ABSTRACT
In this chapter it will be shown how the principles described in Chapter 3 can be used to determine the internal forces in the members of a truss, due to externally applied loads. The definition of a truss is that it is a frame where the joints are assumed to be frictionless and pin-jointed, and that all external loads are applied to the pin joints. In countries where there is a lot of rain, such structures are used to support the sloping roofs of the building, as shown in Figure 4.1.
