The old iron tanks were made corrugated for strength. Corrugated sheets of iron were crimped to give them strength when pressure is applied to the side of the sheet. So you can imagine what difference this would make to a flat sheet of iron. This too, is true of poly rainwater tanks. The corrugations make the walls of the tank stronger, therefore able to withstand the weight of water. As you may know, 1000L of water equals one ton. So in a 5000 gallon poly rainwater tank there is twenty-two and a half tons of water. So making a tank strong enough to hold this weight for at least 20 years is very important.
Australia is, beyond any doubt, the home of corrugated iron, so much so that it was a star in the “Tin Symphony” at the closing ceremony of the Sydney Olympics. It has been represented so many times by artists and architects who have interpreted its history and exploited its associations.
It is the building material that made the bush, and played a strong role in the settling of Australia. We’re all familiar with the distinctively Australian buildings that utilise this material. The shearing shed, the Queenslander, the woolshed, the outdoor dunny, and the ubiquitous water tank that is essential to our country’s development and survival. And today corrugated iron is still used, even in modern architecture.
A corrugated poly rainwater tank blends in well with the corrugated roof and walls of a shed or home and provides a truly Australian style