Issue link: https://cp.revolio.com/i/989729
20 ista views • May 2018 • www.ista.org Test Methodology The identification of faces and layers for the unit load was identical to that described in Section 2.2.2. The testing procedure for the incline impact test is detailed in Table 2 below. Results and Discussion The observations for pre-, mid- and post-tests are placed in Tables 3-5 for both stacking patterns (AABBAA and AAAABB) for tilt tests, and in Tables 7 for incline impact tests. Evaluation of Stability of Unit Loads for Tilt and Shock Events During Distribution > CONTINUED FROM PAGE 19 Step Action 1 Prepare one-unit load for each replicate test of packaged product for each stack-pattern as stated in Section 2.2.2. Identify the Faces and Layers as shown in Figure 6 2 Apply the stretch wrap per specifications identified in Section 2.1. Allow 1 hour of relaxation time for all stretch wrapped unit loads prior to testing Pre-test offset measurement 3 Measure the pre-test offset for each layer of Faces 2, 4, 5 & 6 of the unit load as stated in Section 2.2.1 and record in the values in Table 5. Identify the faces with the largest offset between Faces 5 & 6 (along the length of the pallet) and Faces 2 & 4 (along the width of the pallet). The two faces identified with the larger pre-test offset will be impacted in step 4. Mid-test offset measurement 4 Use a modified inclined impact tester as described in section 2.3.1. Center the unit load in the proper orientation on the carriage, with the edge of its pallet in contact with the leveling apparatus stop block (Figure 9). 5 Impact the selected face between Face 5 & 6 per Step 3. The required impact velocity for the inclined-impact test is approximately 0.74 m/s 6 Allow the carriage to roll back to the starting position. 7 Reposition the unit load on the carriage and impact the selected face between Face 2 & 4 per Step 3. The required impact velocity for the inclined-impact test is approximately 0.74 m/s 8 Record mid-test offset as stated in Section 2.2.1 and record the values in Table 5 Post-test offset measurement 9 Repeat Steps 4-8. * 10 Record post-test offset measurements in Table 5 Table 2: Incline Impact Test Procedure * Each of the two Faces selected from pre-test offset measurements receives one impact each during the mid-test and post-test.