The queen-post truss was remarkably developed by Palladio, a famous Italian architect of the sixteenth century.
But the old style of king-post, queen-post, or hammer-beam roof was prevalent.
At the bend is a condition which resembles that of a hog-chain or truss-rod around a queen-post.
If queen-post trusses are useless, some hundreds of thousands of hog-rods in freight cars could be dispensed with.
This is just such a force as the truss-rod in a queen-post truss must take.