When there is no moment applied to the anchor bolt group, all anchors
in the group are uniformly in tension under tensile load.
No of ver. rebar effective to resist tensile anchors n-Nu = number of ver.
rebar located around all anchor bolts in the group within min( 0.5hef , 8" )
distance.
These rebar are considered to be effective to resist anchor bolt's tensile force.
ACI 318-11 RD.5.2.9
