Single-Shear Bolted / Dowel Lateral Design Value (NDS Yield-Limit Z)

All six single-shear yield modes (Im, Is, II, IIIm, IIIs, IV) computed from the dowel bearing strengths, the bolt bending yield, and the geometry, with the governing Z the smallest. A 1/2 in bolt into a thin side member almost always governs in mode IIIs. The reference value before the CD / CM / Cg / geometry adjustment factors, which the user applies. A design aid, not a substitute for the engineer of record.

Fe|| = 11,200 G; Fe_perp = 6,100 G^1.45 / sqrt(D); Hankinson blend to theta; Re = Fem/Fes; Rt = lm/ls; Ktheta = 1 + 0.25(theta/90); the six single-shear yield modes Z_Im..Z_IV of Table 12.3.1A; Z = min of the six.

NDS Table 12.3.1A single-shear yield-limit equations, the 12.3.3 dowel bearing strengths, and the Table 12.3.1B reduction terms, by name.

The yield-limit equations, dowel bearing strengths, and reduction terms are published in NDS Chapter 12 (AWC, free read-only at awc.org); the arithmetic is public.

Estimate. AHJ and licensed professional govern.

Field names used by the API: d_in, lm_in, ls_in, gm, gs, fyb_psi, z_im, z_is, z_ii, z_iiim, z_iiis, z_iv, z_lb

• Governing mode Z is the smallest of the six single-shear yield modes; a bolt into a thin side member usually governs in mode IIIsNDS Table 12.3.1A
• Reference value only Z is before the CD / CM / Ct / Cg / C_delta / Ceg adjustment factors and any group / row multiplication; the user applies thoseNDS Table 11.3.1
• Bolt band the 1/4 to 1 in diameter band selects the (4, 3.6, 3.2) bolt reduction terms and excludes small-dowel nails / screws and the geometry / spacing checksNDS Table 12.3.1B