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Technical Drawing - Exam Papers - Ordinary - 2001 - BuildingQuestion 4Fig. 4 shows the outline plan of a hyperbolic paraboloid roof surface ABCD. The roof perimeter is a square in plan. The corners B and D are at ground level, corner A is 7 m above ground level, and corner C is 11 m above ground level. (a) Draw the given plan of the roof and project an elevation. (b) Determine the curvature of the roof along a line joining B and D. (c) Draw a new elevation of the roof which will show the true length of the edge AB. Scale 1 : 100 ![]() ![]() |
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