# Bolt Pull Out Force Calculator, Formula, Bolt Pull Out Force Calculation

## Bolt Pull Out Force Calculator:

Enter the values of The Diameter of The Hole D(inches) , The Length of The Hole L(inches) & The Material Bond Factor MF(PSI) to determine the value of The Bolt Pull Out of Force Fpo(lb-f) .

 Enter The Diameter of The Hole: inches Enter The Length of The Hole: inches Enter The Material Bond Factor: PSI Result – The Bolt Pull Out of Force : lb-f

## Bolt Pull Out Force Formula:

The bolt pull out force Fpo(lb-f) in lb-f is equal to  the diameter D(inches) in inches and the length L(inches) in inches  times 3.141 then multiply by the material bond factor MF(PSI).

The formula of the bolt pull out of force can be written as,

Fpo(lb-f) = D(inches) * PI * L(inches) * MF

Here,

Fpo(lb-f) = the bolt pull out of force in lb-f

D(inches) = the diameter of the hole in inches

L(inches) = the length of the hole in inches

MF(PSI) = the material bond factor in PSI

=  600 for epoxy to concrete bond

=  1600 for epoxy to steel bond

### Calculation for Bolt Pull Out Force :

1)To determine the bolt pull out of force and the diameter of the hole 3inches and the length of the hole 5 inches and the material bond factor 600 PSI (concrete bond)

Fpo = D * PI * L * MF

Fpo = 3 * 3.141 * 5 * 600

Fpo = 28269 lb-f

2)To determine the length of the hole and  the bolt pull out of force 28269 lb-f  and the diameter of the hole 3inches and the material bond factor 600 PSI (concrete bond)

Fpo = D * PI * L * MF

28269 = 3 * 3.141 * L * 600

L = 5inches