A truss span is the measurement of a truss’ length. A truss is a rigid architectural framework made up of one or more triangles that is used to support weight in structures like roofs, floors, and bridges. In architecture and engineering, a variety of truss forms are used. The truss span is determined by the size of the structure it is designed to support.
The truss span is measured from end to end or from one butt cut to the next butt cut in a standard truss. A small 90-degree cut at the end of the truss is referred to as this. The truss span is determined by the material used to construct the truss, the truss configuration, the maximum amount of weight it is designed to support, also known as its load condition, and the truss load duration.
Trusses are available in a variety of sizes and shapes. A common truss, a triangular shape most often associated with the typical roof line, is the most common type. The amount of triangular or zig-zag supports within the frame, as well as allowances for roof overhangs, are all variations on the basic design. The more triangular or zig-zag supports appear within the framework, the longer the truss span.
The cathedral truss is a different type of truss. It’s similar to a standard truss, but it allows for vaulted, raised, or open ceilings within the structure. Some truss shapes allow for variations in the angle or pitch of the roof or support structure, while others allow for flat areas within the form, such as a floor.
Trusses are used in both engineering and architecture, most commonly in the form of truss bridges. Bridges and architecture share the same basic forms, though the materials used differ. Multiple trusses will be lined up one after the other, supported by pylons from below where they meet, in the case of larger geographical areas that need to be spanned. From the 1870s to the 1930s, truss bridges were a popular construction method. The first truss bridge was built in 1830, according to a design by Stephen H. Long.
The most common applications for trusses are in architecture and bridge construction. Trusses were also used in the early days of aviation. The truss was used to support the double wing structure in smaller biplanes, such as those used in World War I.