3D models in viewports - Introduction to AutoCAD 2011: 2D and 3D Design - page 262

3. Using the Polyline tool, construct the outline of the plan view of the
plate of the support, including the holes in the To p viewport (Fig. 13.5).
Note the views in the other viewports.
4. Call the Extrude tool from the Home/Modeling panel and extrude the
plan outline and the circles to a height of 20 .
5. With Subtract from the Home/Solid Editing panel, subtract the holes
from the plate ( Fig. 13.8 ).

Fig. 13.8 First example - the four viewports after Extrude and Subtract

6. Call the Box tool and in the centre of the plate construct a box of
Width

30 .
7. Call the Cylinder tool and in the centre of the box construct a cylinder
of Radius

60 , Length 60 and Height

30 .
8. Call Subtract and subtract the cylinder from the box.
9. Click in the Right viewport, with the Move tool, move the box and its
hole into the correct position with regard to the plate.
10. With Union , form a union of the plate and box.
11. Click in the Front viewport and construct a triangle of one of the webs
attached between the plate and the box. With Extrude , extrude the
triangle to a height of 10 . With the Mirror tool, mirror the web to the
other side of the box.
12. Click in the Right viewport and with the Move tool, move the two
webs into their correct position between the box and plate. Then, with
Union , form a union between the webs and the 3D model.
13. In the Right viewport, construct the other two webs and in the Front
viewport, move, mirror and union the webs as in steps 11 and 12 .

20 and of Height

Fig. 13.9 shows the resulting four-viewport scene.