1. Aberdeen Grammar School Isometric Views

2. Isometric Drawings Lengths and breadths are drawn at 30° to the horizontal. Heights are drawn vertically. All sizes are drawn to their exact sizes. Circles cannot be drawn using compasses.

3. Isometric Drawings - Crates A crate is something that will help you draw isometric drawings. They can be used for small parts of the drawing to simplify the bigger drawing.

4. Isometric Drawings - Crates 30° Begin constructing your crate by drawing the 2 lines at 30° to the horizontal and the vertical line of the front corner.

5. Isometric Drawings - Crates Next mark on the height of the crate and the lengths of the sides. These lengths are all full size as described on your drawing.

6. Isometric Drawings - Crates

7. Isometric Drawings - Circles You cannot draw circles in an isometric drawing using compasses. You must convert a circle into sectors and transfer points of the circle onto an isometric grid.

8. Isometric Drawings - Circles The face of the cylindrical bar is circular as drawn below.

9. Isometric Drawings - Circles To draw this face is an isometric drawing we have to split it up into sectors. To do this we use a 30/60 set square and draw a clockface on the circle.

10. Isometric Drawings - Circles To draw this face is an isometric drawing we have to split it up into sectors. To do this we use a 30/60 set square and draw a clockface on the circle.

11. Isometric Drawings - Circles To draw this face is an isometric drawing we have to split it up into sectors. To do this we use a 30/60 set square and draw a clockface on the circle. 9 8 6 5 4 3 2 1 12 10 11 7

12. Isometric Drawings - Circles Now project lines across from the marks on the circle to the centre line. Use your parallel slide on your drawing board to do this. 9 8 6 5 4 3 2 1 12 10 11 7

13. Isometric Drawings - Circles Now create a grid on your isometric crate to help you draw the isometric circle. The crate should be drawn to the diameter of the face being the length and breadth of one face and the depth being the other dimension.    Length

14. Isometric Drawings - Circles First, draw the centre lines on the face of the crate.

15. Isometric Drawings - Circles Then, draw the construction lines from the circle. You can use a compass to find the distance between each of the lines. 9 8 6 5 4 3 2 1 12 10 11 7

16. Isometric Drawings - Circles Now, use a compass to mark along the lines the distance to where the circle would cross them. 9 8 6 5 4 3 2 1 12 10 11 7

17. Isometric Drawings - Circles Finish marking all the points using this technique. 9 8 6 5 4 3 2 1 12 10 11 7

18. Isometric Drawings - Circles Now complete the isometric circle by joining up the points. This curve should be drawn freehand and should be smooth. 9 8 6 5 4 3 2 1 12 10 11 7

19. Isometric Drawings - Circles To complete the cylinder extend the length back and project the length from the front face to the back face and complete the curve.