Hammer Beam Roof Truss

For a truss of 32 feet span a 1 1 4 inch square bar will be ample and it may be twisted to give a more pleasing effect.

Hammer beam roof truss.

Hammer beam roof english medieval timber roof system used when a long span was needed. The hammer beam timber truss elegantly distributes the roof load extending weight down through the first floor system by way of heavy posts. This truss is favored in heavy timber construction in situations where wide clear spans are required and where a different structural member would obstruct the view of gable end windows. A true hammer beam truss like the one shown here relies on exterior buttresses reminiscent of the flying buttresses of notre dame cathedral to hold it in place and keep the roof planes from spreading apart.

A truss system is a combination of beams braces and rafters that help support a roof s weight. There is a hierarchy of timber framing at work here with trusses supporting the ridge and purlin beams. Above these components is a rack of common rafters. In a hammerbeam roof a series of short wooden horizontal beams curved support beams and wooden.

Modified hammer beam trusses can use a lower tie beam or steel rods to. The tie rods should extend through the hammer beams to their outer end. A hammer beam truss is a cathedral roof truss with an open center. Not a true truss the construction is similar to corbeled masonry see corbel in that each set of beams steps upward and inward by resting on the ones below by means of curved braces and struts.

These trusses can almost always be self contained not requiring any additional framing to be supported. This truss behaves much more like an actual truss with the ability to have a tension line along the hammer beam up into the web down the other side and or up into the king post.