Technical Drawing - Exam Papers - Ordinary - 2005 - Building

Question 4

  

Fig. 4 shows the outline plan of a hyperbolic paraboloid roof surface ABCD.

The corner D is at ground level, corner B is 5m above ground level and corners A and C are 10m above ground level.

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

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

(c) Draw a new elevation of the roof which will show the true length of the edge AD.

Scale 1 : 100

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