K3HSS-to-HSS truss connections

HSS-to-HSS truss connections consist of one or more branch members directly welded to a chord that passes as a continuous element through the connection. Such connections shall be classified as follows:

K3.1 Definitions of Parameters

$O_{v}=l_{o v} / l_{p} \times 100, \%$

• eccentricity in a truss connection, positive being away from the branches, in. (mm)
• g = gap between toes of branch members in a gapped K-connection, neglecting the welds, in. (mm)
• $l_{b}=H_{b} / \sin \theta$, in. (mm)
• $l_{o v}=$ overlap length measured along the connecting face of the chord beneath the two branches, in. (mm)
• $l_{p}=$ projected length of the overlapping branch on the chord, in. (mm)
• $\zeta$ = gap ratio; the ratio of the gap between the branches of a gapped K-connection to the width of the chord $=g / B$ for rectangular HSS

K3.2 Round HSS

The available strength of round HSS-to-HSS truss connections, within the limits in Table K3.1A, shall be taken as the lowest value obtained according to the limit states shown in Table K3.1.

K3.3 Rectangular HSS

The available strength, $\phi P_{n}$ and $P_{n} / \Omega$, of rectangular HSS-to-HSS truss connections within the limits in Table K3.2A, shall be taken as the lowest value obtained according to limit states shown in Table K3.2 and Chapter J.

User Note: Outside the limits in Table K3.2A, the limit states of Chapter J are still applicable and the applicable limit states of Chapter K are not defined.

User Note: Maximum gap size in Table K3.2A will be controlled by the e/H limit. If the gap is large, treat as two Y-connections.