Post Installed Anchor Design: undercut
Post-installed concrete anchor design capacities per ACI 318-19 Chapter 17: wedge expansion, sleeve expansion, screw (Tapcon-type), adhesive threaded rod, and undercut anchors; tension and shear LRFD design strengths for 3/8 to 1 inch diameters in 3000-6000 psi concrete, cracked and uncracked conditions
| anchor type | anchor id | condition | diameter in (in) | effective embedment hef in (in) | embedment depth in (in) | fc psi (psi) | min edge distance in (in) | min spacing in (in) | phi shear (dimensionless) | phi tension (dimensionless) | shear capacity lb (lb) | shear capacity type | tension capacity lb (lb) | tension capacity type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| undercut | 0.5in#3in#3000psi#cracked | cracked | 0.5 | 2.875 | 3 | 3,000 | 2.5 | 5 | 0.65 | 0.75 | 1,870 | steel | 2,020 | concrete_breakout |
| undercut | 0.5in#3in#4000psi#cracked | cracked | 0.5 | 2.875 | 3 | 4,000 | 2.5 | 5 | 0.65 | 0.75 | 1,870 | steel | 2,334 | concrete_breakout |
| undercut | 0.5in#3in#4000psi#uncracked | uncracked | 0.5 | 2.875 | 3 | 4,000 | 2.5 | 5 | 0.65 | 0.75 | 1,870 | steel | 3,090 | concrete_breakout |
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