# Punching shear resistance of a lightweight concrete slab without shear reinforcement: the value of `k`_{2}

_{2}

## Eurocode 2 part 1-1: Design of concrete structures 11.6.4.1 (1)

The punching shear resistance [MPa] of a lightweight concrete slab may be calculated as follows:

v = _{lRd,c}C _{lRd,c}k η(100 _{1}ρ _{l}f)_{lck}^{1/3} + k _{2}σ ≥ (_{cp}η _{1}v + _{l,min}k _{2}σ) _{cp} | (11.6.47) |

## Recommendation

The recommended value of `k _{2}` is 0,08.