1, Gravity racking system makamaka imakhala ndi zigawo ziwiri: static racking structure ndi dynamic flow njanji.
2, njanji zothamanga zamphamvu nthawi zambiri zimakhala ndi zodzigudubuza zonse, zomwe zimatsika pang'onopang'ono kutalika kwa rack.Mothandizidwa ndi mphamvu yokoka, mphasa umayenda kuchokera kumapeto okweza mpaka kumapeto otsitsa, ndikuwongoleredwa bwino ndi mabuleki.