Post which mainly consists of two shell parts, in particular an inner shell (12) and an outer shell (13) that are mutually connected by means of a thermal bridge (14), whereby at least the inner shell (12) is provided with a metalwork groove (21) on one side wall (20) having a certain depth (D), characterised in that on the post (5, 7), between the metalwork groove (21) and the side of the outer shell (13) that is turned away from the inner shell (12), is provided a leg (26) which, seen from the side of the outer shell (13) that is turned away from the inner shell (12), at least partly conceals said metalwork groove (21).