Originally the obelisks were designed using a reinforced concrete core and rigid weld mesh panel facades. GroundTech Geo Supplies and Services Pty Ltd suggested a cost effective alternative making use of an internal steel frame core and Maccaferri double twist woven Galmac Gabions as a façade. The design eliminated the concrete structure, negated the need for a variety of specialised contractors and resulted in a 60% cost saving and significant reduced building time. When further stages were designed, the alternative woven mesh Gabion structure was adopted for construction.

Maccaferri woven mesh Gabions have been predominantly used for civil type applications but are being well accepted into urban / landscape design projects. Highly experienced Gabion specialist contractors have revolutionised Gabion installation and Gabion retaining walls, free standing structures, weirs and noise attenuation walls are being commonly designed and built in urban design type environments.