2.0 SHEAR
2.2 Pryout Failure Mode
Calculations ψ cp , N
( continued )
Calculations ACI 318-19 Chapter 17 Provision Comments for PROFIS Engineering
ψ cp , N
Example of critical edge distance requirements given in an adhesive anchor approval . Reference ICC-ES ESR-3187 Section 4.1.10.2 .
Concrete breakout calculations in tension : c a , min = MIN {( c a1
+ s x12 ): c a2
}.
Check MAXIMUM { c a , min / c ac
: 1.5h ef
/ c ac }.
4.1.10.2 Threaded Rod , Steel Reinforcing Bars , and Hilti HIS-N and HIS-RN Inserts : The modification factor ψ cp , Na must be determined in accordance with ACI 318-14 17.4.5.5 or ACI 318-11 D . 5.5 as applicable , except as noted below .
For all cases where c Na / c ac
< 1.0 , ψ cp , Na determined from ACI 318-14 Eq . 17.4.5.5b or ACI 318-11 Eq . D-27 , as applicable , need not be taken less than c Na
/ c ac . For all other cases ψ cp , Na shall be taken as
1.0 .
The critical edge distance cac must be calculated according to Eq . 17.4.5.5c for ACI 318-14 or Eq . D-27a for ACI 318-11 , in lieu of ACI 318-14 17.7.6 or ACI 318-11 D . 8.6 as applicable .
c ac
= h ef
0.4 т k , uncr
⁎ 3.1 – 0.7 h 1160 h ef
( Eq . 17.4.5.5c for ACI 318-14 or Eq . D-27a for ACI 318-11 ) where h
Concrete breakout calculations in shear : c a , min = MIN { c a1
: c a2 }.
Check MAXIMUM { c a , min / c ac
: 1.5h ef
/ c ac }. h ef need not be taken as larger than 2.4 ; and т k , uncr is the characteristic bond strength in uncracked concrete , h is the member thickness , and h ef is the embedment depth . т k , unc need not be taken greater than : т k , uncr
= k uncr h ef ƒ ́c Eq . ( 4-1 ) π d
Reference the Variables section of the PROFIS Engineering report for more information on the following parameters :
c a , min
: the smallest fixed edge distance being modeled .
c ac
: value derived from testing per AC193 / ACI 355.2 or AC308 / ACI 355.4 for the anchor being modeled . h ef
: effective embedment depth that has been selected for the anchor being modeled .
Reference the Calculations section of the PROFIS Engineering report for more information on the parameter ψ cp , N
.
233 NORTH AMERICAN PROFIS ENGINEERING ANCHORING TO CONCRETE DESIGN GUIDE — ACI 318-19 Provisions