Initial crane Design

Above is my initial Crane Design. Looking at the proposal specification i tried to keep my initial design simple, this makes it easier to manufacture, assemble and maintain.
The above Gantry style crane has numerous features that make it ideal for the task it is being designed to work with, these are as follows:

• The crane would be made out of a lightweight, yet tough, material such as an aluminium alloy.
• There are rubber feet on the bottom of each of the four legs to help the crane grip when in use. Another advantage to using these rubber feet is that, it's the easily replaceable rubber feet that wear over time, not the bottom of the aluminium crane legs.
• The length of the I-beam along the top is a length of 4m, allowing for the specified travel span.
• The 4m long I-beam can be split in the middle to allow for easier portabillity.
• The legs will be a hollow form of bar stock that will be lightweight and cheaper to buy without losing any vital strength.
• The crane can be easily taken apart and re-assembled on-site, thus making it very portable without excess parts to carry (minimal components involved).