Sign post

In a sign post comprising a supporting tube structure having a longitudinal axis, at least an elongated box structure which comprises a first half-shell and a second half-shell, the half-shells being engaged with the tube structure on opposite sides of the tube structure and having a joint line substantially contained in a plane which contains said axis and is transverse to the length of the box structure, first half-rings associated with the first half-shell and second half-rings associated with the second half-shell, first fixing means fixing the first half-rings to the first half-shell, second fixing means fixing the second half-rings to the second half-shell, and third fixing means fixing the first half-rings to the second half-rings to form substantially a ring unit gripping the tube structure and holding the box structure in position on the tube structure;

• the improvement wherein said first means are releasable from outside the box structure, said first half-rings and second half-rings are engaged with the tube structure on opposite sides of said plane and are shaped and disposed to be withdrawable from the tube structure transversely of said plane, said third fixing means are releasable laterally of said axis and accessible from the side of said plane adjacent to the first half-shell and the tube structure has at least an upwardly facing abutment surface against which surface first and second half-rings bear axially downwardly of the tube structure.