Large bridges rely on piles —long shafts of concrete, timber, or steel—driven hundreds of feet into the ground to reach stable soil.

Ask yourself, "What is the moral of this story?" or "What happens now that I know what I know?" to find the heart of the message. 2. Engineering: Supporting Massive Loads

For a truly "deep" physical piece, structural engineering focuses on the substructure that anchors a span.

In flexibility and yoga, a "deep" bridge refers to an advanced progression of the standard pose.