If these models were to be considered as the foundation for the principal design, certain factors would need further investigation, including:
• Non-collapsible side frames.
• Design a product where the glide rail has a minimum internal width of 4m.
• Weight and height of each part/piece (dependent on material) as they would need to be carried quickly over 100m to the site.
• Aluminium alloy could be used for certain sections due to its high strength to weight ratio (one of the examples given contained a combined total weight of 100kg).
• Material used for cables and ropes (i.e. stainless steel).
• Each piece needs to have restricted dimension sizes in order to be transported by a 4x4 vehicle (some models can quickly fold into 7 pieces).
• Assembly needs to support a minimum load of 1000kg.
• Powered winch can be used to rapidly lift the load.
• Pin type connections could be used as they require no spanners or wrenches or other hand tools, this reduces weight and may increase speed of assembly.
• No need for a counter balance/ anchoring as required by models such as the jib crane.
• Wheels would not be considered due to the type of terrain the crane would be required to operate on (often not plane or rubble).
• Adjustable leg stands could allow the height of the gantry crane to be altered depending on how uneven the terrain is found to be (fitting a spirit level into the model can assist in assuring balance of the glide rail is achieved before the load is lifted).
www.ghequipment.com.au/products/cranes/portcranes.htm
www.aluminiumcraneco.com/portable-gantries-gantry-crane.htm
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