Technical Drawing - Exam Papers - Ordinary - 1995 - Building

Question 4

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Fig. 4 shows the outline plan of two similar adjoining hyperbolic paraboloid roof surfaces ABOD and BCDO. The corners A and C are 4 m above ground level, corners B and C are 7 m above ground level, and corner O is 24 m above ground level.

(a) Draw the plan of the roof and project the elevation.
(b) Show the true shape of the section R - sR and S - S through the roof surface.

Scale 1: 200

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