(With apologies to vegetarians and vegans...) Rolling structure for storage and transport of lighting fixtures, usually on six lamp PAR-bars. The photo below shows a MeatRack capable of holding four bars of six PAR64 fixtures each. Depending on the fixture, a MeatRack can hold up to twelve bars (of six S4-PARs). Truss Track Lighting Accessories Supertruss Lighting Bars Another picture: http://www.appliednn.com/e_PLB.php Meatracks can also be used with moving lights, in cases where automated truss is undesirable. A "bungee net" diapers each unit, keeping them from flailing about in transport. Usually built in-house, there are a few manufactured by trussing companies, as well as http://www.ssrconline.com/fixture_carts.pdf. See also this thread: http://www.controlbooth.com/forums/lighting-electrics/6638-touring-fixtures.html .