The bending in the bottom chord to which I was referring relates specifically the Lynnsfield truss. The connection between the top chord and the bottom chord does not occur over the supporting post at the eave, which means the bottom chord is carrying that as a point load in span. The bottom chord is then held up at the eave post and at the king post; and since the bottom chord is continuous, there is reveresed bending stress at the king post location. It is because of this that the kingpost is in tension in this instance. It is indeed trying to hold up the bottom chord.
