Axial Tension Capacity
phi_t P_n = min(0.9·Fy·Ag, 0.75·Fu·Ae)
phi_t P_n = min(NaN, NaN) = NaN kips
Engineering Calculators
Interactive design capacity calculators with real formulas from AISC 360-22 and ACI 318-19.
Plastic Moment Capacity
phi_b M_p = 0.9·Fy·Zx
Section Modulus
Sx = Ix / c
Slenderness KL/r
KL/r must be ≤ 200 (compression) / 300 (tension recommended)
Bolt Shear Strength
phi R_n = 0.75·F_nv·A_b·N_b
Fillet Weld Strength
phi R_n = 0.75·0.6·F_EXX·0.707·w·L
Base Plate Bearing
phi P_p = 0.65·0.85·f'c·A1·√(A2/A1)
Concrete Development Length
l_d = (fy·ψt·ψe·ψs / (25·λ·√f'c))·db
Compressive Capacity
phi_c P_n = 0.9·F_cr·A_g