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Civil Structures
Quick questions on Engineering drawing AS1100 orthogonal projection: HSC Engineering Studies Civil Structures
7short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is third-angle orthogonal projection?Show answer
Orthogonal projection shows an object using multiple two-dimensional views taken perpendicular to each principal face. AS1100 specifies third-angle projection as the Australian default.
What is line types under AS1100?Show answer
Each line type carries information:
What is sectional views?Show answer
To show internal features, AS1100 uses a cutting plane line (chain thick with arrows) on one view, with the resulting section shown on the adjacent view. The cut faces are hatched with thin continuous lines at 45 degrees. Different materials use different hatching patterns (concrete is hatched as triangular aggregate, steel as evenly spaced lines).
What is civil structures application?Show answer
A civil engineering drawing of a reinforced concrete beam typically shows:
What is drawing dimensions inside views?Show answer
Dimensions live outside the view boundary, between the feature and the next outer line.
What is forgetting hidden detail?Show answer
Internal features (rebar, voids, bolts behind plates) are shown with hidden (dashed thin) lines or in a sectional view.
What is wrong line weights?Show answer
Visible outlines are thick (about 0.5 mm); hidden lines, dimensions and hatching are thin (about 0.25 mm). Marker readability depends on this contrast. :::
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