1 / 23

Determining Pallet Maximum Working Loads From Nominal Load Measurements

Determining Pallet Maximum Working Loads From Nominal Load Measurements. Marshall S. White Wilbur Dibling Ralph Rupert John McLeod. Most Loads on Pallets do not act Like Airbags or Two Rigid Bars as in Draft ISO 8611-1 Tests 1 and 3.

jagger
Download Presentation

Determining Pallet Maximum Working Loads From Nominal Load Measurements

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Determining Pallet Maximum Working Loads From Nominal Load Measurements Marshall S. White Wilbur Dibling Ralph Rupert John McLeod

  2. Most Loads on Pallets do not act Like Airbags or Two Rigid Bars as in Draft ISO 8611-1 Tests 1 and 3

  3. Certain Loads on Pallets will “Bridge” across the Pallet Deck. In Warehouse Racks, Some Loads will Shift Stresses from the Center of the Pallet to the Rack Supports

  4. We Tested Different Load Configurations To Determine The Level Of Load Bridging In A Warehouse Rack

  5. We Tested The Following Load Stabilizers • Interlock Stacking • Stretch Wrap • Strapping (steel and poly) • Breakaway Adhesive • Pallet Tie Sheets • Stretch tape

  6. We Used Plywood To Simulate Pallets And Used 4 Different Stiffness Levels of Pallets 5.3 kN per cm of deflection 3.6 kN per cm of deflection 2.3 kN per cm of deflection 1.6 kN per cm of deflection

  7. Each Load Was Lifted 5 Times To Simulate Typical Loosening Of Load After Palletization

  8. Airbag Airbag Airbag Airbag Column Column Column Column Interlock Interlock Interlock Interlock Adhesive Adhesive Adhesive Interlock,SW Interlock, ST Interlock,SW Interlock,ST Interlock,SW Interlock,ST Interlock,SW Tie Sheets Tie Sheets Tie Sheets Tie Sheets Interlock,ST Column,ST Column,ST Column,ST Column,ST Stretch Tape Stretch Tape Stretch Tape Column,SW Column,SW Column,SW Column,SW Case Goods, Average Deflections at 4.5 kN 25.0 Low 20.0 Medium-Low 15.0 Deflection (mm) Medium High 10.0 5.0 0.0

  9. 25.0 20.0 15.0 10.0 5.0 0.0 ST SW Interlock, Interlock, Airbag Interlock Column Adhesive Column,ST Tie Sheets Column,SW Stretch Tape Case Goods, Average Deflections at 4.5 kN, Low Stiffness Panel Deflection (mm)

  10. 25.0 20.0 15.0 10.0 5.0 0.0 Airbag Column Column, Column, ST Strp Int, Plas SW Interlock ST Interlock, Interlock, SW Sacks, Average Deflections at 4.5kN, Low Stiffness Panel Deflection (mm)

  11. The Effect of Load Geometry on Load Bridging During Warehouse Rack Storage on Pallets

  12. Average Pallet Deflection as a Percent of Column Stacked Deflection 100 80 60 Percent Deflection 40 20 0 Column Stretch Interlock Pallet Stretch Adhesive Strapping Stacked Tape Stacked Sheets Wrap Load Stabilizers The Effect of Load Stabilizers on Load Bridging During Warehouse Rack Storage of Cased Goods on Pallets 100 100 96 94 87 80 61

  13. The Effect of Load Stabilizers on Load Bridging During Warehouse Rack Storage of Sacked Products on Pallets

  14. The Effect of Load Stabilizers on Load Bridging During Warehouse Rack Storage of Column Stacked 5 Gallon Pails on Pallets

  15. The Effect of Load Stabilizers on Load Bridging During Warehouse Rack Storage of 55 Gallon Drums on Pallets

  16. Implications of Load Bridging Tests on Estimates of Maximum Working Loads for pallets as described in Draft ISO TS8611-3 Geometry and mechanical properties of the package or container on the pallet affect the maximum working load estimate The types of load binders used affect the maximum working load estimates The tension applied to the load binders affects the maximum working load estimates

  17. Implications of Load Bridging Tests on Estimates of Maximum Working Loads for pallets as described in Draft ISO TS8611-3 The package or container stacking patterns affect the maximum working load estimate The stiffness of the pallet affects the maximum working load estimates Normal movement of the unit load changes unit load stiffness and therefore affects the maximum working load estimates

More Related