Non-traditional warehouses rise as effective solutions to shorten the travelled distances to store and retrieve unit loads, adding aisles crossing the parallel racks. Multiple warehouse configurations are proposed by the literature discussing the enhancements toward standard layouts. In previous contributions, the authors introduced the diagonal cross-aisle model, concluding about its positive impact on the handling performances under single command operations. This paper extends the previous works, integrating dual command operations, through an original analytic model supporting the design of non-traditional warehouses with a couple of symmetric straight diagonal cross-aisles and random storage assignment strategy. The closed-form expressions to compute the expected cycle travel distances are provided, optimising the aisle position. An industrial case study applies the model, getting distance savings ranging from 11 to 17%, compared to standard layout and further considering the loss of storage space due to the presence of the additional aisles.

非传统仓库作为缩短行进距离来存储和检索单位货物的有效解决方案而兴起，增加了穿过平行机架的过道。文献提出了多种仓库配置，讨论了对标准布局的增强。在先前的贡献中，作者介绍了对角交叉通道模型，并总结了它对单命令操作下的处理性能的积极影响。本文通过支持非传统仓库设计的原始分析模型，扩展了先前的工作，将双重命令操作集成在一起，该模型具有一对对称的对角交叉交叉过道和随机存储分配策略。提供了用于计算预期的循环行进距离的封闭式表达式，从而优化了过道位置。