Technical Drawing - Exam Papers - Higher - 2008 - Building

Question 6

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Fig. 5 shows the outline plan and elevation of a roof. R and S are plane roof surfaces. The hyperbolic paraboloid surface AEFD is an extension of the smaller hyperbolic paraboloid surface ABCD.

(a) Draw the given plan and elevation.

(b) Determine the curvature of the roof along a line from A to C.

(c) A plane director for the elements AB and DC is positioned so that it contains point A. Draw the traces for this plane director and determine the shortest distance from the point D to the plane director.

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