African Design Magazine November 2015 - Page 27

African project Ethiopian Airlines Hangar SOLUTION December 2014. “Hatch Goba provided a unique design solution that addressed these challenges by means of a unique 85 m arched truss system,” explains Pierre Olivier, managing director: AEM, Hatch Goba. The arched trusses comprised 11.8-m-long segments fabricated from lightweight square hollow sections, forming boxed trusses. The arch effect, combined with the use of these hollow steel sections, resulted in significant material savings. The total structural steel tonnage, inclusive of purlins, amounted to 240 tonnes, or 39 kg/m2. The span involved meant that the arched trusses required aerial connection at the crown. This was achieved by means of temporary support on a mobile support tower. The door pock ]