In the presence of struts/tirants, how are the design stresses of the contrast beam between two consecutive pins/tirants determined?

A possible dimensioning moment can be the product of the maximum reaction of the point/tirant by the half-distance in the horizontal plane of two consecutive points/tirants (possibly amplified with a coeff. of e.g. 1.5).
A possible dimensioning cutoff for each of the two calculation directions can be given by the maximum reaction of the possibly amplified point/tirant.