This revision brings about changes primarily to compression testing, and the definition of small and lightweight packages and when to use height stack values. In this blog post, we will examine the key modifications introduced in the latest revision.
Clarification in Section 3
One of the notable changes outlined in Section 3, specifically in Sub-section 3.2.7, where a new definition for “Small and Lightweight Package” is introduced. This definition, encompassing packages weighing under 10 lbs (4.53 kgs) with a volume below 2.0 ft³ (0.056 m³), aims to provide guidance when determining the maximum stack height (H) factor. Section 3.2.7 was intended to replace Note 3 in ASTM D4169-22.
Update: Paragraph two of Section 11.4.2 was intended to replace Note 3 in section 11.4 of ASTM D4169-22. However, Note 3 was inadvertently left in the ASTM D4169-23 publication, which has led to user confusion. This change along with several other minor editorial changes were identified during a subsequent review and have been rectified in the publication of ASTM D4169-23e1, which was released on March 27, 2024.
Conditioning Standards Enhancement in Section 6
The entire ASTM D4169-23e1 standard sees an added reference to ASTM F2825 – Standard Practice for Climatic Stressing of Packaging Systems for Single Parcel Delivery. Under Section 6 Conditioning, this reference suggests that when testing is conducted using DC-13, the F2825 environmental conditioning may also be applicable, particularly for expedited shipments. This addition acknowledges the importance of testing under conditions that reflect real-world temperature variations, providing a more realistic assessment of packaging system performance.
Streamlining Warehouse and Vehicle Stacking in Section 11
Section 11 includes notable changes in Schedule B (Warehouse Stacking) and Schedule C (Vehicle Stacking). Type 4 for Shipping Unit Construction has been removed for redundancy. The introduction of a Shipping Density Factor (Mf) range, along with an increased default value, directly impacts the theoretical target load force applied to packages during compression.
Noteworthy changes in 11.4.1 suggest varying shipping density factors for mixed load and LTL shipments. The implications of these changes can be observed in real-world examples, highlighting how the revised standard can lead to higher vehicle stacking top loads.
Section 11.4.2 was added to clarify when the user may consider reducing H from the recommended default height of 108 inches. FIG. 2 Maximum Stack Height (H) Decision Matrix should be used to determine that height. Paragraph two of Section 11.4.2 was also intended to replace a portion of Note 3 in ASTM D4169-22 (see above).
Enhancements in Section 12 – Stacked Vibration
Section 12, specifically Schedule D – Stacked Vibration, contains an update in the recommended shipping density (M), increasing it from 10 to 12. This adjustment aligns with the industry’s continuous pursuit of ensuring packaging resilience in diverse environmental conditions.
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