Concrete Headed-Anchor Pullout (ACI 318-19 17.6.3)
The other tension failure mode concrete-anchor-breakout named as its companion: the head crushing through the concrete. Np = 8 x Abrg x f'c; Npn = psi_cP x Np (1.4 uncracked, 1.0 cracked); phiNpn = 0.70 x Npn. A 3/4-in headed bolt (0.654-in^2 head) in 4,000-psi cracked concrete pulls out at a factored 14.6 kip - and unlike breakout it does not depend on embedment, so deepening the anchor does not raise it. Headed anchors only (not adhesive or expansion). A design check, not a stamped anchor design.
Formula and source
Np = 8 x head_bearing_area_in2 x fc_psi; Npn = psi_cP x Np (psi_cP = 1.4 uncracked at service, 1.0 cracked); phiNpn = 0.70 x Npn.
The ACI 318-19 Section 17.6.3 headed-anchor pullout in tension, by name.
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