EGD scenarios

Engineering Graphics and Design

THE DESIGN PROCESS LO 2

SCENARIO 1 (CAM DESIGN)

During the school holidays we have a problem with the grass on our sports fields going dry because there is no one to attend to it.

Design a mechanism for a simple irrigation system which is operated by a cam that will allow the sprinkler system to open and close a valve at regular intervals during this period.



SCENARIO 2 (HELIX)

Letters need to be moved from the top of a landing to the ground floor of a building. The height between the landing and the ground is 1,2 m.

Design a chute around a steel pillar using a helix to transport the letters from the landing to the ground floor.




SCENARIO 3 (INTERPENETRATION)

The owner of a factory which produces clothing wants to expand his business. The extension gets hot in the summer months and the owner, therefore, wishes to extend the air conditioning from the existing factory to the new extension.

Design a cylindrical transition piece of 100 mm to join into the existing cylindrical duct of 150 mm.






INVESTIGATION LO 4

Investigate the feasibility of replacing the vertical steel ladder of a cell phone mast with a spiral type metal staircase. The cylindrical mast has the following specifications:

Diameter 50 m
Height 15 m
The spiral staircase has to be safe with a safety railing.
The steps must be made from checker plate as to avoid slipping.


SIMULATION

Make a model of the staircase and use the following scales
Model – 1:50
Drawing 1:100