雙深度貨架在一個深度方向能存儲兩個托盤，如果是雙面取貨貨架，則可以存儲四個托盤深度。雙深度貨架降低了通道占用的空間，增加了存儲密度，但同時降低了托盤的揀選性，同時遵循先進后出的原則，50%的即時存取率使得該系統(tǒng)具有合理的存儲流通性，同時也很好地利用了空間。這個系統(tǒng)最適合于每種存儲物品種類和托盤數都多于幾個托盤的情況。該系統(tǒng)必須使用能伸入貨架的特殊叉車。由于受到貨物重量的限制，叉車提升高度一般最多可達到9米左右。如果需要，系統(tǒng)的上層可以配導軌以幫助叉車司機存取托盤，同時又有助于減少叉車操作人員的失誤及由此帶來的破損。
Double deep racking can store two pallets in one depth direction. In the case of double sided racking, four pallets can be stored in one depth direction. Double deep racking reduces the space occupation of channel and increases the storage density, but decreases the selectivity of pallets. At the same time, First In Last Out (FILO) principle is followed, and the immediate storage rate of 50% provides such system with reasonable circulation performance and effective utilization of space. This system is particularly suitable for the case in which each kind of goods is stored in many pallets. This system requires special forklift that can extend into the racking. Due to the restriction of goods weight, generally the maximum lifting height of forklift is 9m or so. If necessary, guide rails may be installed on the top layer of the system so that the forklift driver can deposit or take out pallets conveniently and miss-operation of operators and associated damages can be reduced.

優(yōu)點：
由于巷道數的減少與標準型托盤貨架系統(tǒng)相比存儲密度提高了50%的即時存取率及合格的周轉率。
托盤位使用率通常高達90%。
底層的托盤不直接存放與地面，更加安全和易于操作。
雙深度搬運工具（叉車）可用于其他任務。
Advantages:
Due to reduced number of aisles, this system improves the immediate storage rate and eligible turnover rate by 50% with respect to storage density compared with standard pallet racking.
Generally the pallet location use rate is up to 90%.
The bottom pallets are not directly placed on floor, leading to higher safety and easier operation.
Double deep handling vehicles (forklift) can be used for other tasks.