Shear stress in a standard steel shape

Constructing the shear diagram

Considering the segment
from x = 1 m to x = 1.5 m

     area under load
                diagram =   0.00 kN
         concentrated
                   forces =   0.00 kN
     total shear force
                  change =   0.00 kN

              at x = 1 m,    V =    -10.00 kN
        total shear force
                     change   =       0.00 kN
             at x = 1.5 m,   V =    -10.00 kN