Drawings Projection Angle
First angle projection third angle projection first angle projection is commonly used in all countries other than united states.
Drawings projection angle. Drawing of orthographic projection. For drawing orthographic projection different planes are placed in a particular order. Then a specific view is drawn through every plane. A plane is placed in the following two methods.
In this method two principal planes are kept perpendicular to. Third angle projection is primarily used in the united states and canada where it is the default projection system according to asme standard asme y143 2003 and british standard bs 8888when the 3d object is projected into 2d paper after projected front view the top view is placed on the top and the left view is placed on the left. Fig 4 first angle projection fig 5 three views on a plane fig 6 symbol for first angle projection. Although two or three views are enough to reveal an object the projectors from six directions of the object in the first angle are shown if necessary.
The views are to be shown symmetrically as shown in fig 7 b. First angle and third angle projection. Admin 2 years ago 4 comments. Prev article next article.
First of all we know that the first angle projection system and third angle projection system both are the methods used for orthographic projection drawing. Orthographic projection is a way of drawing an 3d object from different directions. Usually a front side and plan view are drawn so that a person looking at the drawing can see all the important sides. First angle projection is one of the methods used for orthographic projection drawings and is approved internationally except the united states.
In this projection method the object is placed in the first quadrant and is positioned in front of the vertical plane and above the horizontal plane. First angle vs third angle projection learn and grow. Unsubscribe from learn and grow. Iti engineering drawing 37886 views.
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