Technical Drawing - Exam Papers - Higher - 1994 - Building

Question 2

Fig. 2 shows the plan of a pitched roof. The surfaces A, C and D have pitches of 45°, 35° and 55°, respectively. The top surface E is horizontal. The line of intersection between the surfaces B and C has a true inclination of 25° to the horizontal plane and the dihedral angle between the surfaces B and C is 125°.

Draw the given plan, project an elevation and determine the dihedral angle between the surfaces A and D.

Scale 1: 100