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MINIMUM REINFORCING IN CMU SHEAR WALLS

MINIMUM REINFORCING IN CMU SHEAR WALLS

MINIMUM REINFORCING IN CMU SHEAR WALLS

(OP)
I reading the ACI530-13.6.4 about minimum reinforcing in masonry shear walls, and it requires BOTH vertical and horizontal reinforcing to be the smaller of the length or height of the wall divided by 3 or 48", whichever is smaller(for Seismic Design Category D).  In the past I've only designed for the verticals to be length/3, or horizontals to be height /3 max spacing.  

The local authority is requiring both, which I think is overly conservative.  Any one else have a similar experience??

Ben Oien, P.E.

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