StressedandStrained
Structural
Per ACI 318-14 Fig R17.4.2.9 you are allowed to use rebar to resist concrete break out. Say you have a 20" footing and are using U shape anchor bars to resist concrete break out and your Ldh and Ld both equal 10". Would you make your anchor rod embedment 10" so you had 10" for Ldh above and 10" for Ld below? To answer my own question, yes, that makes sense. My next question: Would it be unconservative to extend the anchor rod embedment to the bottom of footing = 20"? My gut tells me a deeper embedment is better but my brain tells me I need to force the breakout plane to have enough Ldh/Ld above and below. Does anyone have any back up to support one direction or the other? (I understand that my example uses unrealistic numbers and does not account for cover or slope of breakout plane as it passes the anchor reinforcing but just wanted to keep it simple)
Thanks
Thanks