Which Of These Terms Are Parts Of A Roof Truss

Terms for roof truss members.

Which of these terms are parts of a roof truss.

Rafters these are wooden beams that run from the top of the roof to the bottom. The highest point on a truss where the sloping top chords meet. The following diagram shows the terms applying to gable end roofs. Learn about the 30 different types of roof trusses with these series of 30 truss diagrams that clearly shows all the parts and different styles of trusses you can use for different types of roofs.

Scupper an opening in a roof usually faced with metal flashing to drain water from the roof at a given point. Select the labelled areas for a description of the different parts of the roof truss. One of a series of diagonal members of the truss that meet at the apex in order to support the roof deck and its loads. Shear horizontal the force in a member which tends to cause the top half to slide horizontally in the opposite direction from the bottom half usually near the support.

Horizontal beams supported by posts and used to support the mid span of rafters to cover longer spans these are used in large buildings like the traditional large old barns in the us. A timber roof truss is a structural framework of timbers designed to bridge the space above a room and to provide support for a roof trusses usually occur at regular intervals linked by longitudinal timbers such as purlins the space between each truss is known as a bay. The wall plate width see figure 7. North light truss is the oldest and most economical kind of truss.

A slight vertical cut usually less than 75mm at the. The rafters when combined together help to form the truss. North light roof truss. Have a wide set of lattice girders that include support trusses.

Secondary bending the bending stress in a member caused by the deflection of the whole truss. Structural support of trusses usually walls normally with a timber wall plate. Roof truss parts explained. Rafters have a tendency to flatten under gravity thrusting outwards on the walls.

Hip this is an external angle formed by the intersection of two sloping roof planes. Just as there are many types of roofs with many roof parts there are many different types of roof trusses. The following diagram shows the terms used for general roof truss members. A horizontal cut to the bottom of a sloping bottom chord usually the width of the bearing i e.

Different parts of the truss are known by a variety of terms.