Roof Truss Framing Members

The truss is commonly pre fabricated from wood and is what holds up the roof.

Roof truss framing members.

The roof truss will have a horizontal lower chord and 2 angled upper chords that follow the roof line. Roof truss span tables alpine engineered products 15 top chord 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 bottom chord 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2 12 24 24 33 27 27 37 31 31 43 33 33 46 2 5 12 29 29 39 33 33 45 37 38 52 39 40 55 3 12 34 34 46 37 39 53 40 44 60 43 46 64 3 5 12 39 39 53 41 44 61 44 50 65 47 52 70. As we will see below there are several different types of designs and this will impact the angles and designs of the overall truss. Inclined or horizontal member that establishes the bottom of a truss usually carrying combined tension and bending stresses.

Part of a truss that extends beyond its support exclusive of. While this article focuses on configurations we also have a very cool set of illustrations showcasing the different parts anatomy of roof trusses. The truss is a framework consisting of rafters posts and struts which supports your roof. Once the trusses are up these will be fastened with metal sheets before being covered by a plywood sheet.

Just as there are many types of roofs with many roof parts there are many different types of roof trusses this extensive article explains through a series of custom truss diagrams the different truss configurations you can use for various roofs. Post frame roof truss 23 residential end frame 1 residential roof truss 88 style. A roof truss is an engineered framework consisting of structural members forming triangles. Elements that make a roof truss.

The roof and ceiling can be attached to the same member steep hip roofs can be constructed easier by stick framing last minute changes can be made one piece at a time with the framing. Structural support usually a beam or wall that is designed by the building designer to carry the truss reaction loads to the foundation. Timber roof trusses are now specified for the majority of domestic roofs constructed in south africa. Most of the typical configurations of roof trusses that can be found today are named based accordingly to their shape like gable m scissors and w truss.

The framework derives its inherent strength from this triangulation. Common 60 dropped end frame 3. Your design should call for the same size lumber for each member. These chords will be connected by web members which will be oriented to form triangles.