Truck (rigging)


A truck is a wooden ball, disk, or bun-shaped cap at the top of a mast, with holes in it through which flag halyards are passed.[1] Trucks are also used on wooden flagpoles, to prevent them from splitting.

Without a masthead truck, water could easily seep into the circular growth rings of a wooden mast. However, the grain in the truck is perpendicular to that of the mast, allowing the water to run off it.


  1. ^ Harold A. Underhill. Masting and Rigging the Clipper Ship and Ocean Carrier. ISBN 0-85174-173-8.