Technical Drawing - Exam Papers - Ordinary - 2000 - Building

Question 4

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Fig. 4 shows the outline plan of two adjoining hyperbolic paraboloid roof surfaces ABEF and BCDE. The roof perimeter is a regular hexagon in plan. The corners B, F and D are at ground level, corners A and C are 8m above ground level, and corner E is 22m above ground level.

(a) Draw the given plan of the roof and project an elevation and an end elevation.

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

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