# Maximum stressing force during tensioning: the values of `k`_{1} and `k`_{2}

_{1}

_{2}

## Eurocode 2 part 1-1: Design of concrete structures 5.10.2.1 (1)P

The force applied to a tendon, `P _{max}` (i.e. the force at the active end during tensioning) shall not exceed the following value:

P = _{max}A⋅_{p}σ_{p,max} | (5.41) |

where:

`A`_{p}- is the cross-sectional area of the tendon
`σ`_{p,max}- is the maximum stress applied to the tendon, = min {
`k`⋅_{1}`f`;_{pk}`k`⋅_{2}`f`}._{p0,1k}

## Recommendation

In this calculation of maximum stressing force, the recommended values for `k _{1}` is 0,8 and for

`k`is 0,9.

_{2}