Carport Decotarp carport design uses only two support poles at the back or side of the structure to create the desired cover. This allows for easy access and free movement under the carport. This design can be used as a double cantilever for larger car parks fixed on a side by side basis or back to back basis making the application very practical. Sizes can vary from one car to a continuous line upwards of 100 meters. The carport structure is suitable for use with shade or waterproof fabric.