2. FOR T.V. A plane is placed in the following two Methods. 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. 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. A projection is a drawing or representation of an entity on an imaginary plane or planes. There are various types of engineering drawings and all have one simple purpose, i.e. Line Thickness For most engineering drawings you will require two thickness', a thick and thin line. 1. Architectural drawings are the technical representation of a building that is made prior to the beginning of the construction process. Dihedral Angle. 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. the communication of ideas to others. It uses parallel lines to produce the source of the object in the image. Types of Technical Drawings Technical drawings are based on the fundamental principles of projections. Perspective Projection Of the four methods, perspective projection is not based on parallel lines. Various types of projection can be used to understand a 3-D structure. 1. Projection rays Perspective projection Projection plane. They are made with lines, projections and are based on a scale.Different types of architectural drawings include: Then a specific view is drawn through every plane. An engineering design is usually defined by many individual detail drawings which combine to form an assembly drawing. Figure 1.2 Technical Drawings A. 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 Drawing of Orthographic Projection. Trihedral Angle. Dihedral Angle. Detail drawings seldom describe the intent of an engineering design. The general recommendation are that thick lines are twice as … 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. 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. Graphical projection has an important role in machine drawing and design. Here we discuss the important types of projections, including their advantages and disadvantages. 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. For drawing Orthographic Projection, different planes are placed in a particular order. 4. This projection planes serves the same purpose in technical drawing as is served by the movie screen. Methods of Projection.