Final answer:
The primary requirement for bridging in engineering is diagonal bridging. Diagonal bridging is bolted between the bridge's main girders or trusses diagonally, forming an X-shaped pattern to increase the bridge's stiffness and stability.
Step-by-step explanation:
The primary requirement for bridging in engineering is diagonal bridging.
Diagonal bridging, also known as cross-bracing, is a structural element that helps increase the stiffness and stability of a bridge.
It is bolted between the bridge's main girders or trusses diagonally, forming an X-shaped pattern. This helps distribute loads evenly and prevents excessive movement or deformation of the bridge.