Technical Drawing - Exam Papers - Higher - 2000 - Building
A roof system in the form of a shell structure which incorporates a roof light is shown in the pictorial sketch in Fig. 4. Also shown is the outline elevation and end elevation of the roof. The shell structure is generated by translating a straight line, such as BP, which remains in contact with line GH and the parabola ABC and which is always parallel to the plane director BPS. The curve DEF of the roof light is a parabola.
(a) Draw the given elevation and end elevation and project a plan.
(b) Draw a development of the surface R of the roof-light.
Scale 1 : 200