I’m a firm believer that all the rescue disciplines in some way are intertwined. A Raker Shore provides a path for a horizontal load to be transferred vertically into the ground. Its four main components are:
- Wall Plate (vertical component receiving the horizontal load)
- Sole Plate ( horizontal component transferring the captured load into the ground)
- Raker (angled component that transfers the captured load from the wall plate down to the sole plate)
- Thrust Block (essentially a dead end for the captured load forcing it into the ground)
The theory is simple, provide a path to transfer the target load from point A to point B.
Using the Vortex, I designed something I’ll call the “Raker-Tex.” The input load is first seen at the tip of the vortex. That input load travels down the vertical component and begins to create a compression force. This happens roughly near the area that the angled component meets the vertical component. Because their connected together the input force traveling through the vortex finds its way down the angled component and into the ground.
Forces follow paths and it’s our job to provide those paths. Whether you’re building a structural shoring system such as the Raker Shore pictured or engineering a rigging system to lower a victim from a roof top, the laws of physics provide the blueprint we must follow.
Mike Donahue 2015