Three/Four Legs Self-supported Tubular Towers

Design Code:

1. Chinese National Standard:

a. DL/T 5154-2002 Technical Regulation of Design For Tower and Pole Structures of Overhead Transmission Line

b. DL/T 5219-2005 Technical Regulation for Designing Foundation of Overhead Transmission Line

2. American Standard:

a. ASCE 10-97-2000 Design of Latticed Steel Transmission Structures

b. ACI 318-02 Building Code Requirement for Structure Concrete

Design Software: PLS and MS Tower, SAP2000, AutoCAD, STW, TWsolid, SLCAD etc

Voltage: 33KV, 66/69KV, 110KV, 220KV/230KV, 330KV, 380/400KV, 500KV, 750KV, 800KV, 1000KV Transmission Line

Hot-dip galvanization: ISO 1461-2009, ASTM A123

Steel Grade:

1. High strength low alloy structural steel: Q420B which is equivalent with ASTM Gr60

2. High strength low alloy structural steels: Q355B which is equivalent with ASTM Gr50 or S355JR

3. Carbon Structural Steel: Q235B which is equivalent with ASTM A36 or S235JR

Bolts and Nuts: Mainly ISO 898 grade 6.8 and 8.8 bolts for Both Chinese, ISO and DIN standard

Tower Type: Suspension Tower, Tension Tower, Dead Tower, Substation Structure