racking collapse

Racking Collapses in the Cold Storage Industry

Racking Collapses in the Cold Storage Industry

Fortunately the collapse of pallet racking, whether in cold or ambient situations, is very uncommon. However recent experience shows that it can happen, and when it does the results are usually disastrous. At the very least major disruption of operations and serious financial loss from damage to product and equipment; at the worst, injury or even loss of life for personnel. It is not always easy to explain such disasters, but one thing must be clearly understood. Racks do not collapse on their own. Modern racking from reputable suppliers is carefully engineered to perform the task it is specified for. Racks collapse only when compromised by serious overloading beyond its planned function, or from damage caused by carelessness, or misuse. The latter is generally the result of being impacted by handling equipment. Such damage weakens the structure, and although a major impact can sometimes cause immediate collapse, often it is accumulated small impacts that gradually build up until the rack is unable to absorb any further abuse and ‘gives up’. It is critical that drivers report any rack damage as soon as it occurs even if they were the responsible party. There are many dangers to be aware of when operating a pallet-rack-equipped facility. Warehouses and cold-stores are being built higher for cost and operational efficiencies – the norm now being up to 12 metres – and this makes the risks greater, and also the operators’ task more demanding. It is essential that operators are professionally trained – and this includes ongoing refresher courses – but motivated as well. Their eye sight also needs to be checked on a regular basis. They should be reminded constantly of the potential dangers of carelessness; and it is vital to ensure that the demands of the job are made as reasonable as possible. Managers and supervisors need to be aware of the pressures put upon operators by the ‘need for speed’, and also of the difficulties and discomforts of the work environment. This is nowhere more true than in cold-stores where sub-zero temperatures can numb not only the body, but the mind as well. Concentration and reflexes can be measurably impaired in the cold, and it is vital that operators be given the best protection possible. Heated cabs, adequate freezer-wear, etc. will lead to greatly enhanced performance as well as safety. So apart obviously from over-loading, the first vital component of avoiding the danger of racking collapse is preventing damage . . . But the second is being aware of such damage if and when it occurs. Which brings us to rack inspection. This however is a subject all on its own, and deserves a follow-up article in the next issue.

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Pallet Racking Safety

Pallet Racking Safety- Pallet racking, whether mobile or conventionally fixed, supports heavy loads at considerable heights, and the result of accidents can be catastrophic. At the very least costly hardware and product damage, not to mention lost time – at the worst personnel can get hurt or even killed. For these reasons it is vital to adopt and maintain safe practices at all times. The first rule of rack safety is correct usage. Always ensure that the rack is being used for its intended purpose. Clear signage should always indicate vital information about loading capacities, load dimensions, etc. and these must never be exceeded. No alterations to the racking should ever be made without approval from the original supplier. The second rule is simply summed up as operator training. Handling equipment drivers who are not adequately trained, and made fully aware of the potential dangers of carelessness. One aspect that does require attention is the policing and management of forklift drivers. This can only be achieved by managers and supervisors walking around in the stores on a daily basis, and “pulling drivers over” for minor infringements. This will help to prevent major ones at a later date. The picture above illustrates the sort of thing that happens all too often. In a battle between rack and forklift, the rack will always lose – and this typifies the usual result.   This total collapse is fairly extreme; but more insidious – and often not taken sufficient notice of – are frequent on-going minor collisions between forklift and rack. The rack sustains minor damage, often to beams, more usually to the lower sections of the upright, that gradually weakens the structural integrity of the rack. This gradual weakening of the structure can lead to sudden and unprovoked collapse with inevitable results. Which leads us to the third – and possibly most important – rule for rack safety: Regular inspection, and reporting of damages Damage inspections need to become an integral part of daily management in any racked warehouse or store. All personnel need to be aware and involved, with ultimate responsibility delegated to a manager, or at least senior supervisor –  this person in turn reporting regularly to top general management. Noticeable damage to uprights or beams is the obvious problem, but some of the additional points to be looked for are excessively bent beams, missing beam locks, unstable loads, damaged pallets, bad house-keeping, and careless attitudes. Inspection of all racks should be conducted routinely and systematically at least monthly, whereby any and all damage is noted, recorded, and reported to the responsible authority. If any doubt exists regarding the seriousness of the situation, then expert opinion needs to be sought – either from the rack supplier or a professional inspector. New racking (second-hand is a no-go) from a reputable supplier has invariably been carefully designed by qualified engineers to perform the functions required of it – but although safety factors are always built into the design, gross misuse is not anticipated and cannot be factored in. Ultimately rack safety is your responsibility.   Read more – Rack Safety Inspections Read more – Pallet Racking Beam Safety Clips

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What caused this racking to collapse ?

I recently visited a storage facility that had experienced a racking collapse. A whole single fixed rack had come down involving some 120 pallets. Looking at the twisted frames that were piled up outside the store I noticed that the orange load beams had been bolted onto the blue rack frames. Bolting load beams to the frames certainly stops beams from being dislodged when a pallet is lifted too high on removal but it can also be problematical. The spring clips or drop in pins are supplied by racking companies for a reason. They are designed to shear or release when an excessive load is applied to them. This means that, should a frame be hit by a forklift, the load beams on either side of the frame will come down but the collapse may be limited to this area. With bolted beams there is a far greater chance that the whole rack will be pulled over as the bolts will not shear in the same way. I would therefore advise that load beams are not bolted to frames but that the normal chips or drop in pins are used. Where visible these should be checked on a weekly basis by a competent person in the warehouse. We also have Rack Inspection Tools available which can be used to check the condition of the racking after minor impact damage has occured.  Contact Rosie@barpro.co.za or call her (021)552 9190 for more information. James Cunningham  

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