Modular Small Expandable Dwelling - work in progress
The objective of this project is to develop a design for a dwelling based on a 3.5m x 7m module. These dimensions are chosen because:

• The size lends itself to efficient prefabrication.
• A building frame of this size can be carried on a standard flatbed truck without triggering “exceptional load” requirements, eg flags, police escort etc.
• A single module is large enough to provide enough space for a single person or couple, and additional modules can be added as/when required.
• The weight, 2 – 3 tonnes depending on the level of completion, can be off-loaded and placed using a road-based crane.
• The  module can be constructed in machine-graded treated pine or cold-formed steel sections of moderate size.
• Variations in roof/ceiling type can be accommodated, eg standard trusses, monopitch or raked ceiling.
• A limited range of fabrication drawings are required, and are easy to modify.
• The design is suitable for low-set or slab-on-ground.

It should be noted that it is not intended that the project will become a proprietary product. To enforce this it may be necessary to place the plans and specifications in the public domain. it will remain a basic design and specification that anyone can use. It is intended to develop this project by preparing further drawings and obtaining engineering certification to C2 cyclone rating. Current drawings two-page A3 pdf containing images as xrefs. (The original CAD drawings were lost.)

Rainwater tanks - Townsville Region Results of simulation August '04 to May '12, PDF file.
(Summary of evidence that the mandatory provision of rainwater tanks would be a huge waste of resources.)