In the engineering drawing lines are understood only by draftsmen and manufactures as well as drawing experts. In Technical Drawings, Lines are used for the interpretation of drawings by the technical people involved. Type of Lines. A half-section is a view of an object showing one-half of the view in section, as in figure 19 and 20. Designed by Make sure you understand the use of the cutting plane line to show the section. The diagonal lines on the section drawing are used to indicate the area that has been theoretically cut. True False: The pattern used for hatching a section can be something other than diagonal lines. The British Technical Drawing standards allows for three Line weights on each drawing. The Bureau of Indian Standards has prescribed the types of lines in its code IS-10714-1983 to be used for making a general engineering drawing. The section line defines the extents of the section to extract from the building model. BS EN ISO 128-20:2001 Technical drawings. looking at the drawing. In United States copyright law, fair use is a doctrine that permits limited use of copyrighted material without acquiring permission from the rights holders. Below are the uses of Dashed Thin Lines with Dots: This line is similar to the Dash Thin Lines with Dots EXCEPT that it has double dots within it. Please Register here or Login here to contribute to this topic by commenting in the box below. Fair use is a limitation and exception to the exclusive right granted by copyright law to the author of a creative work. You can define the view cutting line while Section View is active or create sketch geometry to use for the view cutting line. A view of this kind is called a section. CONTRIBUTE TO THIS TOPIC | ASK A QUESTION, Johann Wolfgang Dobereiner was credited with the invention of lighter in 1826 while the actual match was made 3 years later, Volkswagen group of companies own some of the top cars of the world. True False: The Cutting Plane line reveals the type of material that the object is to be made from. EXTENSION LINE A light line that extends from the edge or end of a main object line on a drawing, used in conjunction with dimension lines to help determine the dimension of a particular feature. Figure 20 - Front view and half section. If you are the author of the text above and you not agree to share your knowledge for teaching, research, scholarship (for fair use as indicated in the United States copyrigh low) please send us an e-mail and we will remove your text quickly. They are used for limits of partial views if the limit is not an axis. Also, it may be added here, that Lettering is appropriate and correct… Section lines are bidirectional and you can specify the length and depth of the section line either visually, using the pointing device, or by entering numeric values. The basis of any drawing is a line. 90 degrees B. The Line weights should be in the ratio 4:2:1. Sections help in reducing or eliminating the hidden lines. Notice that the square hole in the object has no section lining, since it was not changed by sectioning. It is then shaped into any form and fired inside an oven (called kiln) at a very high temperature. Section Lines. 8.1 and it is required to draw three sectional views.Assume that you had a bracket and cut it with a hacksaw along the line marked B-B. The information of medicine and health contained in the site are of a general nature and purpose which is purely informative and for this reason may not replace in any case, the council of a doctor or a qualified entity legally to the profession. Please kindly recommend to your school, Please click here to kindly support education. Thin lines used in a section view to indicate where the cutting plane line has cut through material. A section is used to show the detail of a component, or an assembly, on a particular plane which is known as the cutting plane. It shows and describes clearly and accurately the information required to build or manufacture a product. Representing hidden details and edges on an object. The person who will read drawings have to learn what they mean. A section drawing is one that shows a vertical cut transecting, typically along a primary axis, an object or building. (source: http://en.wikipedia.org/wiki/Fair_use). They are lines with pointed edges at one or both ends. Used for representing projection lines, C. Used for representing visible outline and edges, Diagonal lines used to state plane surfaces. Basic conventions for lines. Hidden lines are having depth explanation behind according to the drawing system.. Papers 1 and 2 will be a composite paper to be taken at one sitting. Sure you understand the use of a section an imaginary cutting away of part of engineering.. A creative work with a waterproof, paint-like substances called glazes, an object no. 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