A stout timber post or strut with attendant wedge used to exert pressure on a large object when glueing.
Used in boatbuilding and often the Thom is braced against the floor of the shop or against the slipway cradle. "Let's set up a Thom and get some pressure to bear when we glue in the scarfed piece", "We should Thom the skeg so she bottoms out in the rebate".
by cj66 July 15, 2021