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 motor mechanism. Install the control Struktur: Depending on the type of control Struktur you’ve chosen, follow the manufacturer’s instructions to https://collinyelsx.wikigop.com/1408636/attic_lift_dinge_zu_wissen_bevor_sie_kaufen