Concrete Anchor Design: cast_in_J_bolt
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| cast_in_J_bolt | CIJB_375_01 | 58 | 36 | 0.0775 | 12,143 | 6 | 8 | 4 | 8 | 0.375 | 9.5 | J-bolt: no bearing area — hook pullout governs per ACI 17.6.3.2 Np=0.9*fc*eh*da; hook len eh=min(3da)=1.125in gives Np=0.9*4000*1.125*0.375=1519 lb (often controls); Nb=24*sqrt(4000)*4.0^1.5=12143 lb; Pullout_Np omitted — hook length dependent | 0.65 | 0.7 | No | F1554-Gr36 | 2,697 | 4,495 | light anchorage, non-structural equipment |
| cast_in_J_bolt | CIJB_500_01 | 58 | 36 | 0.1419 | 16,971 | 7.5 | 10 | 5 | 10 | 0.5 | 12.7 | J-bolt hook pullout Np=0.9*4000*(3*0.5)*0.5=2700 lb at eh=1.5in; Nb=24*sqrt(4000)*5.0^1.5=16971 lb; breakout likely controls in group with no supplemental | 0.65 | 0.7 | No | F1554-Gr36 | 4,938 | 8,230 | utility poles, light sign bases, non-seismic equipment |
| cast_in_J_bolt | CIJB_500_02 | 75 | 55 | 0.1419 | 28,112 | 10.5 | 14 | 7 | 14 | 0.5 | 12.7 | Nb=24*sqrt(4000)*7.0^1.5=28112 lb; J-bolt hook provides limited pullout resistance | 0.65 | 0.7 | No | F1554-Gr55 | 6,386 | 10,643 | moderate-duty sign bases, light pole footings |
This is a sample. Search the full concrete anchor design dataset and 300+ more by creating a free account and accessing the database.
Get started for FREE