Are the minimum concrete thickness listed for the Kwik-Bolt TZ2 based on the nominal "design" concrete thickness, or the actual concrete thickness. For example, for a nominal "design" 8" concrete slab, ACI tolerances would allow the actual condition to vary down to 7 3/4" minimum. Any chance this 1/4" difference was considered in the Hilti testing regime?
Scenario is field inspector measures an 8" nominal slab at 7 13/16", and then in theory, a 1" Kwik-bolt TZ2 with 4" min. embedment, which requires a minimum 8" concrete thickness, would in theory no longer be acceptable.
And this type of scenario would probably be pretty common, as many of the minimum concrete thicknesses are in full inches, and in common slab design thicknesses.
Hello,
The minimum concrete thickness requirements for KB-TZ2 are based on actual concrete thickness, not nominal concrete thickness. If the minimum concrete thickness requirement for an anchor is not met, then there may be a risk of spalling or splitting the concrete during installation. For more technical information related to the KB-TZ2, please refer to page 298 of the Anchor Fastening Technical Guide or ESR-4266.
Regards,
Matthew