ISTA Views

MAY | 2018

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> MORE ON PAGE 19 17 ista views • May 2018 • www.ista.org Tilt Test The tilt test was designed to replicate the gravitational forces exerted on the palletized load during specific conditions such as truck acceleration, stopping and turning. This test was established to study the responses of a unit load under tilt stresses towards simulating load shifts during transportation activities. Tilt angles of 5, 10, 15, 20, 22.5 and 25 were considered for the experimentation. Testing conditions for ISTA Procedures 3B and 3E, as related to personnel safety, was also considered. Apparatus The tilt test apparatus was designed to withstand the static and dynamic forces exerted during various tilt angles for the unit load of product. The tilt test apparatus was constructed with wood as shown in Figure 5. Figure 6 shows the recommended method to perform tilt tests using the apparatus. A vertical measuring tool was also designed to determine the amount of offset of the cases on the unit load. The laser measuring tool, Bosch model DLR130K (Palo Alto, California, USA), was utilized to record the measurements. The vertical measuring tool was constructed utilizing square steel telescope tubing for the main structure. The laser measuring tool fixture was built with a square steel telescope tubing, a strip aluminum sheet and a device holder/cradle. Figure 7 below provides details of the construction and assembly. After visually identifying the most protruding cases of packaged product for each layer, the precise location of maximum protrusion for each case should be confirmed, marked and measured using the vertical measuring tool. To quantify the stability of the unit loads, offset measurements were taken between the water cases in relation to the pallet edge. Figure 5: Tilt Test Apparatus Design. (Dimensions shown in centimeters) Figure 6: Tilt Test Experimental Setup Figure 7: Vertical Measuring Tool Design. (Dimensions shown in centimeters)

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