Technical Drawing - Exam Papers - Higher - 1994 - Building

Question 6

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Fig. 5 shows the outline plan and elevation of a roof which contains eight hyperbolic paraboloid surfaces.

(a) Draw the given hyperbolic paraboloid surfaces R and S in plan and elevation.

(b) Determine the curvature of the roof surface S along a line joining B to E.

(c) Determine the plane director for the edges AB and CD of the surface A. Show the traces of the plane director having its horizontal trace passing through A.

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