Stacking height
| Stacking height |
|---|
| See also |
Stacking height is the distance between the floor and the lowest point of overhead obstructions (maximum height of stacking). Overhead obstruction means[1]:
- joists,
- sprinkler heads,
- rafters,
- roof trusses,
- beams,
- lighting fixtures,
- duct work .
Other definition says, it s determined number of pots (shipping boxes or carrier pallets) that can be stacked together. Stacking height may be transferred into cost factor - higher stacking is possible, more goods will fit in. Cost factor is one of the most important factors when stacking place is designed[2]
Maximum stacking height
Maximum stacking height depends on [3] [4]:
- general conditions,
- heights of the pallets,
- load weights,
- safety limits,
- clearance height of the warehouse,
- honeycombing,
- fluctuations in the inventory level
- the length of the lanes,
- stacking rules,
- the lane width and length,
- type of product,
- type of equipment (automated or manual).
Stacking strategy
Stacking strategy influence the final design of stacking place and costs which warehouse will produce. The main objectives of stacking strategy are [5]:
- Storage space should be used in efficient way,
- Transportation time from quay to stack and beyond, (and vice versa) should be limited - usually four time dimensions are calculated: long term (years, decades), medium (months), short (days) and real (minutes and seconds),
- Reshuffles should be avoided - when bottom container is taken, top container has to be moved somewhere else which is called reshuffle or unproductive move and it takes time.
Depending on chosen stacking strategies, different products will land on different high[6]:
- category stacking strategy will group products in categories and stack them accordingly,
- residence time stacking will stack products depending on arrival or departure time.
Author: Jolanta Lesnicka
Footnotes
References
- Borgman B., Asperen E., Dekker R., (2010), Online rules for container stacking in "OR Spectrum (2010) 32:687–716 DOI 10.1007/s00291-010-0205-4"
- Derhamia S., Smith J. S., Gue K. R., (2016), Optimizing Space Utilization in Block Stacking Warehouses in " International Journal of Production Research"
- Engelmann S., (2012), Advanced Thermoforming: Methods, Machines and Materials, Applications and Automation, Wiley Series on Polymer Engineering and Technology, John Wiley & Sons
- Güven C., Eliiyi D. T., (2014), Trip allocation and stacking policies at a container terminal in "Transportation Research Procedia Volume 3, 2014, Pages 565-573"
- Manoj1 B., Kunjomana A. G., (2012), Study of Stacking Structure of Amorphous Carbon by X-RayDiffraction Technique in "Int. J. Electrochem. Sci., 7 (2012) 3127 - 3134"
- Us Department Of Defense, (2008), AR 740-1 08/26/2008 storage and supply activity operations, United States Government US Army, United States Army, Department of the Army, U. S. Army, Army, DOD, The United States Army
