In this part of the concrete anchor bolt design calculation example we will see the interaction of tensile and shear forces for the structural cast in place foundation anchor bolt of the column. Please refer the Figure-1 and 2 of the Part-1 of this anchor design series.

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**What the ACI 318 Codes says**

If, the factored shear load (**2300 lb** in our case, refer part-1) > 0.2* design strength in shear (**10821.297 lb** in our case, refer part-7)

And, the factored tensile load (**20000 lb** in our case, refer part-1) > 0.2* design strength in tension (**20694.6131 lb** in our case, refer part-4)

Then,

*(factored shear load / design strength in shear) + (factored tensile load /design strength in tension) <=1.2…………………..eq.8*

For our case, the left hand side of the **eq.8** becomes:

(2300/10821.297) + (20000/20694.613) = **1.181**, which is less than **1.2**, so, we can conclude that the anchor bolt design is safe under the interaction of tensile and shear forces.

this is so helpful! thanks so much for the time and effort you put into making this clear and easy to follow. i’m very grateful for your effort…i’ve been a practicing structural engineer for about a decade and haven’t needed to prove the pull-out strength of anchor bolts in concrete in that whole time, but now have to demonstrate to a plan checker that my design meets code.

so i’m a little bit rusty, and a lot appreciative of your posting. cheers!