Various types of roof trusses are :- 1. Warren and Pratt trusses : These
trusses are commonly used for flatter roofs for
spans of roughly 12m to 38m. 2. The pitched Pratt trusses : These trusses
are the most common types of medium size
trusses which have maximum economical spans of
about 30m. 3. Fink truss : This type of truss is used for steep roofs. 4. Box string truss : This type of truss is used for curved roofs for spans upto 35m. 5. Steel arch truss : This type of truss is used for spans over 30m.