Tied Truss Arch Roof

It is an arch roof constructed with a top arch of heavy timber no webbing or bottom chord and a steel tie rod.

Tied truss arch roof. The raised tie roof truss imposes a horizontal load onto the wall plate and wall when loaded. This style of roof truss allows homeowners to increase the amount of light they can bring into their homes. This design adds a curvilinear element into the ceiling space instead of the standard horizontal timber raising the structure somewhat and giving some extra volume below. Unlike the conventional truss which is fully triangulated by virtue of its bottom chord fixing the top chords together the raised tie roof completes its triangulation at the flat ceiling to sloping ceiling intersection.

Raised tie trusses allow for excellent skylight placement as they are raised higher and angled better. The hammerbeam roof was the culmination of the development of the arch braced truss allowing greater spaces to be spanned. Directory and listing of tied arch roofs from around the world including images technical data literature and other project information. The hammerbeam roof of westminster hall in london designed by hugh herland and installed between 1395 and 1399 was the largest timber roofed space in medieval europe spanning a distance of just over 20 metres 66 ft.

More roof size up and look at the tied truss.