The architect A person who knows very well such concepts as: what is a plan, what is a facade, or what is a section. However, as a homeowner who hires interior design contractors, you should also know what a section is, as well as see how the sectional drawing shows a clear understanding of the materials used, or the way architects build it.
So what exactly is a section? Symbols and rules for drawing sections? Let's explore with MOIVAONHATOI right in this article!
WHAT ARE THE SECTIONS?
- A section is a representation obtained on a cutting plane, when we imagine using this plane to cut an object. The cutting plane chooses so that it is perpendicular to the length of the object to be cut.
- A section is used to show the shape and structure of a cut element that is difficult or impossible to show on the slides.
WHAT ARE THE SIGNS AND REGULATIONS ON THE CUTTING AREA?
Material notation on the cutting surface
What are the symbols for material on a section? MOIVAONHATOI please list for you:
- Standard TCVN 0007-1993 specifies the symbols of materials on the cross-sections of some materials used in technical drawings.
- Designation of materials on sections
- The general notation of materials on the sand surface regardless of the material is shown in the figure below
- On the sections that want to show the type of material, we use
SYMBOLS AND GENERAL REGULATIONS ON THE SECTION
Section notes are the same as the way notes on a section require cross-sections that define the plane of the cut, the arrow indicating the view and the symbol of the section.
All cases of the section are noted except that the section is a symmetrical shape and its symmetry axis coincides with the cut plane trace or coincides with the extension of the cutting plane without drawing lines, The arrow indicates the direction of projection and the symbol in words. Where the section at the cut off also noted above
In the case of cut or cut sections without symmetrical axes coinciding with the cut plane marks or the extended lines of the cutting plane, it is only necessary to draw the cutting line, the arrow indicating the view direction without writing symbols
The section is placed in the right direction of the arrow and it is allowed to place the section in any position on the drawing. If the section has been rotated, then the signature with the curved arrow is the same as the rotated section.
For some sections of an object that have the same shape, but differ in position and angle of cutting, that section has the same signature.
If the cutting plane passes through the axis of a rotating circular hole or a circular hollow section, the boundary of the hole or depression is fully drawn on the section.
In special cases, it is allowed to use curved sections to cut, then the sections are drawn in the form of spreads and marked with spreading marks.
WHAT ARE THE RULES OF THE SECTION?
The dashed lines of the material symbols are drawn with thin lines, inclined at an appropriate angle, preferably 450 with the main contour or with the axis of symmetry of the section.
The distance of the dotted lines depends on the size of the brick area and the scale of the drawing, but not less than twice the width of the bold line and not less than 0.7mm.
In case the area of brick is too wide, it is allowed to draw only in the boundary area. Material symbols of two adjacent parts must be distinguished by the direction of the bricks, or the distance between the dashed lines and the line must be staggered. It is allowed to black out narrow sections of a width less than 2mm.
Where there are adjacent narrow sections, the space must not be smaller than 0.7 mm between these narrow sections. Do not draw dashes through the dimensional digits.
WHAT IS THE CLASSIFICATION OF THE SECTION?
The section is divided into sections that are part of a section and a section that is not. Non-sectional profiles include
A cut-out section is a section placed outside the corresponding representation
A cut-off section can be placed in the middle of a projection. The contour of a section of the section is drawn with solid solid lines. A sectional surface is used to show elements with complex section boundaries.
The cut-out section is usually located along the extension line of the cut line and placed close to the corresponding figure. But also allows arbitrary placement on drawings.
Is the section placed immediately on the corresponding figure. The contour of the short section is drawn by continuous solid lines. The contour in place where the section of the figure is displayed is still fully displayed.
The convolution profile is for elements with a simple section contour A.
Hopefully, with the information above, you already know what a section is, as well as you know how to read a drawing containing a section. With this knowledge, you can supervise the design and construction process of architects.
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