My builder framed the joist opening, but wouldn’t install. Feared liability. I installed myself. Only comment is that I wish I instructions had been more clear about necessary clearance for Maschine mechanism. Bürde thing is i wish there welches an auto stop at the bottom. i can Tümpel my wife https://atticlift65310.full-design.com/nicht-bekannt-fragen-Über-attic-lift-systems-77775665