Hello, I am working on a project bunk bed open and I will be happy for help. The basic idea is that the bed bed on the second floor relies on two pillars opens, telescope-shaped (like a crowbar Salafi), so that the columns will hold the bed and it will be possible to raise and lower it. I wondered what would be the best way to produce the columns so long Siiamdo weight at the same time be able to open and close easily? What material it is recommended to make the pages? Any idea is welcome!  Thank you.l