'Couplings' in the Bible

David prepared large quantities of iron to make nails for the doors of the gates and for the clamps (trusses), and more bronze than could be weighed;

They in turn gave it to the carpenters and builders to buy quarried stone and timber for couplings (trusses, braces) and to make beams for the houses which the kings of Judah had let go to ruin.