This installation direction takes particular planning such that the loading zone is predetermined by where the joists are such that 30" is available from the end of the tracks and any wall or door opener. The distance of 32" is needed from joist center to wall or joist center to opener chain guide since the track mount point is 2" from the end of the track. (30" is needed for loading zone) Many times the loading zone works best from the center of the garage out, especially if the garage has cabinets or shelves on the side. Double zone loading is rarely a possibility unless the garage is extra wide. (Center of opener to door tracks is 96" and the needed area for the totes to load plus room for the loaded totes is 82" + 30" for loading or 112". 112"- 96" requires use of outer 16"