The cotton we used in the Eden AirBeam tents (2014 & 2015 models) was of a particularly heavy duty grade and when it gets very wet, it becomes quite heavy. We have carried out a number of tests and advise that you inflate the AirBeams to 8.0 PSI rather than the standard 7PSI.  To achieve this, we suggest that you inflate the beams without the dump valve attachment, that comes with your pump, and use the gauge to measure the pressure. The needle will rise and fall as the valve in the beams open. While pumping air in, the needle will rise and this will allow you to see when the beam achieves 8PSI.