PART 4 SHEAR LOAD
Stand-off Failure Mode
Calculations L b
( continued )
Calculations 318-14 Chapter 17 Provision Comments for PROFIS Engineering
L b
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 Equations section of the report for more information on L b .
Reference the Variables section of the report for more information on the following PROFIS Engineering parameters z , n and d 0
.
340 NORTH AMERICAN PROFIS ENGINEERING ANCHORING TO CONCRETE DESIGN GUIDE — ACI 318-14 Provisions