Technical Drawing - Exam Papers - Higher - 1999 - Building
Fig. 5 shows the outline plan of four adjoining hyperbolic paraboloid roof surfaces ABCO, CDEO, EFGO and GHAO. The roof perimeter is square in plan. The corners A, C, E and G are at ground level, corners B, D, F and H are 25 m above ground level, and corner O is 62.5 rn above ground level.
(a) Draw the given plan and project an elevation.
(b) Determine the true shape of the section R-R through the roof.
(c) Determine the traces of the plane director for the edges AB and OC of the hyperbolic paraboloid surface ABCO and having its horizontal trace passing through C.
Scale 1: 500