It is a basic requirement and learned early in drafting instruction. Parallel projection is a type of projection where the line of. According to the american design drafting association adda, everything manufactured today is made with a drawing. The cut line is called a cutting plane, and can be done in several ways. In art, lines may be the path made by a pencil or the. Familiarize with different drawing equipment, technical. Technical drawing examination scheme there will be three papers, papers1, 2 and 3 all of which must be taken. This line will become the centre front line of your drawing. Each type is defined by general description, application guide lines, and specific content requirements. Technical personnel in any indus try including craftsmen.
I guess like any type of technical drawing you need to have an understanding of what device youre trying to illustrate, its functions, and the space creators need to understand while assembling. Correct usage of this alphabet of lines is essential whether you use traditional drafting methods or cad. Technical drawings represent the exact shape, dimensions and composition of an object. This contour drawing gives an indication of general physical features and folds in clothing. To make the drawings easier to understand, people use familiar symbols, perspectives, units of measurement, notation systems, visual styles, and page layout. Hidden lined thick hidden lined thick type lines consist of thick short dashes, closely and evenly spaced.
Technical drawing specifications resource using these lines all lines on any particular drawing should be either in pencil or ink, but not a mixture of both. What are the 15 types of technical drawingprojection. An orthographic projection drawing is an important part of the engineering process. The person who will read drawings have to learn what they mean. A structural drawing is a type of technical drawing which depicts the design and working drawings for building as well as technological structures. Types of lines engineering drawing engineering graphics. Line types and their application there are technical drawings of different lines, whose application for underwriting certain elements is foreseen. In engineering drawing required lines are should be maintain maximum thickness.
In this course youll come to know about the types of lines that are used in engineering drawing, it is a technical drawing basics which all the engineers need to know. See more ideas about electrical symbols, electronic schematics and electrical diagram. The second is a drawing done with instruments, known as a final drawing. Create technical drawings with autocad, our most popular cad software. Axonometric drawing that show all three dimensions of an object in one view. Fundamentals of technical drawing technical drawing. This type of technical drawing can cover many different career paths.
Finished drawing will be emailed to the instructor and will be maintained in your electronic notebook. It is not very hard but important so eg is not hard just take it easy. The drafting process is largely accelerated through the use of cad software. Technical drawing free engineering drawing software. Imagine your friend sent you an orthographic projection drawing of a box so you could build it for him. This standard was prepared to define the accepted drawing types used to establish engineering requirements. All the horizontal lines are drawn 30 from the base line, it is an easy way of drawing 3d pictures. Line types identification purpose in this section you will be able to recognise and interpret different line types, and the need for variation in thickness used on engineering drawings. It is an important part of engineering drawing which all has to study in engineering drawing 1st. Explain why designers use orthographic projection drawing to communicate their ideas with manufacturers. The computer keeps a record of all dimensions in the drawing changes to drawing can be made easily editing processes include the ability to copy, move, rotate, mirror and erase drawing parts drawing storage is on a hard drive, memory stick, cd, dvd or floppy disk rather than in a drawing folio. Position the ruler with the waist line facing the top of your page. Parallel projection is the type of projection in which the lines of sight or projectors are parallel to each other, and also perpendicular to the planes of objects or images.
Each type of line has a very precise symbolic meaning. The first is a drawing done without instruments, known as a sketch. Nov 10, 2019 today you and i will quickly take a look at the topic waec syllabus for technical drawing 20202021 download waec syllabus pdf 2020. Commencing mayjune 2005, technical drawing will be examined for certification at the general proficiency only1. Basic types of lines used in engineering drawings by kelly curran glenn sokolowski. D identifliilre types used on engineering drawings. Types of technical drawing lines technical drawing lines are used for different purposes to provide specific information for designers, manufacturers etc.
Structural drawings are primarily concerned with the loadcarrying members of a structure. Orthographic projection drawing the following statements will help you understand orthographic projection drawings. Test and quizzes are based on the information presented during class discussions. Types of lines basics of engineering graphics engineering. Use the table below to experiment with drawing different types of lines. Line types are also a language type to communicate between technical people.
Today you and i will quickly take a look at the topic waec syllabus for technical drawing 20202021 download waec syllabus pdf 2020. Drafting students or those reading the drawings have to learn what they mean, just as one learns a new language. Sketch final drawing artistic drawings convey an idea, feeling, mood or situation. Waec syllabus for technical drawing 20202021 waecnigeria. An introduction to the styles and importance of technical drawing slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Continuous thick lines are used to indicate visible outlines. Principles of dimensioning introduction a detail drawing is expected to provide not only the complete shape description of the part, but also furnish size description. Jan 21, 2018 the types of lines and its apications which are the basics of the engineering graphics. These lines are drawn by leaning on your pencil a lot harder than when drawing construction lines but not hard enough to crack the pencil point. It shows and describes clearly and accurately the information required to build or manufacture a product.
Contractors, estimators, tradesmen and builders rely totally on technical drawings for the. A line can be a straight or a curve, they must have a specific starting point and an endpoint, and may be with or without interruption through his. This is provided in the form of distance between the surfaces, location of holes etc. A section view is a view used on a drawing to show an area or hidden part of an object by cutting away or removing some of that object. The work may meed to be completed inside and outside the classroom if the majority of exercises arealttempted. The results of this work are implemented in the contents and practices of the subjects of the technical drawing and a new subject was also. Line types and their application lines technical drawing. Basic types of lines used in engineering drawings wisc. Surfaces composed of singlecurved surfaces, of planes, or. Pdf technical drawing presentation and practice researchgate. Perspective drawing a perspective drawing is a 3d picture that makes it look more realistic, they seem to like like they recede the further you put it away. Technical drawing, drafting or drawing, is the act and discipline of composing drawings that visually communicate how something functions or is constructed technical drawing is essential for communicating ideas in industry and engineering. It includes a plan or set of plans for the building or other structures. In drawing lines are with dark it is representing the actual image of drawing.
Technical drawing free engineering drawing software autodesk. Mention types of drawing explain the difference between different types of drawings mention some of the applications of technical drawings 1. Technical drawing, also called drafting, is the drawing of graphical plans that are used to make things, especially massproduced goods and highprecision industrial parts. A developable surface may be unfolded or unrolled to lie flat. The following slides will help show the several methods or types of section views. Line types and conventions for mechanical drawings are covered in ansi standard y14.
The technical drawing course is an integral component of the technicalvocational education programme offered by the council. Mar 08, 2017 a structural drawing is a type of technical drawing which depicts the design and working drawings for building as well as technological structures. It shows the correct shape and the exact dimensions necessary to manufacture the object. Technical drawing specifications timboon p12 school. Surroundings and sides of the matters outlines of the edges, end of the screws, b.
Technical drawing is a form of design communication based on line symbols recognized and understood worldwide. Units of study getting started starting a new drawing the. If you dont see any interesting for you, use our search form on bottom v. If you continue browsing the site, you agree to the use of cookies on this website. These lines are drawn to represent hidden or invisible edges of the objects. If you are looking to learn technical drawings, then this app can help you.
It is an important part of engineering drawing which all has to study in engineering drawing 1st year or engineering drawing 1st year diploma. Lines on drawings should be selected according to their application see table 1 for preferred line types. The fundamentals of design drafting resources are flexible and instructors should feel comfortable supplementing curriculum resources that they have found successful throughout the years. May 02, 2018 in this course youll come to know about the types of lines that are used in engineering drawing, it is a technical drawing basics which all the engineers need to know. This video will help you to understand the difference between different types of lines used in technical drawing. Technical drawing lines are used for different purposes to provide specific information for designers, manufacturers, etc. Produce quality pdf files in seconds and preserve the integrity of your original documents. Work on this standard considered the types of engineering drawings most frequently used by business, industry, and government com. Multiview drawing that each view show an object in two dimensions. Oct 17, 2006 an introduction to the styles and importance of technical drawing slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Technical drawings provide clear and accurate information how an object is to be manufactured.
Papers 1 and 2 will be a composite paper to be taken at one sitting. Measure lines, backside section lines, implied axis lines, to state the code of the planes, at diagonal lines which are used to state plane surface, intersection, leader, hatching. Common examples are the sphere, torus, ellipsoid, and hyperboloid. Surfaces composed of singlecurved surfaces, of planes, or of combinations of these types are developable. We welcome your suggestions, and hope that you will become part of the collaborative effort in educating our future engineers and architects. Putting the line types, line weights and line type scales together, we get the following line type definitions to use in our drawings.
This has become very necessary as several aspirants of the 20202021 waec examination have been trooping into our website for waec guide and asking us several other questions concerning the syllabus for waec technical drawing to help them prepare. Engineering drawing can consist of things from civil engineering to mechanical engineering. Both drawing types are used in technical drawing for communication. Objectives at the end of this section you should be able to. How far should you draw the front view from the border line and from the title block.
I have amalgamated the definitions from the engineering drawing supplement and the construction drawing supplement together. Engineering drawing app technical,civil,mechanical apps. Engineering drawing app technical,civil,mechanical for. Draw down the right side of the ruler from the head position to the toe position.
Break lines type lines are ruled, short, zigzag thin lines drawn to represent the breaks. The fundamentals of design drafting a students guide. The alphabet of lines in technical drawing lines in technical drawings are part of a specialized graphic language that is standardized throughout industry. There should be a clear difference in line thickness between heavy lines and construction lines. In this highly interactive object, learners associate basic line types and terms with engineering drawing geometry. Technical drawing is the act and discipline of composing drawings that visually communicate how something functions or is constructed. What are the types of lines in engineering drawing. An orthographic projection drawing may consist of two or more views. Line types used in technical drawing are used for different purposes to provide specific information to the people looking at the drawing. You can define your own, but the british standards require that you add a key to your drawing to describe your custom line types meaning. Slide set 1 alphabet of lines and precedence of lines.