racking cape town

Shreeprop opens new cold store

Shreeprop in Durban opens their new cold store

When Shree Property Holdings, Durban’s largest property developers, finalized the upgrade plan for their existing cold storage premises, Shree Cold Storage, at 328 Sydney Road it was already November 2017. The plan was to install Storax mobiles with over 5000 hi-cube pallets capacity in time for the citrus season starting in April 2018. As Craiglen Naidoo, Shree Property Holdings Managing Director, said, “The oranges aren’t going to wait on the trees so Barpro had better be finished on time.”   After Shree Property Holdings had removed the existing concrete floor, Pierre Joubert of Chris Howes Construction was able to lay the concrete rail support plinths before the Christmas break.   The Storax rails arrived in early January and were installed immediately allowing Chris Howes Construction to fit the rebar and pour the floor slab.   Focus then turned to the Storax bases and racking. The electrical control system was made by Barpro Storage at their premises in Cape Town to save time. The racking, designed to take 1500kgs per pallet with frames designed for the increased loading of a future 4th level were sourced directly from Ramada’s factory in Ovar, Portugal and dispatched with the base components on a per mobile bank basis so that the six mobile banks could be completed individually as the materials arrived on an almost weekly basis.   That, at any rate, was the plan and the Ramada Storax Logistics Department did everything to make it happen. But even the best laid plans of mice and men…. Materials for the first bank left Signes, the Lisbon Container terminal, on schedule, but then a series of storms hit Portugal’s exposed Atlantic coast including the infamous “Beast from the East,” shutting down Portugal’s harbors for the best part of three weeks. The confusion and buildup of containers was horrendous and the shipping lines were overwhelmed.     We still don’t know how they did it, but Ramada Storax’s Logistics Department had Shree Cold Storage’s containers on the first shipment out of Signes and then on all subsequent vessels, until everything was on the water.   On arrival in Durban, Linmar Shipping, aided by Shree Cold Storage, got the containers released and delivered to 328 Sydney Road in record time, often in 3 to 4 days rather than the budgeted 10, allowing Bruce Stott of Racking and Shelving Specialists to fabricate the frames and install the racking on the Barpro installed bases. But it was still touch and go. As the first room was completed, the citrus pallets were already arriving and the second room was finished literally in a,” just in time”, basis. As James Cunningham, Barpro’s MD said, “It was a close run thing, but we got it done because of great global teamwork. My sincere thanks to all involved.”   Contact Barpro Storage SA – South Africa’s trusted storage solutions supplier [gravityform id=”10″ title=”true” description=”true”]   Read more: Sequence Logistics expands to Johannesburg Read more: The Strength of Continuity Read more: Stellenpak’s experience with Storax Mobiles

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mobile bases length

How long should mobile bases be?

What kind of weights can mobile bases carry? These are some of the questions we get asked continuously by customers when designing mobile racking systems. With reach-trucks now lifting to heights in excess of 12 m and pallet weights increasing to 1.3 tons mobile racking systems are now being designed to 6 and even sometimes 7 levels high. These factors place extra demands on mobile racking systems and more so on long mobiles than short ones. So let’s take a 6 pallet level high system with 3 pallets between up rights (1m side facing). This equates to 18 pallets on a single side and 36 on the double and at 1.2 ton per pallet its 43 tons per bay. Multiply that by 10 bays and you’re already at 430 tons and about 35m long at 3.5m upright centres. What else weighs 430 tons? A boeing 747-8 fully loaded weighs 433 tons. At Barpro / STORAX our mobiles are designed to handle up to 400 tons per mobile and a maximum of 10 or 11 bays long. Should there be a need for longer mobiles due to warehouse configuration Barpro splits the mobiles in 2 halves and harmonizes them to run end to end in tandem. Why do we do it this way? The benefits of this approach are increased life time of the mobiles, decreased down time and lower maintenance costs over the long term. In theory long mobiles should operate as affectively as short mobiles but the operating environment affects mobile racking performance and has to be taken into consideration. housekeeping may not be ideal loading of the mobile base may be uneven fork lift impacts do occur and maintenance may not be ideal floor settlement Each of these factors places increased demand on the mobile base. The impact is greater for longer mobile bases. A longer mobile base carries more weight and it has more drive power, so the stresses on the mobile base structure are greater. What are some of the results? Jams occur when housekeeping is not done properly and debris gets wedged under the wheel units. Repeated or prolonged jamming causes distortion of the mobile bases, fixings are loosened as bolts are smaller than bolt holes and wheel units become misaligned and don’t travel in line with the rails. This puts extra stress on the guide wheels as friction build up between guide wheel and guide rails and places additional stress on mobiles. More so on long mobiles than short ones.   A mobile base that is not running parallel to the rails is likely to reduce the available aisle width for the fork trucks. A long mobile base will tend to reduce the aisle width more than a short mobile base. Increased wear and stress of the mobile base can also be caused by uneven loading of the mobiles. I.e. more or heavier pallets been loaded at one end. This affect is negligible on short mobiles but can be significant on long ones. Even the most careful sites suffer from some damage, and planned maintenance can be delayed or missed. The effect can only be to add to the burden on a mobile rack. If a problem results in a section of mobile base dragging, then a long mobile base will be more severely affected than a short base. Misalignment of photoelectric cells on long mobile bases is possible if mobiles bow (bend) in the middle. This can cause safety concerns. Furthermore, if the leading edge of the mobile base is convex (bowing outwards), then there is also a risk that the straight line between transmitter and receiver units will lie underneath the base behind the leading edge, which means it may not detect objects in the closing aisle. Differential floor settlement affects rail levels. A mobile rack will gravitate towards the lowest point, wherever it is. The guide rail system will restrain the mobile rack. However there will be increased side thrust, as the flanges of the guide wheels rub more heavily on the sides of the guide rail. This sets up the drag on the mobile base and as above, a long mobile base will suffer greater force and greater drag than a short mobile base. A further advantage of a split mobile base is that it allows the floor designer to use smaller floor slabs, since he can include a movement joint along the line of the split in the mobile bases. This results in a floor that is easier to construct, leading to a potential saving on floor cost. Some of the design features that STORAX has introduced to increase the reliability and longevity of our mobile racking Direct geared drive, from motor to drive wheel. There are usually more drive motors per mobile base with direct drive when compared to a shaft drive system. Consequently, a problem with one drive is less detrimental to a STORAX mobile base. A complete wheel unit fabrication on all wheel units. The wheel unit is the principal structural member on the mobile base. STORAX wheel units are all single piece fabrications. This results in a more rigid base structure, compared to a base where wheel units are split into two halves. Side members. STORAX bases have side members. These are distinct from load carrying bottom beams (orange) and add extra strength to the base structure. Diamond pattern bracing. The diamond pattern bracing is stronger and more rigid than cross pattern bracing, owing to its 4 short members, compared to the 2 longer members that are used in cross bracing. The bracings are strong hot rolled angle profiles. Each side member/wheel unit connection is dowel pinned on assembly at the joints and ends. Unlike a bolt, a dowel is a dead fit and this prevents the mobile base from stretching. Barpro has in excess of 250 systems in Southern Africa that have stood the test of time over a 25 year period. We design our systems to maximise storage capacity, equipment up time and

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