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Wabash National Corporation Diamond Doors … It’s an Evolution in Roll-Up Doors

Wabash National Corporation Diamond Doors … It’s an Evolution in Roll-Up Doors. Introduction. Types of Doors Problems based on type Evolution Introduction Evolution Testing Benefits to the OEM. Types of Doors. Standard ¾” Plywood Door Aluminum Clad Plywood Door Extruded Aluminum Door

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Wabash National Corporation Diamond Doors … It’s an Evolution in Roll-Up Doors

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  1. Wabash National CorporationDiamond Doors … It’s an Evolution in Roll-Up Doors

  2. Introduction • Types of Doors • Problems based on type • Evolution Introduction • Evolution Testing • Benefits to the OEM

  3. Types of Doors • Standard ¾” Plywood Door • Aluminum Clad Plywood Door • Extruded Aluminum Door • Insulated Door

  4. Types of Doors, cont. • The majority of doors sold today have a plywood core. • The only improvements have come in the way of coatings and outer skins, neither solve the fundamental problem. • Extruded and insulated doors are expensive and ill-suited for the dry freight market.

  5. Problems with Plywood Types • Prone to Cracking • Absorbs Moisture • De-lamination of the Outer Coating • Paint Adhesion • Corrosion on Hardware

  6. Problem: Cracking • Plywood doors are prone to cracking when impacted. • Coatings and laminated skins help, but cannot eliminate a crack or inner-core shear event.

  7. Problem: Moisture Absorption • All wood com-ponents absorb moisture. • Swelling and shrinking are common based on moisture content, as is a gain in weight.

  8. Problem: De-lamination of the Outer Coating • Attributed to moisture absorption, shrinking & swelling. • Impacts and daily wear and tear contribute to this type of failure. • Quality of bond and coating is paramount.

  9. Problem: Paint Adhesion • Wood and/or paper not the best substrate for paint. • Poor adhesion or bad preparation can lead to paint failure. • Moisture absorption, shrinking and swelling put stress on paint or coating.

  10. Problem: Corrosion • Failure in or lack of plating on fasteners. • Galvanic reaction with dissimilar metals can be a cause. • Moisture in wood accelerates failure.

  11. Problems with Extruded Doors • Expensive. • Aluminum can take a permanent set easily, unforgiving in impact. • Difficult to paint or coat without expensive and careful preparation. • Summary: Not suited for the rigors of the dry freight market.

  12. Problems with Insulated Doors • Expensive. • Complex designs with many parts. • Usually too stiff, unforgiving in impact. • Fail by compression loading of outer skin (de-lamination of skin to foam). • Summary: Not suited for the rigors of the dry freight market.

  13. Introducing the Evolution • A new dry freight roll-up door system that improves on all of the problems associated with plywood doors. • Not only has the panel changed to a composite material, every facet of the door assembly has been reviewed and improved.

  14. The Evolution The material… • A composite panel comprised of steel skins and a plastic core. • Ideal weight to strength ratio that compares favorably to plywood. • Non-hydroscopic, no swelling, shrinking or weight gain due to moisture.

  15. The Evolution The system… • Stainless steel fasteners eliminate corrosion and galvanic reaction between dissimilar metals. • High tensile hinges reduce elongation and keep the joint together in an impact. • Premium seal package helps keep the cargo dry.

  16. Evolution Testing • Stiffness Testing • Puncture Testing • Hardware Attachment Testing • Impact Testing • Corrosion Testing

  17. Stiffness Testing • Full scale 4pt. Bend utilizing 2 panels & 5 hinges. • Plywood door failed above 9”. • Evolution door went to 11” (end of stroke of cylinder) w/o failure.

  18. Stiffness Testing Plywood Evolution

  19. Puncture Testing • Tested various grades of plywood, 2,676 lbf. (avg.) to puncture. • Evolution barely dented at 2,798 lbf. and punctured at 4,810 lbf. • Fork lift tine used.

  20. Hardware Attachment Testing • Hinges mounted to 6”x6” panel material and pulled in tension. • Hinges typically fail before fastener to substrate. • H.S. steel hinges will improve system dramatically.

  21. Impact Testing • Tested with pallet jack at full speed. • Tested with large, Post Office mail cart with and without load bar. • Hinges failed after multiple impacts, H.S. will improve system.

  22. Corrosion Testing • Panels subjected to ASTM B117 Salt Fog test for 1,000 hours. • Results show no red rusting of skin edges, some oxidation. • No paint lifting, flaking or pitting.

  23. Evolution Summary • A superior door design that answers all of the problems of plywood & plywood hybrid doors. • The simplicity of a plywood door without the complexity of an insulated door. • A field-proven composite material that is accepted in the industry.

  24. Benefits to the OEM • A superior door to compliment a superior trailer design. • Customer satisfaction in reduction in damage and maintenance costs. • Greater margin opportunity to the OEM because of the higher price of the door.

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