 The weight of the floor structure was reduced by using open-web steel beams and a lightweight layer of concrete.Along with cap and belt trusses, this flooring system performed a stiffening effect and allowed structural loads to be transferred down through the central steel-framed core and the outer steel-framed façade, eradicating the need for internal columns and providing flexibility for internal spaces.The design of the building was also notable for the ‘total energy system’ which allowed electrical generation using BHP natural gas.