It has been decided that the most practical design would be a gantry crane. This has alleviated the problems of legs, centre of mass problems and counterweights and as such can be made relatively lightly, however the focus for the group is to look at a collapsible main beam which is to be of 4m in length. Different ways of joining the beam and on starting the CAD design. My design for the collapsible beam is a simple one but it is one that allows for the pulley system of the crane to still movefreely along the beam (on the inside).These can even be made lightweight through use of aluminium and can be stored easier in the back of pick ups.
My proposal for a Gantry crane (pictured left) it has the collapsible beam so it can be taken apart and split into 2x2m sections, an I beam as this gives the best performance for picking up a load directly beneath it. It has fully adjustable legs which can be used on uneven ground, The A shape can be made collapsible also to aid in transportation. Important to note the top of the A shape has a metal plates which strengthen the join at these points. It will also incorporate a manual hoist which will slide along the interior of the I beam. The height of the crane vertically will be no more than 2 m , this allows for long beams to be brought out and moved over small amounts of rubble efficiently. The structure to be able to save weight , will be of high strength aluminium which may be more expensive but its advantages in terms of weight and transportation by hand far outweigh the higher cost. There may be a problem due to the I beam that the crane may have a tendency to tip over sideways , however having enough angle on the legs should remedy this.
My proposal for a Gantry crane (pictured left) it has the collapsible beam so it can be taken apart and split into 2x2m sections, an I beam as this gives the best performance for picking up a load directly beneath it. It has fully adjustable legs which can be used on uneven ground, The A shape can be made collapsible also to aid in transportation. Important to note the top of the A shape has a metal plates which strengthen the join at these points. It will also incorporate a manual hoist which will slide along the interior of the I beam. The height of the crane vertically will be no more than 2 m , this allows for long beams to be brought out and moved over small amounts of rubble efficiently. The structure to be able to save weight , will be of high strength aluminium which may be more expensive but its advantages in terms of weight and transportation by hand far outweigh the higher cost. There may be a problem due to the I beam that the crane may have a tendency to tip over sideways , however having enough angle on the legs should remedy this.
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