Pallets

Mobile Racking in Dry Goods & Ambient Warehouses

Mobile Racking in Dry Goods & Ambient Warehouses – Storax mobile racking has long established itself as a popular option – indeed the system of choice – for high-density storage efficiency, with well over 250 installations in the last 20 years in SA alone. Most of these have been in Cold and Freezer Store applications – quite logically since this is the most expensive type of facility to both build, maintain, and run, meaning that maximum usage of volume is vital. However, it is a commonly held belief that the concept will not work in general warehousing situations, such as fast moving consumer goods (FMCG), since it is not ‘fast enough’. Unfortunately this is a view held by many of our local suppliers. This is often – though obviously not always – a misconception. Admittedly the average FMCG warehouse moves product in and out at a far greater pace than the normal freezer store, but the argument is also used that mobile racks do not lend themselves to simultaneous order picking. This second contention should not even be a consideration, since although many operators have pallet handling and picking happening in the same access aisle, this is not simply bad practice but, in most countries, strictly illegal in terms of safety legislation. The contention that the racks will not move fast enough to create the aisles where needed is very simply overcome by intelligent warehouse management whereby WM communicates with the RT operator to inform him of his route, and using his cab-mounted RF remote control he is able to ensure the correct aisle is open pretty much by the time he gets there. As far as pallet load handling is concerned, consider this: The product throughput speed (in and out) of the warehouse is governed by many issues, but is ultimately limited by the number of reach-trucks in operation. Accordingly the warehouse operator will use the number of RTs that his throughput demands. If he needs two machines working constantly, why have more than two aisles? All others are just wasted space that could be utilised for additional capacity. Imagine a typical warehouse with palletised goods on racking 6 or 7 high, with 12 runs of racking. He needs only 2 machines to handle the throughput, but has 11 aisles permanently open. If this racking was mobile, split up as 2 banks of 6 with only two movable aisles opening as and where needed for access, he would reduce the space needed for racking by up to 50%. Alternatively he could store nearly double the quantity of product in the same area. Say two banks of 12 runs with two moving aisles. If he needs 3 RTs, the layout will be designed accordingly with perhaps 3 banks of 8 runs with 3 aisles; or for 4 machines 4 banks of 6 with 4 aisles. Obviously this is an over-simplification, and there are definite limits to this argument, but the principle holds. There are many other, perfectly good, systems available for high-density pallet storage, including our own Ranger RF shuttle, but only Storax mobiles enable full selective access to any pallet in the whole system at any time. Discuss your needs with Barpro before making expensive decisions, perhaps based on not being fully informed about the full range of possibilities, and we’ll use our extensive experience to advise on all aspects of your new facility, from the earliest planning stages through to completion.

Mobile Racking in Dry Goods & Ambient Warehouses Read More »

Not all pallets can be safely stored on pallet racking

Not all pallets can be safely stored on pallet racking

The wooden base may be designed for horizontal movement, a primary example being the disposable pallet. While it can be of a 1000mm x 1200mm four way entry bottom perimeter slat design, the slats and blocks may not be designed to take the point loads that arise when the pallet is stored on racking load beams. Wooden pallet bases can be designed for storage on racking in a particular orientation. The pallet’s gross weight may exceed the loading for which the rack is designed. Certain frozen products such as plate frozen squid and MDM (mechanically deboned meat) can have a gross weights which exceed what the pallet height suggests.   The product stack can exceed the dimensions of the wooden base. Even small product overlaps are dangerous as they reduce the gaps between the pallet and the frames. This can result in boxes being pulled off pallets as they are being put away or retrieved. Rack frames which are in contact with pallet loads will be pushed or pulled by the forklift during the put away or retrieval process. At high level the forces exerted on the rack frames can be considerable. Pallets with missing slats or blocks will not sit safely on racking beams. The dangers of a falling pallet load are obvious. Removing a jammed but broken wooden pallet at high level is extremely dangerous as it cannot be lifted out with a reach truck forks and the product must be removed manually. Tall pallets, especially high cube fruit pallets, although normally well stowed with disposable corner protection, can develop a “lean” during local transport. Any amount of lean effectively widens the pallet. Pallet lean should be corrected either in a pallet invertor or manually before being placed in racking. Attempting to straighten the pallet by using the forklift’s side shift and the rack frame is not a good idea. Plastic pallets, although they can look exactly the same as wooden ones, have different characteristics, even with non- slip corner pads. If the pads are still in place, plastic pallets can still slip off load beams. In freezer applications they can become brittle especially if stowed with the 1000mm side facing the access aisle. Pallets vary in height and may require the rack load beams to be moved either upwards or downwards to make best use of space. This should not be done without first consulting the rack supplier as the weight that the racking can safely carry is related to the position of the load beams in the frame height. It is in the nature of the storage and logistics industry that unit loads will change. Sometimes it’s obvious as with increased pallet height and sometimes it isn’t as with the wooden pallet base design. Warehouse managers need to check all new pallet types and loads to make sure they can be safely stored in their existing racking.   If a problem is identified, speak to us on 021 552 9190 or your rack supplier, as there are a number of solutions available, including pallet support beams and either mesh or wooden decks. Barpro Storage SA – info@barpro.co.za  

Not all pallets can be safely stored on pallet racking Read More »