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Technical Drawing - Interpenetration - Solid PenetrationIn this section we will look at how we draw the penetration of a
plane surface by a solid square based prism. Below you can
see the problem that you should lay out one your page if you
wish to work along or attempt this question first. The
labeling has been left out of the question. You should try and do this yourself before looking at the first step of the solution.
![]() You should be able to see from the
orthograhic projection that we have a solid square based
prism parallel to the HP penetrating a plane surface
which is at an angel to the VP. Below are the
stages in the completion of this question.
![]() You may not have labeled the points of
importance the same but do not worry about this so long
as you have the labeling format correct.
In the plan view it is easy to see where the square based prisms edges 1, 2, 3 and 4 intersect with the plane surface. Project these points into the Elevation as shown above. ![]() We now show the lines which are hidden,
(again you do not have to do this unless you have to). Part of the plane surfaces edge ac is behind the
square based prism and the square based prism goes
behind the plane surface before it reaches the edge bd.
![]() Your completed drawing should look like
this.
![]() Your completed drawing without
construction or hidden lines would look like the above
drawing.
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