T.V.

1. AIM: Fig. 3(a) shows the Pictorial (ISOMETRIC) view of a cut block. Draw its following orthographic views using IIIrd angle method of projections. • Front View • Top View • Left Hand Side View

2. Y Y Y H 4 X L D X Z1 6 Fig 3(a) T.V. D L H L.H.S.V. F.V. 2 Z1 X Plane 4 turned up(above plane 2) Plane 6 turned side way(towards left side of plane 2) Fig 3(b)

3. Note : IIIrd angle means, the block is assumed behind 2, below 4 and inside 6, as in fig. 3(b) where the F.V. is projected on 2, seen in X direction, T.V. is projected on 4, seen in Y direction & L.H.S.V. is projected on 6, seen in Z1 direction

4. Fig. 3(c) shows turning of the planes 4 & 6 with their respective hinges, considering plane 2 as fixed plane. • It may be noted that :- • F.V. (X directional view) is on 2, T.V. (Y directional view) is on 4, while L.H.S.V (Z1 directional view) is on 6 • b) F.V is within L & H, T.V is within L & D, While L.H.S.V is within H & D. • c) The symbol for IIIrd angle method of projections is placed as shown on fig. 3(c)

5. 4 T.V. Y X 6 2 L D H F.V. L.H.S.V Note :- XY line, boundary of planes 2,4,6 & hinges are not drawn, in actual otho. practice Fig. 3(c) Symbol here

6. AIM: Fig. 4(a) shows the Pictorial (ISOMETRIC) view of a cut block. Draw its following orthographic views using IIIrd angle method of projections. • Front View • Top View • Right Hand Side View

7. Y Y 4 X Y X Z2 D L T.V. Fig. 4(a) D L H H F.V. 2 R.H.S.V. 8 X Z2 Fig. 4(b) Planes 2, 4 & 8 are assumed as transparent

8. Note : IIIrd angle means, the block is assumed behind 2, below 4 and inside 8, as in fig. 4(b) where the F.V. is projected on 2, seen in X direction, T.V. is projected on 4, seen in Y direction & R.H.S.V. is projected on 8, seen in Z2 direction.

9. Fig. 4(c) shows turning of the planes 4 & 8 with their respective hinges, considering plane 2 as fixed plane. • It may be noted that :- • F.V. (X directional view) is on 2, T.V. (Y directional view) is on 4, while R.H.S.V (Z2 directional view) is on 8 • b) F.V is within L & H, T.V is within L & D, While R.H.S.V is within H & D. • c) The symbol for IIIrd angle method of projections is placed as shown on fig. 4(c) XY line & boundary of planes 2,4 & 8 are not drawn, in actual otho. practice

10. Note :- XY line, boundary of planes 1,3,7 & hinges are not drawn, in actual otho. practice. 4 D T.V. 8 Y X L H R.H.S.V. F.V. 2 Fig. 4(c) Symbol here