Abstract: An elongate structural member comprising a structural outer shell and at least one arcuate or diagonal reinforcing member within. The structural member is used in structural, semi-structural or cladding applications to carry floor loading, walkway loading, wheeled loading, pressure loading in buildings, bridges and other loading carrying applications. An elongate structural member has an outer shell formed by first and second flanges joined to first and second external webs to have a cross-section in the form of a parallelogram. The first and second external webs are mutually parallel and inclined at an acute angle to the first and second flanges with the flanges being mutually parallel. At least one reinforcing web extends between the first and second flanges within said outer shell. The reinforcing web or webs are inclined to the flanges at the same acute angle as the first and second external webs but in the opposite direction.

Abstract: An elongate strutural member comprising a structural outer shell and at least one arcuate or diagonal reinforcing member within, for use in structural, semi-structural or cladding applications to carry floor loading, walkway loading, wheeled loading, pressure loading in buildings, bridges and other loading carrying applications.