The 'T' is probably the most common kind of roof intersection (as demonstrated in figure 12). The roof truss arrangement at this feature includes a specially designed girder truss (shown in figure 13), usually
consisting of two to four individual trusses connected together with nails or bolts, which support the incoming trusses. Support of the incoming trusses is
off the bottom chord of the girder through girder truss shoes.
The design of the valley frame infill continues the rafter profiles of the opposing roof slopes to form an intersection, and transfers the tile loading uniformly to the top chords of the underlying trusses.