Technical Drawing - Exam Papers - Higher - 1993 - Building

Question 2

  

Fig 2 shows the outline plan and elevation of roof surfaces and a dormer window. The surface C has a pitch of 40° and the surfaces A and B have a pitch of 35°. The line of intersection between the surfaces C and D has a true inclination of 30° to the horizontal plane. The dihedral angle between the surface D and the dormer surface E is 135°.

(a) Draw the given plan and elevation.

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

Scale 1: 100

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