Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit III (b): Projections of Solids
Solids are classified according to the surface of covering and number of faces as detailed below.
Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit III (b): Projections of Solids
A solid is defined as an object having three dimensions, viz. length, breadth and height (or) thickness, measured along the three mutually perpendicular axes.
Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit III (b): Projections of Solids
In orthographic projections so far the projections of points, lines and plane surfaces (two dimensional figures) were presented.
Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit II (d): Projections of Planes
1. A Triangular plane is in the form of an isosceles triangle having base with 30 mm side and altitude of 40 mm. It is kept in the first Quadrant such that the surface is perpendicular to both HP and VP. Draw its projections when the base is parallel to VP.
Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit II (d): Projections of Planes
A plane figure which is inclined to both HP & VP may be grouped into two categories as below:
Projections of Planes | Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit II (d): Projections of Planes
Projections for plane figures, perpendicular to one plane and inclined to other plane drawn in previous examples can be drawn only for simple position of plane figures like square, rectangle etc.,
Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit II (d): Projections of Planes
A plane surface may occupy any one of the positions described below in first quadrant angle with respect to HP & VP.
Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit II (d): Projections of Planes
If a plane figure which is kept in dihedral angle is projected, it will intersect the reference planes (HP and VP) at two different lines, unless the plane is parallel to either of the reference planes.
Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit II (d): Projections of Planes
In Chapter 11, it was shown that the projection of a point (ie, Front view and Top view) is also a point.
Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit II (d): Projections of Planes
A regular plane figure can further be classified into two types (i) Simple plane figure and (ii) Composite plane figure.
Subject and UNIT: Engineering Graphics: Unit II (d): Projections of Planes
A plane figure is basically divided into two categories, (i) regular plane figure and (ii) irregular plane figure.
Engineering Graphics (EG)
Subject and UNIT: Engineering Graphics: Unit II (d): Projections of Planes
Plane figures (or) plane surfaces are two dimensional entities enclosed by straight lines or curves or both.