Long Span Timber Roof Truss

This is the distance of the bottom chord of the truss from outside overhang of bearing wall to outside of the other bearing wall.

Long span timber roof truss.

A truss for a gable roof on one side of your home for example might need to be 15 feet 4 6 m long and 4 6 feet 1 2 1 8 m tall. The span in short is the length of the bottom of the truss. The same thing is true for the bridge of the truss. Timber roof trusses also known as trussed rafters are one of the most critical considerations in any residential building project.

For example an 8 10 metre span for a timber truss is quite a long one and can lead to problems. This truss used in conjunction with heavy timber attic or collar tie trusses works well in a loft area a great room or for an entryway. Trusses must be designed for any special loading such as concentrated loads from hanging partitions or air conditioning units and snow loads caused by driftingnearparapetorslide offfromhigherroofs. Contact us online or call us at 800 816 0335 to discuss your truss needs of fill out our timber truss development form to get your project started.

The dimensions of your structure will determine the angles formed by the truss s top and bottom beams or chords. There are also different styles of timber roof truss that can be used to achieve the look you want. Queen post timber truss. To achieve maximum indicated spans trusses may require six or more panels.

These steel joints are needed to support the overall truss. Ideally it is better to subdivide this into a main frame of around 5 metres with a 2 5 metre aisle on each side. Some spans have a lower rate per foot than others. The king post timber truss handles long spans and heavy load conditions.

They are usually fabricated from timber or steel and are spaced at suitable centres to carry purlins. The more complex the truss framework is the greater quantity of these joints will be required. Trussed rafters can be designed for very long spans ranging from 15 45 m. They typically have a low pitch to give acceptable rainwater run off and can give reasonable daylight spread from rooflights.

Finally the truss calculator will compute the best dimensional method to connect the pieces of the truss with steel joints and a bridge. We have built impressive trusses covering spans as long as 70 feet using many kinds of wood from douglas fir to cedar to southern yellow pine and have a very successful track record. Modified king post trusses are are especially good for when more visual height is desired in the building plan. Before these are designed and ordered the type of truss required needs to be identified as there are many different options available.

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.