Roof Truss: Components and Definitions:
Roof Trusses
There are various terms, as given below, having special meaning when used in context of roof trusses. Those terms are explained here.
Span
It is the horizontal distance between supports of the truss. When supported on wall bearings, a distance centre to centre of bearings is the span. In case of trusses framed into supporting steel columns, the clear distance between the column faces is the actual span (Figure ).
Rise
The vertical distance among the apex and the line joining the support is the rise of the truss.
Figure: Steel Roof Truss