I want to recommend these posts, they are available in different heights and at www.bygma,se you can get them with an embedded nut for a 20 mm post shoe. The small ones, 400 mm high, weigh about 50 kg each and can be lifted by hand. I bought 12 pieces that I laid down last fall for my new project. I plan to use double 45x195 mm pressure-treated beams as a foundation for the floor joists.