How can I set an EPhysicalSurface variable default value in code to a custom Physical Surface defined in the editor?

Let’s say I’ve added sand, dirt & metal to my list of Physics Surfaces. How would I go about setting the default value for a variable in code to that project specific sand surface I defined in the editor?

EPhysicalSurface surfaceType = ?????;

Thanks!

EPhysicalSurface surfaceType = UPhysicalMaterial::DetermineSurfaceType(Hit.PhysMaterial.Get());

Appreciate the heads up here! However, this gets surface info from a Hit variable. My question was about how to set a default value to a surface defined in Project Settings.