Members requiring design vertical shear reinforcement: the guidance on the superposition of different truss models

In the case of bonded prestressing, located within the tensile chord, the resisting effect of prestressing may be taken into account for carrying the total longitudinal tensile force. In the case of inclined bonded prestressing tendons in combination with other longitudinal reinforcement/tendons the shear strength may be evaluated, by a simplification, superimposing two different truss models with different geometry (Figure 6.102N); a weighted mean value between θ₁ and θ₂ may be used for concrete stress field verification with Expression (6.9).