Technical Drawing - Exam Papers - Higher - 1996 - Building

Question 2

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Fig. 2 shows the outline plan and elevation of a roof and a dormer window. The surface B has a pitch of 30° and the surface A has a pitch of 40°. The line of intersection between the surfaces B and C has a true length of 19m. The dihedral angle between the surfaces B and C is 145°. The true angle between the horizontal surface E and the sloping dormer surfaces D and F is 120°.

(a) Draw the given plan and elevation.

(b) Determine the dihedral angle between the surfaces A and B.

Scale 1: 200

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