# 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, `u _{out}` (or

`u`see Figure 6.22) should be calculated from Expression (6.54):

_{out,ef}u = _{out}βV / (_{Ed}v _{Rd,c}d) | (6.54) |

The outermost perimeter of shear reinforcement should be placed at a distance not greater than `k`⋅`d` within `u _{out}` (or

`u`see Figure 6.22).

_{out,ef}## Recommendation

The recommended value of `k` for the calculation of the position of shear reinforcement is 1,5.