The GT7004E Overhead Storage Rack 4 x 4 ft. allows you to use that valuable ceiling space you own but probably don’t use efficiently. (i.e., Maybe you install a couple of ceiling hooks for hanging a bike.) This rack has a capacity to provide 53 cubic feet of space when the full drop distance of 40″ used. There are 2 other preset drop distances of 30 and 20 available. The most popular application for this rack is to install two of them above the garage door on each side of the door track. For garages with low ceilings the choice is often for installation to be at the back of the garage above the vehicle(s) hood. The types of items most commonly stored are those with seasonal needs. This might include bulky holiday house yard decorations seasonal sporting equipment or those large plastic bins. The use of wire mesh shelves allows to for easily viewing what is stored on the rack. This rack can be installed to wooden ceiling and floor joists not to metal joists or concrete ceilings. Supplied with the rack components are four brackets which directly screw into wooden ceiling joists. Another option is to install on our Ceiling PowerTrak. When installing directly to the ceiling joists you are limited to installing the rack posts directly under the joists but when using the Ceiling PowerTrak the rack location is independent of the joist locations. The GT9154E Round Ceiling Trak Connector is needed when mounting the Overhead Storage Rack (GT7004E) to the Ceiling PowerTrak. This connector set is not supplied as an included part with the Overhead Storage Rack but needs to be ordered as an additional component.