I need an an engineer to help with specifications and instructions for building wooden storage unit

Looking at building Portable / stackable timber storage units. Each module needs to be 2.6 high x 2.15 wide x 1.8 deep in metres and hold 1.44 tonne thsn can be stacked up to 3 units high . They need to be compliant with Australian standards. Require an engineer to to come up with instructions and specifications explaining the work required to construct and complete a self-storage wooden unit