or king·post, king-post
Origin of king post
Examples from the Web for king post
Sometimes the roof was held up by a single 'king-post' in place of two queen-posts.
Like a battering ram, this king-post could be driven end-onward against the mighty red-iridescent sphere.The Red One|Jack London
But the old style of king-post, queen-post, or hammer-beam roof was prevalent.Chats on Old Furniture|Arthur Hayden
The cross rail, or transom, is strengthened by braces and a king-post to make it lighter and cheaper.Practical Education, Volume II|Maria Edgeworth
The 'king-post' reached from the centre of the tie-beam to the point of the roof.