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Two-Way Slab Shear Check

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TKIL10

TKIL10

Structural
Joined
May 18, 2005
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When checking a two-way slab for shear i have been unable to positively determine in ACI what bw should be. It looks to me like it would be the width of my column strips. Has anyone been able to verify this? Thanks for the help.
 
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If you are talking about beam shear (one-way shear) the width for shear strength should correspond to your design width. If you designed your slab based on the column strip width for instance then that is your width. If you designed your slab on a unit width basis then your width is one unit, say per foot. Slabs more commonly fail in two-way shear than one-way because the width for one-way shear is so large.
 
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And two way shear in ACI doesn't use bw - it uses bo - see ACI 318 Section 11.12.
 
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