The Queenpost Truss system followed the kingpost in design chronology. It was also used to span long distances, frequently up to 75 feet. The queenpost truss is really an explansion of the kingpost design because of an additional rectangular panel in the center which was placed between the two triangles that originally faced the center vertical kingpost timber. The upper horizontal member of that rectangle, however, had to be placed below the horizontal upper chord of the exterior side framework. Frequently, additional diagonal timbers were placed between the corners of the central rectangle.