AISC 360 Parts
Tables
LRFD φ & ASD Ω Design Factors
Resistance factors φ (LRFD) and safety factors Ω (ASD) by limit state - ANSI/AISC 360-22
| Limit state | φ (LRFD) | Ω (ASD) | AISC 360 ref. |
|---|---|---|---|
| Tension - yielding of gross section | 0.90 | 1.67 | §D2(a) |
| Tension - rupture of net section | 0.75 | 2.00 | §D2(b) |
| Compression - members (flexural buckling) | 0.90 | 1.67 | §E1 |
| Flexure - bending | 0.90 | 1.67 | §F1 |
| Shear - rolled I-shapes, stocky web | 1.00 | 1.50 | §G2.1(a) |
| Shear - all other cases | 0.90 | 1.67 | §G2.1(b) |
| Bolts - shear and tension | 0.75 | 2.00 | §J3 |
| Welds - fillet, groove, PJP | 0.75 | 2.00 | §J2.4 |
Two design formats. AISC computes one nominal strength Rn per limit state, then applies φ (LRFD) or Ω (ASD) - LRFD: Ru ≤ φRn; ASD: Ra ≤ Rn/Ω (φ·Ω ≈ 1.5).
Rate thisNo ratings yet
Sign in to join the discussion.
Loading…