Concrete Anchor Design: adhesive_threaded_rod
Concrete anchor design data per ACI 318-19 Chapter 17. Covers cast-in and post-installed anchor types: cast-in headed bolt (F1554 Gr.36/55/105), cast-in J-bolt, cast-in headed stud (AWS/A108), expansion wedge anchor, expansion sleeve anchor, undercut anchor, adhesive threaded rod (AC308), adhesive rebar, and concrete screw anchor. Fields include nominal diameter, effective embedment hef, effective stress area Ase, bearing area Abrg, steel tensile strength Nsa, shear strength Vsa, concrete breakout Nb at f'c=4000 psi (kc=24 cast-in, kc=17 post-installed), pullout Np, critical edge distance cac, critical spacing, minimum member thickness, installation torque, phi factors for tension and shear, and seismic qualification. Sources: ACI 318-19 Ch.17, ACI 355.2/355.4, ASTM F1554, ASME B1.1, ICC-ES AC193/AC308.
| anchor type | record id | Fu ksi (ksi) | Fy ksi (ksi) | anchor area Ase in2 (in2) | concrete breakout Nb lb (lb) | critical edge distance cac in (in) | critical spacing in (in) | effective embedment hef in (in) | min member thickness in (in) | nominal diameter in (in) | nominal diameter mm (mm) | notes | phi shear | phi tension | seismic qualification | steel grade | steel shear strength lb (lb) | steel tensile strength lb (lb) | typical applications |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| adhesive_threaded_rod | ADH_TR_1000_01 | 125 | 105 | 0.6057 | 44,694 | 18 | 24 | 12 | 24 | 1 | 25.4 | A193-B7 futa=125ksi; Nsa=75713 lb steel governs; Nb=17*sqrt(4000)*12.0^1.5=44694 lb; phi=0.65; very deep embed ensures ductile steel failure per ACI 17.10 | 0.6 | 0.65 | Yes | A193-B7 | 45,420 | 75,713 | high-load seismic retrofit, structural upgrade |
| adhesive_threaded_rod | ADH_TR_375_01 | 58 | 36 | 0.0775 | 6,666 | 5.063 | 6.75 | 3.375 | 6.75 | 0.375 | 9.5 | Bond strength governs for short embed: Nba=tau_k*pi*d*hef=~800psi cracked*pi*0.375*3.375=3166 lb (often controls); Nb=kc*sqrt(fc)*hef^1.5=17*sqrt(4000)*3.375^1.5=6666 lb (kc=17 post-installed per ACI 17.7.2.2b); phi=0.65 bond failure | 0.6 | 0.65 | No | Carbon-A36 | 2,697 | 4,495 | non-seismic mechanical, retrofit connections |
| adhesive_threaded_rod | ADH_TR_500_01 | 58 | 36 | 0.1419 | 10,264 | 6.75 | 9 | 4.5 | 9 | 0.5 | 12.7 | Bond Nba=tau_k*pi*d*hef=1300*pi*0.5*4.5=9159 lb cracked; steel 8230 lb governs; Nb=17*sqrt(4000)*4.5^1.5=10264 lb; phi=0.65 bond | 0.6 | 0.65 | No | Carbon-A36 | 4,938 | 8,230 | light retrofit, HVAC, electrical equipment |
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