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RE: shear friction from horizontal top reinforcement, to resist holdown anchor pop out in A footing?

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There are several approaches that are essentially the
same thing.

1)Reinforce the grade beam as a beam with stirrups and
horizontal reinf and put a thick plate at the end of
the anchor rod.   Analyse the grade beam as being
loaded by the anchor bolt.

2)  Read the section in ACI 318 on the strut and tie
methodology.  Define a system of struts and ties and
design it in accordance with ACI 318.

3)  Where the concrete section is shallow use
StudRails and design it the same way you would a slab
column connection for punching shear.

There are several provisions in ACI 318 dealing with
shear reinforcement in beams and walls that make me
want to believe that the horizontal reinforcement
improves the situation but the approaches above are
easier to justify.

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