How do you ensure safety on a rod type turnbuckle?

In order to ensure full load carrying capacity (safety) of a specific size turnbuckle, one must provide full thread engagement at both ends of the turnbuckle. In other words you should see part of the left hand rod and the right hand rod protruding into the open section of the turnbuckle.

Forged And Fabricated Turnbuckle Pic
Forged and Fabricated Turnbuckle