It uses parallel lines to produce the source of the object in the image. The name and or drawing number of the assembly drawing in which the detail drawing is “called up” or “used on” is stated in the title block. Trihedral Angle. An engineering design is usually defined by many individual detail drawings which combine to form an assembly drawing. Here we discuss the important types of projections, including their advantages and disadvantages. 4. 1. This projection planes serves the same purpose in technical drawing as is served by the movie screen. The general recommendation are that thick lines are twice as … Dihedral Angle. Orthographic Projections is a technical drawing in which different ... Types of views Projections Parallel Converge Orthogonal Oblique ... ORTHOGRAPHIC PROJECTIONS PICTORIAL PRESENTATION IS GIVEN DRAW THREE VIEWS OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD Example-5. 1. ORTHOGRAPHIC PROJECTION Orthographic projection is a method of producing a number of separate two-dimensional inter-related views which are mutually – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 80d1b2-NzA5O Figure 1.2 Technical Drawings A. Projection rays Perspective projection Projection plane. the communication of ideas to others. 2. Various types of projection can be used to understand a 3-D structure. A plane is placed in the following two Methods. A projection is a drawing or representation of an entity on an imaginary plane or planes. Methods of Projection. Then a specific view is drawn through every plane. Dihedral Angle. For drawing Orthographic Projection, different planes are placed in a particular order. 5 Method of presentation of engineering drawing 1.9.25 - 1.9.30 12 Hrs 6 Symbolic representation as per BIS SP: 46-2003 1.10.31 - 1.10.35 6 Hrs 7 Construction of scales and diagonal scale 1.11.36 6 Hrs Total 72 Hrs Instructions to the Instructors It is suggested to get the drawing prepare on A4/A3 sheets preferably on only one side. Detail drawings seldom describe the intent of an engineering design. Lines on an engineering drawing signify more than just the geometry of the object and it is important that the appropriate line type is used. Drawing of Orthographic Projection. Architectural drawings are the technical representation of a building that is made prior to the beginning of the construction process. Engineering graphics are obtained by projection from the 3-D object to the viewing surface (the projection plane) Perspective projection is useful for non technical communications Perspective renderings for marketing, etc. Graphical projection has an important role in machine drawing and design. Perspective Projection Of the four methods, perspective projection is not based on parallel lines. There are various types of engineering drawings and all have one simple purpose, i.e. Types of Technical Drawings Technical drawings are based on the fundamental principles of projections. It can be divided into two types based on the scaling of the object: cavalier projection, which uses a 1:1 scale, and cabinet projection, which uses a 2:1 scale. They are made with lines, projections and are based on a scale.Different types of architectural drawings include: Line Thickness For most engineering drawings you will require two thickness', a thick and thin line. FOR T.V. 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