PART 4 SHEAR LOAD
Stand-off Failure Mode
Equations L b = z + ( n )( d 0
) ( continued )
Equations 318-14 Chapter 17 Provision Comments for PROFIS Engineering
L b
= z + ( n )( d 0
) PROFIS Engineering calculations for stand-off with clamping
t plate
= plate or fixture thickness z = standoff + 0.5 ( t plate )
L b
= z
Torque-controlled expansion anchors must be torqued via a nut / washer assembly at the concrete surface . If clamping via a nut / washer assembly occurs , there will be no local spalling at the concrete surface when the anchor is subjected to bending ; therefore , n equals 0 . When “ stand-off with clamping ” is selected in PROFIS Engineering , ( n )( d 0
) = 0 and L b
= z . For a non-grouted stand-off , expansion anchors must be modeled in PROFIS Engineering for “ stand-off with clamping ”.
Reference the Variables section of the report for more information on the following PROFIS Engineering parameters z , n and d 0
.
323 NORTH AMERICAN PROFIS ENGINEERING ANCHORING TO CONCRETE DESIGN GUIDE — ACI 318-14 Provisions