The design and construction of a shallow double layered geodesic dome - a project completed for the 2003 European Small Nations Games in Malta

Abstract

The paper describes the structural conception, design, fabrication and erection of a 47 metre span spherical dome roof structure, consisting of a shallow double-layered steel geodesic framework, covering a square plan area at the National Sports Complex in Malta. A detailed look at the processes involved for the successful completion of an aesthetically pleasing structure in the midst of five hundred year old imposing historic fortifications, which also offered various structural challenges for the local construction industry, is presented. The geometric configuration of the dome is explained, together with a review of the structural analysis techniques employed for the design and erection stages of the structure, with particular emphasis on the latter. The choice of using square hollow sections is amplified, together with the implications on the main joint design. A comprehensive description of the manufacturing processes involved is undertaken, with reference to the construction of the jigs required and the dimensional accuracy achieved. The complete design and construction process was tailor made for the job by local designers and steelwork manufacturers.