The web brace member of the embedded truss was equal-leg double steel angles ∟25 × 2 for specimens S-1 and S-2 and ∟30 × 4 for S-3. The shop welded 180 mm × 68 mm × 6 mm endplate connection was introduced to join the chord and web brace of the embedded truss. Detailed dimensions of the truss members are also shown in Fig. 2.