Structural Steel Erection Services

**Exclusions/References:** - Units mainly engaged in - (a) the construction of buildings (which incorporate structural steel components) are included in the appropriate classes of Subdivision 30 Building Construction; and - (b) the construction of complete structures such as bridges, towers or oil refinery plants (which incorporate structural steel components) are included in the appropriate classes of Subdivision 31 Heavy and Civil Engineering Construction. **Primary Activities:** - Metal silo erection - Metal storage tank erection - Reinforcing steel erection - Structural steel erection - Truss or joist, steel, erection - Welding work on construction projects