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 Murl mechanism. Conversely, the Auxx-Lift requires some lift-over, especially along the "long" side of the platform deck due to the https://atticstorageliftsolutions87431.wikifrontier.com/8192897/nicht_bekannt_fragen_Über_attic_lift_systems