Testing Standard:
TAPPI T839 Edgewise Compressive Strength of Corrugated Fiberboard Using the Clamp Method (Short Column Test)
Standard Number
TAPPI T839
Standard Title
Edgewise Compressive Strength of Corrugated Fiberboard Clamp Method (Short Column Test), Test Method
Overview:
TAPPI T839 Test Method details the method of obtaining the maximum compression strength measurement perpendicular to the flute axis of corrugated fiberboard. TAPPI T839 utilizes a spring support clamp fixture to reduce edge rolling of the material during testing. Purple Diamond Testing offers TAPPI T839 Edgewise Compressive Strength of Corrugated Fiberboard Clamp Method (Short Column Test) as part of our packaging compliance and validation services.
Rationale:
TAPPI T839 – Edgewise Compressive Strength of Corrugated Fiberboard Clamp Method (Short Column Test). Data collected can be used along with flexural stiffness and box dimensions to accurately predict the overall top to bottom compression strength of corrugated boxes. Utilizing a clamp fixture reduces the potential of edge rolling of the linerboards during testing. The max force to cause compressive failure is recorded as the ECT value.
Key Points:
- Critical to validating material selection during box design
- Verifies strength of corrugated boxes according to Box Maker's Certificate (BMC)
- Consider TAPPI T838 ECT (Neckdown Method) for materials that exhibit excessive edge rolling during other ECT methods such as TAPPI T811 (Wax Dip) or TAPPI T839 (Clamp)
Related Standards:
- ISO 3037 – Corrugated Fiberboard – Determination of Edgewise Crush Resistance (Unwaxed Edge Method)
- TAPPI T811 – Edgewise Compressive Strength of Corrugated Fiberboard (Short Column Test)
Related Testing Standards
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