2.0 SHEAR
2.1 Concrete Breakout Failure Mode
Variables c a1
( continued )
Variables ACI 318-19 Chapter 17 Provision Comments for PROFIS Engineering
c a1
17.7.2.4.1 Modification factor for edge effects for single anchors or anchor groups loaded in shear ,
ψ ed , V
, shall be determined by ( a ) or ( b ) using the lesser value of c a2 .
Reference ACI 318-19 commentary Fig . R17.7.2.1b ( Case 2 ).
( b ) If c a2
< 1.5c a1 , then ψ ed , V
= 0.7 + 0.3 c a2 ( 17 . 7 . 2 . 4 . 1b )
1.5c a1
17.7.2.6.1 Modification factor for anchors located in a concrete member where h a
< 1.5c a1 , ψ h , V
, shall be calculated by Eq . ( 17.7.2.6.1 )
ψ h , V
=
1.5c a1 ≥ 1.0 ( 17.7.2.6.1 )
h a
Reference ACI 318-19 commentary Fig . R17.7.2.1b ( Case 3 ).
178 NORTH AMERICAN PROFIS ENGINEERING ANCHORING TO CONCRETE DESIGN GUIDE — ACI 318-19 Provisions