Partial Safety Factor for Concrete Failure

This partial factor applies for all concrete failure modes (Concrete Cone Failure, Combined Concrete Cone Failure and Anchor Bolt Pullout Failure, Concrete Pryout Failure, Concrete Edge Failure, Concrete Splitting Failure and Concrete Blow Out Failure).

This partial safety factor is calculated using the below formula which depends on the quality of the installation.

Partial Safety Factor for Concrete (γ_c)

This is typically given a value of 1.5.

Partial Safety Factor for Installation (γ₂)

This safety factor depends on the safety quality of the installation;

High Installation Safety = 1.0
Normal Installation Safety = 1.2
Low but Acceptable Installation Safety = 1.4

For mechanical bolts this factor will be given by the manufacturer assuming that the fastener is installed to a good standard in accordance with the manufacturer’s instructions.

For cast in bolts this can generally be taken as 1.0 so long as they are installed to a good standard in accordance with the manufacturer’s instructions.

Unless otherwise stated in the manufacturer’s info, γ_Mp/γ_Msp can be calculated in the same way as γ_Mc.