Design guide for considering concrete breakout in shear using ACI 318 anchoring-to-concrete provisions October 2025 | Page 14

PROFIS ENGINEERING i
• V ua is distributed proportionally over each row: V ua, row n = V N ua, total rows
• where i = the row number and N rows = number of rows being considered
• V ua, row 1 =( 1 / 4)( V ua) = 0.25V ua
• V ua, row 2 =( 2 / 4)( V ua) = 0.50V ua
• V ua, row 3 =( 3 / 4)( V ua) = 0.75V ua
• V ua, row 4 =( 4 / 4)( V ua) = 1.0V ua
Figure 4.2( b). plan view
Figure 4.2( b). elevation view
Reference
[ 14 ]. Case 1 / Case 2 calculations for nominal shear concrete breakout strength( V cbg, row n) will be predicated on the anchor geometry for concrete breakout in shear corresponding to each row( A vc, row n) and the distance of that row from the y- edge( c a1, row n).
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