markings to be applied should be taken into account. coordination axes. Therefore, the plan drawing should be located approximately at a distance of 75 - 80 mm from the sheet frame. In specific cases, these dimensions may vary. After determining the location of the plan on the sheet and its scale, they begin to draw.
1. Draw with a dash-dotted line 0.3 ... 0.4 mm thick the coordination axes of the plan, longitudinal and transverse, as shown in fig. 116. These axes are used to link the building to the building coordinate grid, as well as to determine the position of load-bearing structures, since these axes are carried out only along the main walls and columns.
The Arabic numerals 1, 2, 3, etc. are used to mark the axes on the side of a building with a large number of them. Most often, a greater number of axes run across the building. To mark the axes on the side of the building with a smaller number, they use the letters of the Russian alphabet A, B, C, etc. Letters mark, as a rule, the axis running along the building. When marking axes, it is not recommended to use the letters: Z, Y, O, X, C, H, SH, Y, b, b. Axes are marked from left to right and from bottom to top. Omissions in the serial numbering and alphabet when designating the coordination axes are not allowed. Usually marking circles (their diameter is 6 ... .12 mm) are located on the left and lower side of the building. Removing the marking circle from the last dimension line 4 mm (see fig. 112)
2. Taking into account the binding of the axes along the MKRS and the thickness of the walls, the contours of the longitudinal and transverse outer and inner walls are drawn with thin lines (Fig. 117).
The main walls are tied to the coordination axes, i.e. determine the distances from the inner and outer plane of the wall to the coordination axis of the building, and the axis can not be drawn along the entire length of the wall, but only by the amount necessary to set the dimensions of the binding. Coordination axes do not always have to coincide with the geometric axes of the walls. Their position should be set taking into account the coordination dimensions used by the standard span structures of beams, trusses or floor slabs. In buildings with load-bearing longitudinal and transverse walls, the binding is performed in accordance with the following guidelines.
In outdoor load-bearing walls the coordination axis passes from the inner plane of the walls at a distance equal to half the nominal thickness of the inner load-bearing wall, a multiple of the module or its half. In brick walls, this distance is most often taken equal to 200 mm, or equal to the module, i.e. 100 mm (Fig. 118a). In external self-supporting walls, if the floor panels do not go into it, for the convenience of calculating the number of standard floor elements, the coordination axis is combined with the inner face of the wall, which is called zero binding (Fig. 118b). If the floor elements rest on the outer wall throughout its entire thickness, the coordination axis is aligned with the outer edge of the wall (Fig. 118c). In internal walls geometric axis symmetry coincides with the coordination axis (Fig. 118d). Deviation from this rule is allowed for the walls of staircases and walls with ventilation ducts.
Draw the contours of the partitions with two thin lines (Fig. 117). Partitions are tied to marking axes depending on the layout of the premises in the building.
It is necessary to pay attention to the difference in the connection of external and internal main walls and main walls and partitions. If the material of the connected walls is the same, then the walls are drawn as a single unit. If the material of the walls is different, then they are drawn as different elements.
3. At this stage, flights of stairs are depicted and window and door openings are broken down (Fig. 119).
When drawing flights of stairs, the gap between flights should be selected within 100–200 mm, and the width of the treads should be 300 mm.
The symbol for window and door openings with and without filling is shown in accordance with GOST 21.501–93. When drawing a plan on a scale of 1:50 or 1:100, if there are quarters in the openings, their conditional image is given in the drawing. It should be borne in mind that the dimensions of the openings are indicated in GOST without taking into account quarters, therefore, in the drawings, the dimensions are affixed minus quarters, i.e. subtract 130mm from the size of the opening.
It should be remembered that when drawing a partition that limits the vestibule of the entrance, it must be applied after drawing tape marches. This is due to the fact that the dimensions of the vestibule are limited by the dimensions of the interfloor area. The width of the doorway in this partition is similar to the width of the entrance opening, excluding the quarter (see Fig. 119, 122).
Quarter - this is a protrusion in the upper and side parts of the openings of brick walls, which reduces airflow and facilitates the fastening of boxes (Fig. 120). On fig. 120a shows window openings with and without a quarter, and Figure 120b shows doorways with and without a quarter.
It should be noted that when depicting windows on plans and sections on a scale of M1:100 and M1:50, glazing in window openings with a quarter, the first string of glazing is shown in a quarter, and the second is 1 mm inside the building from the first.
The width of the doors is selected from the range: 700 mm for bathroom and toilet; 800 mm or 900 mm for rooms and kitchens; 900 mm or 1000 mm - entrance doors to the apartment; 1200 mm or 1500 mm (two-leaf) - entrance doors to the entrance. When placing a doorway in the wall for interior doors, one should proceed from the convenience of using the premises, the intended arrangement of furniture, etc., which should be taken into account when determining the direction of door opening.
Some recommendations for the placement of doors: the doors to the living rooms and the kitchen should open inwards; doors leading to the bathroom and toilet open outwards; doors should clutter up the room as little as possible.
On the plans door leafs depicted as a solid thin line and open at an angle of approximately 30º (the angle is not indicated in the drawing). Entrance doors The building only opens to the outside.
4. After the picture of windows and doors show the location plumbing equipment(Fig. 119): in the kitchen - a sink and stove, in the toilet - a toilet, in the bathroom - a bath and a washbasin. Conditional graphic images sanitary equipment is performed in accordance with GOST 2.786-70 * and GOST 21.205-93, the dimensions of the most common sanitary equipment are given in fig. 121.
5. Outline the contours of partitions and main walls with lines of appropriate thickness, put down the dimensions and areas of the premises, as shown in fig. 122. When choosing the thickness of the stroke lines, it should be taken into account that non-load-bearing structures, in particular the contours of partitions, are outlined with lines of a smaller thickness than load-bearing main walls.
Dimensions outside the building plan. The first dimension line (chain) with alternating sizes of walls and openings is drawn at a distance of 15 ... .20 mm from the outer contour of the plan.
On the second dimensional chain indicate the distance between adjacent coordination axes.
On the third dimensional chain indicate the distance between the extreme coordination axes.
The distance between parallel dimension lines (chains) must be at least 7 mm, and from the dimension line to the marking circle of the coordination axis - 4 mm. Circles for designating coordination axes are taken with a diameter of 6 ... .12 mm.
The dimensions of the binding of the outer walls to the coordination axes are put down before the first dimensional chain.
Horizontal traces of imaginary cutting planes of the section are also applied on the plans, on which images of the sections of the building are then built. These traces are thick open strokes 1 mm thick with arrows as shown in Fig. 122. If necessary, the imaginary plane of the cut can be depicted with a thickened dash-dotted line. The direction of the arrows, i.e. direction of view, it is recommended to take from the bottom up or from right to left. However, if necessary, you can choose another direction. Depending on the position of the dimensional chains and the workload of the drawing, they can be placed at the outline of the plan or behind the extreme dimensional chain, as shown in Fig. 122. The secant planes of the cuts are indicated by the letters of the Russian alphabet or numbers.
Dimensions placed inside the building plan. The internal dimensions of the premises (rooms), the thickness of the partitions, internal walls, the dimensions of the doorways are put down on the internal dimension lines (chains). Internal dimension lines are drawn at a distance of at least 8 ... 10 mm from the wall or partition.
Indicate the width and length of the staircase, the coordination dimensions of the width of the platforms, the length of the horizontal projection of the marches.
The figure of the size of the area with an accuracy of 0.01 m2 is put on the plan in a free place, closer to the lower right corner of each room, emphasizing it with a solid main line.
Put down the height of the floor and interfloor platforms, and for the first floor - the entrance platform, in a rectangle with an accuracy of the third significant figure after the decimal point, indicating the "+" or "-" sign.
An inscription is made above the plan drawing. For industrial buildings, this will be an indication of the floor level production premises or sites according to the type “Plan for elev. +2,500". The word "mark" is abbreviated. For civil buildings in the inscription, you can write the name of the floor according to the type "Plan of the 1st floor". The inscriptions are not underlined.
The plan indicates the name of the premises. If the size of the image does not allow making an inscription on the drawing, then the rooms are numbered, their name is given in the explication. Marking numbers are placed in circles with a diameter of 6 - 8 mm.
Drawings of floor plans are accompanied by an explication of the premises; lists of interior decoration, etc. The shapes and sizes of explications and statements are shown in fig. 123.
● contours of load-bearing walls that fall into the section 0.6 - 0.7mm;
● contours of partitions 0.3 - 0.4mm;
● contours of elements that did not fall into the cut, the image of stairs, plumbing equipment 0.3mm;
● thickness of extension, dimension, center lines, marking circles and other auxiliary lines 0.2mm.
6.7. test questions
1. What drawings are called construction?
2. List the types of buildings according to their purpose.
3. What is the brand of the main set of working drawings of architectural solutions.
4. What is called a structural element?
5. List the main structural elements of the building.
6. What is a module? What are the meanings of enlarged modules.
7. How are the coordination axes?
8. Features of drawing dimensions on construction drawings.
8. What is called a floor plan?
9. What scale of construction drawings is used to draw plans for residential buildings?
10. How is the plan marked?
11. What is the sequence of the floor plan?
12. How are the mills attached to the marking axes?
13. What is the conditional image in terms of a window opening with a quarter and without quarters?
14. What is the conditional image in terms of a doorway with a quarter and without quarters?
15. How are the elements of sanitary equipment depicted on the plans?
16. What dimensions are applied on the floor plan?
17. How are the areas of premises indicated on the plans?
18. How and what lines are used when tracing the floor plan.
19. What line thickness is used when building a plan
Lecture 7. SECTION
7.1. Level marks of structural elements.
7.2. General information about sections of buildings.
7.3. Methodology for constructing a vertical section of a building.
7.4. Building overlays.
7.5. Construction of window and door openings.
7.5. Test questions.
7.1. Level marks of structural elements
Marks. 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 is taken as zero.
Marks of height levels, depths of structural elements from the reference level (conditional "zero" mark) are indicated in meters with three decimal places separated from the integer by a comma. On facades, sections and sections, marks are placed on the extension lines of the contour.
The conditional "zero" mark is indicated, indicated without the sign " 0,000 ' or with a sign "±0.000" (it is recommended to designate with the sign "±"); marks above zero - with a "+" sign; below zero - with a "-" sign.
On views (facades), sections and sections, marks are placed on extension lines or contour lines and denoted by a conventional sign. The mark mark is (GOST 21.105 - 79) an arrow with a shelf. In this case, 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 leader line, vertical or horizontal, is outlined with a solid thin line (Fig. 124a, 124b).
If necessary, the height and length of the shelf can be increased. If several level signs are located one above the other near one image, it is recommended to place the vertical lines of the mark on one vertical straight line, and make the length of the horizontal shelf the same (Fig. 124c).
The mark mark may be accompanied by explanatory inscriptions. For example: " Lv.p.p." - the level of the clean floor; " Ur.z." - ground level (Fig. 124d).
On construction drawings, level marks in sections (Fig. 125a), facades (Fig. 125b) and plans (Fig. 125c) are indicated in meters with three decimal places separated from the integer by a comma.
The conditional zero mark is indicated as follows: 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 one located above has a plus sign (for example +2.700).
On the plans, the dimensional number of the mark is applied in a rectangle, the outline of which is circled with a thin solid line, or on the shelf of the leader line. In this case, a plus or minus sign is also placed before the dimension number (Fig. 125c).
7.2. General information about building sections
cut called the image of a building, mentally dissected by a vertical plane, fig. 126. If the plane is perpendicular to the longitudinal axes, then the cut is called cross, and parallel to them longitudinal. Sections in construction drawings serve to identify the volumetric and constructive solution of the building, the relative position of individual structures, rooms, etc.
Sections are architectural and constructive.
architectural cuts serve to identify internal view premises and the location of architectural elements of the interior, which do not show the structures of ceilings, rafters, foundations and other elements, but put down the height of the premises, window and door openings, plinth, etc. The heights of these elements are most often determined by elevations. Architectural sections are made at the initial design stage to work out the facade of the building. For the construction of the building, the architectural section is not used, since it does not show the structural elements of the building, fig. 127.
Structural cuts are carried out at the stage of development of working drawings of the building, which show the structural elements of the building (foundations, rafters, ceilings), and also apply required dimensions and marks, Fig. 128.
In working drawings, the direction of view for cuts is taken, as a rule, according to the plan - from bottom to top and from right to left. Sometimes, if necessary, or for educational purposes, the direction of gaze is taken from left to right.
The position of the cutting plane is chosen so that it passes through the most structurally or architecturally important parts of the building: window and door openings, stairwells, balconies, etc. It should be borne in mind that the cut plane along the stairs is always carried out along the marches closest to the observer. In this case, the march of the stairs that has fallen into the cut is outlined with a line of greater thickness (solid main) than the march contour along which the cutting plane does not pass. The contour of this march is outlined with a solid thin line.
The construction of the main elements of buildings is carried out using modular size coordination in construction (MKRS), according to which the dimensions of the main space-planning elements of the building must be a multiple of the module.
The main module is taken equal to 100 mm.
The main structural elements (bearing walls, columns) of the building are located along the modular coordination axes(longitudinal and transverse). The distance between the coordination axes in low-rise buildings are taken as multiples of the 3M module (300 mm).
To determine the relative position of building elements, grid of coordination axes.
Coordination axes are drawn with dash-dotted thin lines and are usually indicated on the left and bottom sides of the plan, marked, starting from the lower left corner, with Arabic numerals (from left to right) and capital letters of the Russian alphabet (from bottom to top) in circles with a diameter of 6 ... 12 mm (Fig. .2).
Rice. 2. An example of marking the coordination axes
Dimensions on construction drawings they are affixed in millimeters and are applied, as a rule, in the form of a closed chain.
Dimension lines are limited to serifs - short strokes 2 ... 4 mm long, drawn with an inclination to the right at an angle of 45 ° to the dimension line. Dimension lines should protrude beyond the extreme extension lines by 1 ... 3 mm. The dimension number is located above the dimension line at a distance of 1 ... 2 mm (Fig. 3, a).
To designate cutting plane positions section or section of a building, an open line is used in the form of separate thickened strokes with arrows indicating the direction of view. The cut line is marked with Arabic numerals (Fig. 3, c). The start and end strokes must not cross the outline of the image.
The dimensions of buildings in height (height of floors) are assigned as multiples of the modules. Floor height of a building is defined as the distance from the floor level of a given floor to the floor level of an overlying floor. In projects of residential buildings, the floor height is assumed to be 2.8; 3.0; 3.3 m
On facades and sections, high-rise marks the level of an element or structure of a building from any calculated level taken as zero. Most often, the level of the finished floor (floor covering) of the first floor is taken as the zero level (mark ± 0.000).
Level marks are indicated in meters with three decimal places without indicating units of length and are placed on extension lines in the form of an arrow with a shelf. The sides of the right angle of the arrow are drawn by a solid thick main line at an angle of 45 ° to the extension line (Fig. 4).
Rice. 3. Inscription of the dimensions and position of the cuts:
a - dimensions and dimension lines; b – gaze direction arrow;
c - positions of cuts
Rice. 4. Drawing level marks on the views:
a - dimensions of the level mark; b - examples of location and design
level marks on cuts and sections; c – the same, with explanatory inscriptions;
d - an example of the image of the level sign on the plans
The mark mark may be accompanied by explanatory inscriptions: Ur.ch.p. - the level of the clean floor; Ur.z. - ground level.
Marks on the plans are applied in rectangles (Fig. 4, d). Marks above the zero level are indicated with a plus sign (for example, + 2.700), below zero - with a minus sign (for example, - 0.200).
The following are accepted in construction drawings: denominations types of buildings.
AT names of plans the building indicates the mark of the finished floor of the floor, the floor number or the designation of the corresponding plane; when executing a part of the plan - the axes that limit this part, for example:
Elevation plan +3,000;
2nd floor plan;
Plan 3–3;
Elevation plan 0.000 in axes 21–39, A–D.
AT name of cuts of the building, the designation of the corresponding secant plane is indicated (in Arabic numerals), for example, Section 1–1.
AT names of facades of the building, the extreme axes are indicated, between which the facade is located, for example:
Facade 1–5;
Facade 12–1;
Facade A-G.
For multilayer structures, portable inscriptions located on shelves in a straight line,
ending with an arrow (Fig. 5). The sequence of inscriptions (material or construction of layers with indication of their thickness) to individual layers must correspond to the sequence of their location on the drawing from top to bottom and from left to right.
On the leader lines, ending with a shelf, additional explanations to the drawing or item numbers of elements in the specification are placed.
Rice. 5. Examples of execution of portable inscriptions
Graphic symbols materials in sections and sections of buildings and structures are given in App. 3. The distance between parallel hatching lines is selected within 1 ... 10 mm, depending on the hatching area and image scale. Material designations are not used in the drawings if the material is homogeneous, if the dimensions of the image do not allow the symbol to be applied.
Conditional graphic images of building elements and sanitary devices are given in App. four.
Annex 3
GRAPHIC DESIGNATION OF MATERIALS IN SECTIONS,
SECTIONS AND VIEWS
Appendix 4
GRAPHIC IMAGES OF BUILDING ELEMENTS
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Coordination axes are applied to the images of the building, structures with thin dash-dotted lines with long strokes, denoted by Arabic numerals and capital letters of the Russian alphabet (with the exception of the letters: Ё, Z, Y, O, X, C, Ch, W, b, Y, b) in circles with a diameter of 6 - 12 mm.
Omissions in numerical and alphabetic (except for those indicated) designations of the coordination axes are not allowed.
The numbers indicate the coordination axes along the side of the building and structures with a large number of axes. If there are not enough letters of the alphabet to designate the coordination axes, subsequent axes are designated by two letters.
Example - AA; BB; VV.
The sequence of numerical and alphabetic designations of the coordination axes is taken according to the plan from left to right and from bottom to top (Figure 10 a) or as shown in the figures10 b,in.
The designation of the coordination axes, as a rule, is applied on the left and lower sides of the plan of the building and structure.
If the coordination axes of the opposite sides of the plan do not coincide, the designations of the indicated axes at the divergence points are additionally applied along the top and / or right sides.
For individual elements located between the coordination axes of the main supporting structures, additional axes are applied and denoted as a fraction:
Above the line indicate the designation of the previous coordination axis;
Under the line - additional serial number within the area between adjacent coordination axes in accordance with Figure 10 G.
It is allowed to assign numerical and alphabetic designations to the coordinating axes of half-timbered columns in continuation of the designations of the axes of the main columns without an additional number.
Figure 10 - Designations of the coordination axes
On the image of a repeating element attached to several coordination axes, the coordination axes are designated in accordance with Figure 11:
- "a" - with the number of coordination axes not more than 3;
- "b" - " " " " more than 3;
- "in" - for all alphabetic and digital coordination axes.
If necessary, the orientation of the coordination axis to which the element is attached, in relation to the neighboring axis, is indicated in accordance with Figure 11 G.
Figure 11 - Orientation of the coordination axes
To designate the coordination axes of block sections of residential buildings, the index "c" is used.
Example - 1s, 2s, Ac, Bs.
On the plans of residential buildings composed of block sections, the designations of the extreme coordination axes of the block sections are indicated without an index in accordance with Figure 12.
Figure 12 - Designation of the coordination axes
in block sections
Application of dimensions, slopes, marks, inscriptions. Linear dimensions and maximum deviations of linear dimensions in the drawings are indicated in millimeters, without indicating the unit of measurement.
The dimension line at its intersection with extension lines, contour lines or axial lines is limited by serifs in the form of thick main lines 2–4 mm long, drawn at an angle of 45 ° to the right at an angle of 45 ° to the dimension line by 1–3 mm.
When applying a diameter or radius dimension inside a circle, as well as an angular dimension, the dimension line is limited by arrows. Arrows are also used when dimensioning radii and internal fillets.
When applying the size of a straight segment, the dimension line is drawn parallel to this segment, and extension lines are perpendicular to the dimension lines.
It is preferable to apply dimensions outside the outline of the image, avoiding the intersection of extension and dimension lines if possible. If it is necessary to apply a dimension in the shaded area, the corresponding dimension number is applied on the shelf of the leader line.
The minimum distance between parallel dimension lines should be 7 mm, and between the dimension line and the contour line - 10 mm and is selected depending on the size and shape of the image, as well as the saturation of the drawing.
Dimensional numbers are applied above the dimension line as close as possible to its middle.
Level marks (heights, depths) of structural elements, equipment, pipelines, air ducts, etc. from the reference level (conditional "zero" mark) are indicated by a conventional sign in accordance with Figure 13 and are indicated in meters with three decimal places separated from the integer by a comma.
Figure 13 - Designation of the level mark
The “zero” mark, usually taken for the surface of any structural element of a building or structure located near the planning surface of the earth, is indicated without a sign; marks above zero - with a "+" sign; below zero - with a "-" sign.
On views (facades), sections and sections, marks indicate extension lines or contour lines in accordance with Figure 14, on plans - in a rectangle in accordance with Figure 15.
Figure 14 - Indication of level marks on sections
Figure 15 - Indication of marks on the plans
On the plans, the direction of the slope of the planes is indicated by an arrow, above which, if necessary, the slope is put down as a percentage in accordance with Figure 16 or as a ratio of height and length (for example, 1: 7).
It is allowed, if necessary, to indicate the value of the slope in ppm, as a decimal fraction with an accuracy of the third decimal place. In the drawings and diagrams, in front of the dimension number that determines the magnitude of the slope, a “Д sign is applied, the acute angle of which should be directed towards the slope.
The designation of the slope is applied directly above the contour line or on the shelf of the leader line.
Figure 16 - Indication of the direction and magnitude of the slope of the plane
Near the images on the shelves of leader lines, only brief inscriptions are applied that are directly related to the image of the object, for example, indications of the number of structural elements (holes, grooves, etc.), if they are not included in the table, as well as indications of the front side, directions rolled products, fibers, etc.
The leader line that intersects the contour of the image and is not diverted from any line ends with a dot (Figure 17 a).
The leader line drawn from the lines of the visible and invisible contour, as well as from the lines denoting surfaces, ends with an arrow (Figure 17 b,in).
Figure 17 - Drawing leader lines
Remote inscriptions for multilayer structures should be made in accordance with Figure 18.
Figure 18 - Applying an inscription to multilayer structures
Position numbers (brands of elements) are applied on the shelves of leader lines drawn from the images of the component parts of the object, next to the image without a leader line or within the contours of the depicted parts of the object in accordance with Figure 19.
With a small-scale image, leader lines end without an arrow and a dot.
Figure 19 - Drawing the positions of the elements of objects
Leader lines should not intersect each other, be non-parallel to the hatching lines (if the leader line passes through the hatched field) and, if possible, not cross dimension lines and image elements that do not include the inscription placed on the shelf.
It is allowed to make leader lines with one break (Figure 20), as well as to draw two or more leader lines from one shelf (Figure 21).
Captions related directly to the image can contain no more than two lines located above and below the leader line shelf.
The font size for designating the coordination axes and positions (marks) should be one or two numbers larger than the font size adopted for dimensional numbers in the same drawing.
The text part placed on the drawing field is placed above the main inscription.
It is not allowed to place images, tables, etc. between the text part and the main inscription.
On sheets larger than A1, it is allowed to place text in two or more columns. The width of the column should be no more than 185 mm.
Tables are placed in the free space of the drawing field to the right of the image or below it.
The tables placed on the drawing are numbered within the drawing if there are references to them in the technical requirements. At the same time, the word "Table" with a serial number (without the number sign) is placed above the table on the right.
If there is only one table in the drawing, then it is not numbered and the word "Table" is not written.
When drawing on two or more sheets, the text part is placed only on the first sheet, regardless of which sheets contain the images, which include the instructions given in the text part.
The inscriptions relating to the individual elements of the subject and applied to the shelves of the leader lines are placed on those sheets of the drawing on which they are most necessary for ease of reading the drawing.
The inscriptions on the drawings do not underline.
To designate images (views, sections, sections), surfaces, dimensions and other elements of the product in the drawing, capital letters of the Russian alphabet are used, with the exception of the letters Y, O, X, b, Y, b.
Letter designations are assigned in alphabetical order without repetition and, as a rule, without gaps, regardless of the number of drawing sheets. It is preferable to designate images first.
In case of a lack of letters, digital indexing is used, for example: "View A"; "View A 1"; "View A 2"; "B-B"; "B 1 -B 1"; "B 2 -B 2". The letters are underlined.
If the designations are applied by machine, then they are allowed not to be underlined.
The font size of the letter designations should be approximately twice the size of the digits of the dimensional numbers used in the same drawing.
The scale of the image in the drawing, which differs from that indicated in the main inscription, is indicated directly below the inscription related to the image, for example:
If in the drawing it is difficult to find additional images (sections, dimensions, additional views, remote elements) due to the high saturation of the drawing or its execution on two or more sheets, then additional images are marked indicating the numbers of sheets or designations of the zones on which these images are placed (figure 22).
Figure 22 - Specifying sheet numbers in addition to the image
In these cases, above the additional images, their designations indicate the numbers of sheets or designations of zones on which additional images are marked (Figure 23).
Figure 23 - Making inscriptions over additional images
The building, or any structure in the plan, is divided by conditional axial lines into a number of segments. These lines that determine the position of the main load-bearing structures are called longitudinal and transverse coordination axes.
The interval between the coordination axes in the plan of the building is called a step, and in the predominant direction the step can be longitudinal or transverse.
Coordination axes marking
In the event that the distance between the coordinating longitudinal axes coincides with the span, overlap or coating of the main supporting structure, then this interval is called the span.
Floor height in a multi-storey residential building
The floor height H floor is taken as the distance from the floor level of the selected floor to the floor level of the floor above. By the same principle, the height of the upper floor is also determined, at which the thickness of the attic floor is assumed to be conditionally equal to the thickness of the interfloor floor c. In industrial one-story buildings, the floor height is equal to the distance from the floor to the bottom surface of the roof structure.
In order to determine the relative position of the parts of the building, a grid of coordination axes is used that determines the supporting structures of this building.
Coordination axes are stroked with dotted thin lines and marked inside circles with a diameter of 6 to 12 mm.
Floor height in a one-story building
The marking of the coordination axes is made in Arabic numerals and capital letters, with the exception of the symbols: 3, Й, О, X, Ы, b, b.
The height of the font denoting the coordination axes is chosen one or two numbers more than the size of the numbers on the same sheet.
The numbers indicate the axes along the side of the building with the largest number coordination axes.
The direction of the marking of the axes is applied from left to right, horizontally and from bottom to top, vertically.
Axes marking is located, as a rule, on the left and lower sides of the building plan.
The coordination axis of the outer wall is located at a distance, a = 100 mm, observing the indentation for the installation of floor slabs.
Coordination axes of external and internal walls
d) e)
Fig.7.Options for drawing coordination axes
are marked with letters from the center to the periphery and numbers - from the left horizontal axis clockwise (Fig. 7 a,7c). It is customary to designate axes on the lower and on the left sides of the building plan. If the axes of the opposite sides of the building do not match, then they are marked on each side, respectively (Fig. 7g). For any element
Commodities located between the coordination axes of the main load-bearing structures (for example, columns in a building scheme with an incomplete frame) apply additional axes. These axes are indicated by a fraction: the numerator indicates the designation of the previous coordination axis, and the denominator indicates an additional serial number within the area between adjacent coordination axes (Fig. 7d). It is allowed not to assign additional numbers to the axes of half-timbered columns, but to designate them in continuation of the designation of the axes of the main columns.
2.3. Attaching walls to coordinate axes
In the drawings of buildings, the role of the coordinate grid is played by the coordination axes of the main walls. After applying the coordination axes to the plan, perform binding structural elements to them, first of all, external and internal load-bearing walls and supports. Binding is carried out by setting dimensions from the axis to both faces of the wall or column. In this case, the axis of the wall is not drawn along its entire length, but is extended only by the amount necessary to set the size of the anchor. It is customary to draw the axes of the supporting columns with two mutually perpendicular segments of dash-dotted lines.
The coordination axes do not always coincide with the geometric axes of the walls. Their position is set taking into account the dimensions of standard span structures of beams, trusses and floor slabs. In the example in fig. 8 for clarity, the layout of the floor panels and their support on the walls are partially shown. The panels are drawn as rectangles with thin diagonals.
Fig.8.Main wall anchors on the floor plan
The binding of walls to modular coordination axes in buildings with load-bearing longitudinal or transverse walls is carried out based on the following guidelines:
on the inner walls, their geometric axis, as a rule, is
fits with the coordination axis (Fig. 9, a; rice. 8, axis B, axis 3);
it is allowed not to combine the geometric and coordination
axes of stairwell walls, walls with ventilation ducts, etc.;
in the walls of stairwells, the axes are drawn at a distance, a multiple of the module, from the inner (facing towards the stairs) face of the wall (Fig. 9, b; rice. eight, axis 2);
in the outer load-bearing walls, the coordination axis is drawn from
a B C D)
Fig.9.Structural wall anchor options
internal (facing towards the room) face of the wall at a distance equal to half the thickness of the corresponding internal load-bearing wall (Fig. 9, in; rice. eight, axis A, axis B, axis 4);
in external self-supporting walls, the so-called
zero binding - the coordination axis is aligned with the internal
edge of the wall - (Fig. 9, G; rice. eight, axis 1);
if the outer wall is in its different sections bearing
cabbage soup ( wall section along axis A between axes 1 and 3) and self-supporting ( wall section along axis A between axes 3 and 4), then the coordination axis is oriented along the bearing section (Fig. 8);
binding of columns and walls of industrial buildings depends on their
positions in one of the rows (middle, extreme or end); options for such bindings are shown in Fig. ten.
a)
b)
in)
G)
e)
e)
and)
h)
and)
Fig.10.Bindings of columns to coordination axes:
Building floor plans
Working drawings of architectural solutions
Building floor plan- this is an image of a section of a building made by an imaginary horizontal cutting plane passing at the level of window and door openings or at a height of 1/3 of the height of the depicted floor of the building.
The floor plan gives an idea of the configuration and dimensions of the building, reveals the shape and location of individual rooms, window and door openings, main walls, columns, stairs, partitions. The contours of the building elements (walls, piers, pillars, partitions, etc.) that fall into the cut and are located behind the cutting plane are applied to the plan.
If floor plans high-rise building have slight differences from each other, then they completely fulfill the plan of one of the floors, for other floors they perform only parts of the plan necessary to show the difference from the plan depicted in full.
Coordination (layout) axes- these are coordination lines that determine the division of a building or structure into modular steps and floor heights. They determine the position of the main load-bearing structures of the building and pass along its main walls and columns.
These axes, which can be longitudinal or transverse, divide the building into a number of elements.
On the images of each building and structure, coordination axes are indicated, which are assigned an independent notation system. Coordination axes are applied with dash-dotted lines with long strokes in accordance with Figure 5. On the plans, the center axes are taken out of the contour of the walls and are indicated in capital letters of the Russian alphabet and Arabic numerals (numbers), which are recorded in marking circles with a diameter of 6-12 mm. The marking circles of the coordination axes are placed at a distance of 4 mm from the last dimension line.
For marking on the side of a building with a large number axes use numbers, and with a smaller number of axes - letters, with the exception of the letters E, Z, Y, O, X, C, H, SH, b, Y, b. Letters mark, as a rule, the axis running along the building.
The sequence of digital and alphabetic designations of the coordination axes is taken according to the plan from left to right and from bottom to top, placing marking circles on the left and bottom sides of the building (Fig. 12, 20).
The designation of the coordination axes, as a rule, is applied on the left and lower sides of the plan of the building and structure. If the coordination axes of the opposite sides of the plan do not match, the designations of the indicated axes are additionally applied at the locations on the upper and / or right sides. Omissions of letters and numbers when marking axes are not allowed.
For individual elements located between the coordination axes of the main supporting structures, additional axes are applied and denoted as a fraction, in the numerator of which the designation of the previous coordination axis is indicated, and in the denominator - an additional serial number within the area between the coordination axes (Fig. 11a).
GOST 21.101-97
INTERSTATE STANDARD
SYSTEM OF DESIGN DOCUMENTS FOR CONSTRUCTION
MAIN REQUIREMENTS FOR PROJECT AND WORKING DOCUMENTATION
5. GENERAL RULES FOR DOCUMENTATION
Coordination axes
5.4. Coordination axes are indicated on the image of each building or structure and an independent notation system is assigned to them.
Coordination axes are applied to the images of the building, structures with thin dash-dotted lines with long strokes, denoted by Arabic numerals and capital letters of the Russian alphabet (with the exception of the letters: Ё, 3, Ъ, O, X, C, Ch, Щ, b, Y, b) in circles with a diameter of 6-12 mm.
Omissions in numerical and alphabetic (except for those indicated) designations of the coordination axes are not allowed.
5.5.
The numbers indicate the coordination axes along the side of the building and structures with a large number of axes. If there are not enough letters of the alphabet to designate the coordination axes, subsequent axes are designated by two letters.
Example: AA; BB; VV.
5.6. The sequence of numerical and alphabetic designations of the coordination axes is taken according to the plan from left to right and from bottom to top (Fig. 1a) or as shown in Fig. 1b, c.
5.7.
The designation of the coordination axes, as a rule, is applied on the left and lower sides of the plan of the building and structure.
If the coordination axes of the opposite sides of the plan do not coincide, the designations of these axes at the divergence points are additionally applied on the upper and / or right sides.
5.8.
For individual elements located between the coordination axes of the main supporting structures, additional axes are applied and denoted as a fraction:
above the line indicate the designation of the previous coordination axis;
under the line - additional serial number within the area between adjacent coordination axes in accordance with fig. 1g
It is allowed to assign digital and letter designations in continuation of the designations of the axes of the main columns without an additional number.
5.9. On the image of a repeating element attached to several coordination axes, the coordination axes are designated in accordance with Fig. 2:
"a" - with the number of coordination axes not more than 3;
"b" - with more than 3 coordination axes;
"c" - for all alphabetic and digital coordination axes.
If necessary, the orientation of the coordination axis, to which the element is attached, in relation to the neighboring axis, is indicated in accordance with Fig. 2y.
Rice. 2
5.10.
To designate the coordination axes of block sections of residential buildings, the index "c" is used.
Examples: 1s, 2s, Ac, Bs.
On the plans of residential buildings, arranged from block sections, the designations of the extreme coordination axes of the block sections are indicated without an index in accordance with Fig. 3.
Rice. 3