Minimum embedment length for anchor rods on a concrete pedestal? 1

[p4blo]

Hello people! I'm new at this and I hope I get some help around.

I'm designing the anchor rods on a concrete pedestal for tension and shear usnig the Design Guides for AISC 01. My result is to use 4 anchors of 1-3/4" of diameter and with that configuration I can manage all the minimal distances on my base plate and pedestal. However i've been searching for a minimum embedment length for those anchors and can't find any.

The design gives me 5" of depth of embedment (hef) using the concrete breakout cone.I found on an old AISC (2nd edition) that for A36 steel (i'mm using that) one should make that anchor of at least 12 times the diameter, but that's and old Manual and i would like to know if there's something more new to it.

I couldn't find anything on ACI318 Appendix D, neither ACI349 or AISC-13th edition.

Does anyone know if that minimum of 12d is still on use? Or has it changed? Or maybe there's not even a minimum?

Thanks!

 

[amec2004]

You can get a copy of CivilBay anchor bolt design spreadsheet at

http://www.civilbay.com

It provides anchor bolt design example with the option of using Anchor Reinforcement to replace concrete Tension and Shear breakout strength as per ACI 318-08 Appendix D clause D.5.2.9 and D.6.2.9