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Re: ACI 318-05 Appendix D

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I will use the criteria detailed in D.7, with a modification of equation D-31 to include the terms corresponding to the shear in a perpendicular direction. In other words, resolve the shear force in the "parallel" (Vu1) and "perpendicular" (Vu2) directions, calculate (phi)(Vn) for the two directions and, check if (Nus/(phi)(Nn) + (Vus1)/(phi)(Vn1) + (Vus2)/(phi)(Vn2)) < 1.2.


Eric Tompos <etompos(--nospam--at)> wrote:
ACI 318-05 Appendix D addresses the design of anchors for shear loads directed either parallel or perpendicular to a free edge.  Does it address the design of an anchor where the resultant shear load is at an angle to a free edge?  More specifically, the parallel breakout strength is 2x the perpendicular strength (ACI 318 RD.6.2.1), what is the strength for resultant loads directed at an angle to the free edge?
Eric Tompos, P.E.
NTA, Inc.

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