Mackie Moving Systems Inc. is an international logistics solutions company that operates several warehouses across Canada. Mackie provides a very diverse range of logistic solutions to businesses and individuals. Some of these services include freight and vehicle transport, household moving, inventory management, warehousing, and storage. Mackie warehouses store customer products on large steel frame racking systems, called pallet racks. In most cases, rows of pallet racks are lined up back-to-back to maximize storage capacity. They are usually three to five bays tall, depending on the height of the warehouse. As customer requirements change, the warehouse configuration and rack assembly must change as well. This means pallet racks often contain a variety of components originating from different manufacturers, and irregular shelving arrangements. As a result, the actual storage capacity of each pallet rack in the warehouse is difficult to verify.
Andrew Katz, a co-op student from University of Waterloo, was asked to analyze and determine the storage capacities of Mackie pallet racks based on beam size.
The teaching objective for this case study is force analysis of structures and structural components, equilibrium of deformable bodies, stress and strain concepts. The case study provides a detailed analysis and comparisons on Cross-Section Properties and Failure Modes of a beam and column structure. This case can be used as an effective material for Mechanics of Deformable Solids 1 (ME 219), Statics and Solid Mechanics (CIVE 204) and Mechanics of Deformable Solids (SYDE 286) courses.