Formulas: Round HSS

Formula 1

Then, $0.75\left(0.6 F_{u}\right)=0.45 F_{u}$ would yield a very similar value to $0.95\left(0.6 F_{y}\right)=0.57 F_{y}$, and in fact, the latter is even more conservative for HSS with specified nominal $F_{y} / F_{u}$ ratios less than 0.79 .

Formula 2

Formula 3

Equation K3-1 need not be checked when $D_{b}> (D-2 t)$ because this is the physical limit at which the branch can punch into (or out of) the main tubular member.

Found in

• HSS-TO-HSS TRUSS CONNECTIONS