Now that you've begun to learn about checking constructability of plans by overlaying different disciplines within the drawings - what pairs of disciplines are absolutely necessary to review together? (hint, there's more than 1 pair). Explain what details they reveal about each other and why it's relevant. Example: The Electrical and Equipment plans - Equipment tells you where the intended equipment is to be installed and electrical says whether there will be adequate power supply available. When these don't match up, there could be equipment without power supply or power supply awaiting equipment for the future.