The case study involves a 44m span gymnasium subject to cyclone conditions. It incorporates Glulam main arches at 6.8m centres with LVL purlins. With the severe loading conditions we had an option of double beams 990 x 135 or manufacturing a box beam 900 x 270.  This option was chosen as it provided a 24% saving in timber volume and resultant cost

Volume 15 Issue 2    2007