3.1.2. Material Characteristics

The grid beams, struts and additional roof support of the MSL-S roof structure are all made of the Q345 steel with an elasticity modulus of 2.06 × 10<sup>5</sup> N/mm<sup>2</sup> and a volume density of 7.85 × 10<sup>3</sup> kg/m3. While the cables have PE finished products composed of Φ5 or Φ7 high-strength steel wires with an elasticity modulus of 1.95 × 10<sup>5</sup> N/mm<sup>2</sup> and a tensile strength of 1.67 × 10<sup>3</sup> MPa.
