What type of load is initiated at the edge and progresses along the outside?

The type of load that is initiated at the edge and progresses along the outside is known as a horseshoe load. This type of load typically acts on structures in a manner that affects the edges first, resulting in increased stress along the external perimeter before influencing the internal areas. This can be particularly relevant in scenarios where exterior elements, such as additional weights or impacts, concentrate their effects on the edges of a structural member, causing the load to develop and distribute outward from those initial points.

In contrast, a bridged load refers to a load that is supported by structural elements that span between two points, typically resulting in a more even distribution over the bridge component. A distributed load spreads out evenly across a surface, imparting uniform pressure, and is often represented as a constant load per unit length or area. A concentrated load signifies a load applied at a specific point, generating high localized stress. Each of these other load types does not specifically initiate at the edge and progress along the outside in the manner that a horseshoe load does.