Position of the outermost perimeter of shear reinforcement: the value of k
Eurocode 2 part 1-1: Design of concrete structures 6.4.5 (4)
The control perimeter at which shear reinforcement is not required, uout (or uout,ef see Figure 6.22) should be calculated from Expression (6.54):
|uout = βVEd / (vRd,c d)||(6.54)|
The outermost perimeter of shear reinforcement should be placed at a distance not greater than k⋅d within uout (or uout,ef see Figure 6.22).
The recommended value of k for the calculation of the position of shear reinforcement is 1,5.