因
I
／
了
Il
＠
／
I2
\
/
\
I
Il
Step 5: Insert Upper Slant Bar (G1) into Lower Slant Bar (G2 1);
Insert Middle Top Bar (I1) into Middle Top Bar 2 (I2).
Step 6: Connect Middle Top Bar 1 (I1) and Top Connector (J);
Connect Middle Top Bar 2 (I2) and Across Beam 1/2 (C1/C2) by Bolt (BB).
