applied at these intersections, the stress in each member is in the direction of it length. Straight, sound
timber should be used in trusses. Figure 3-17 shows various types of trusses used in construction. (The
Howe and Fink trusses are most commonly used.) Trusses are used for large spans to give wide,
unobstructed floor space for such large buildings as shops and hangars. Sometimes small buildings are
trussed to save material. These small trusses act as rafters and give the roof rigidity.
Figure 3-17. Types of trusses