Technical Drawing - Exam Papers - Higher - 1998 - Building

Question 6

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In Fig. 5 is shown a pictorial sketch of a shell structure in the form of a hyperbolic paraboloid. Also shown are the plan and elevation of the structure. The surface is generated by extending a portion of the hyperbolic paraboloid surface ABCD to ground level.

(a) Draw the plan and elevation of the structure.

(b) Determine the true shape of the section S-S through the structure.

(c) Determine the traces of the plane director for the elements BC and AD, having its horizontal trace passing through D.

Scale 1: 200

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