Sample Drawings: Extracts from the 2D drawings derived from the 3D model layouts.


Section drawing showing the combined Electrical and Structural modules. Note also the module names along the top and the Operational Clearance Volumes for the vertical switches. We modeled various clearance volumes as follows:

  1. Operational Volume: To define the volume parameters of the operational characteristics for the equipment.
  2. Accessibility Volume: Where we require access for personnel to read meters or maintain components.
  3. Maintenance Volume: These volumes represent the clearance space required to remove and replace component parts of equipment as part of a maintenance function.
  4. Design Volumes: Where we have design characteristics that need to be considered. This is very important particularly for Substation design. We also had a variation of this to visualize the influence of lightning protection.


Modelling clearance volumes are an integral part of the 3D modelling which provides us with additional information critical to the Design Reviews that would be carried out in Navisworks.

Substation keyplan

This is typical keyplan which we would include in all plan and elevation drawings.

Substation typical cross section

The cross section for keyplan above.


Cable, Conduit, Trench and Lighting Arrangement. We even modularised the underground works for trenching and conduits. Interesting to note is that when we created the Cable Trench models we also included the trench excavation boundary as a profile. This meant that as we developed the route we also by default developed the excavation parameters. We referred to these as Smart parts; essentially including additional information that facilitates the requirements for other purposes.

Hydro Cable Trench

Also within the model properties we included the volumes for the excavated earth and ultimately the back-fill. In the next post I will explore more of the properties attached to the Smart Parts that assisted with placement of the Cable Trenches to maximize use of Standard manufactured parts and Connector terminals that included additional data to assist with determining the connector routing.

Contact: Hugh Thomson