|Typical square tubing, OnlineMetalsStore.com|
|The tube displaces on 0.039 inches, compared to 1.8 inches for the C-channel. The cross section of the tubing makes it considerably stiffer.|
|The square tube experiences about 42 ksi maximum von Mises stress while the channel experiences 138 ksi.|
The design has also been revised to ensure access to lockers that will be beneath the pallet in the mockup. The latest pallet design (called Version 3) is shown below. The material used in the tube channels is typically ASTM A500 Grade B, a low carbon steel that includes copper as one of its alloying elements. Its ultimate strength is 56 ksi -- which is above the 42 ksi estimated by the current FEA analysis.
|Pallet viewed from the top (3D model created in SolidEdge)|
|Pallet viewed from the bottom (3D model created in SolidEdge). The webbing you see adds additional stiffness to that portion of the pallet.|