Table K2.1

Available Strengths of Plate-to-Round HSS Connections

Figure description:

Plate-to-Round HSS Connection Types

1. Transverse plate T-, Y-, and cross-connections

• Description: Plates attached perpendicular to the round HSS axis.
• Key Parameters:
  • $R$: Connection strength/load
  • $M$: Moment
  • $\theta$: Angle of connection
  • $D$: HSS diameter
  • $t$: HSS wall thickness
  • $B_b$: Plate width

2. Longitudinal plate T-, Y-, and cross-connections

• Description: Plates attached parallel to the round HSS axis.
• Key Parameters:
  • $R$: Connection strength/load
  • $M$: Moment
  • $\theta$: Angle of connection
  • $D$: HSS diameter
  • $t$: HSS wall thickness
  • $l_b$: Plate length

Connection Available Strength

Plate Bending

Limit state: HSS local yielding

Plate axial load: In-plane: Out-of-plane:

Limit state: HSS plastification Plate axial load: $R_{n}\sin\theta=5.5F_{y}t^{2}\left[1+0.25\left(\frac{l_{b}}{D}\right)\right]Q_{f}$ (K2-2a) In-plane: $M_{n}=0.8l_{b}R_{n}$ (K2-2b) Out-of-plane: – $\phi=0.90$ (LRFD) $\Omega=1.67$ (ASD)