How to Deal with Larger, Bulky Items in Rack Storage

Since overloading is a common source of pallet rack collapses, (in fact misapplication, including capacity issues, is the top cause) it’s important to understand how much weight your rack – not just your beams – can bear.

For a piece of storage equipment that is relatively simple, ensuring that the rack can hold what you want it to hold is sometimes complex – particularly on very heavy loads, or large but not so heavy loads. This article focuses on upright frame capacities. Beam capacities are pretty simple – they’re listed per pair of beams by most rack sellers, and you just adhere to them with your pallet loads. But frame capacity is not as straightforward as a beam capacity…

The first thing to understand is the issue of vertical load spacing. In general, a taller load will stress a rack as much as or more than a squat, heavy one. Fewer beams within a vertical space means less rigidity and a lower weight capacity for the upright. So if you have a 24′ frame and a very tall load that only allows 2 or 3 beam levels, frame capacity is diminished. Adding beams adds strength to the entire structure. Typically, any tall load (say, above 42″ high) requires additional work to ensure the rack structure can bear the weight. Rack frames, unlike beams, are rated per frame, not per pair.
Capacities do not include the weight of the rack system itself. Deduct the weight of frames, beams, decking and accessories from your overall capacity. Typically these will be a relatively minor amount of weight in the scope of the rack load.

Column strength is comprised of 3 key elements:

Decimal steel thickness (gauge),
Yield thickness, and
Sectional dimensions.
Steel gauge is actually a range of steel thickness, not a fixed number. Manufacturers refer to the gauge of their racking or shelving, and it’s a valid number, but it isn’t always the bottom line in terms of capacity. It is important (more steel tends to equal higher capacity, or at least more durability) but it isn’t the only factor.

Metal gauges are like golf: lower is better. Example: 14-gauge = .0677″ to .0817″, while 15-gauge = .0613″ to .0733″. And it’s not an exact science, either-steel gauges can vary by up to 18 percent. Capacity based upon a specific thickness dimension is generally managed by taking the lower end of the ratings, so manufacturers tend to understate the actual capacity of a piece of metal when gauge is a limiting factor.

Yield strength is a matter of metal quality. The better the steel, the higher the capacity, the better impact resistance and durability. Steel King, for instance, manufactures its SK2000 racks with 55,000 PSI steel. You’ll find a range of racks built with 50,000 PSI. Generally you do not have to worry about the yield strength of your racks, but the better racks are built with better steel.
Sectional Thickness: A closed tube has a greater area than an open one, so it will generally bear more weight. Rack uprights made of closed tubing are inherently stronger than those with open backs. There is more steel involved, and it also helps racks made this way resist impacts better. Tubular posts have 44 times more torsional strength (resistance to twisting forces) than open back posts. Using closed tubing on columns, braces, and beams can result in a much stronger rack.
Uprights consist of columns and bracing. The bracing can also have an effect on the upright capacity. There are 3 primary types of upright frame bracing: C-shape sheet metal, C-shape sheet metal with return flanges, and closed tubular steel. The advantages of tubular columns also apply to bracing.

Light Duty Racking

Light duty racking has the advantages of simple structure, pleasing in appearance and being easy to install and demolish. The height of each beam is easy to adjust freely by a pitch of 50mm. Each level will load up to 150kg under the condition of the uniform force. The surface of the light duty racking adapts the electrostatic and this approach makes it anti-corrosion and anti-rust. These racks are mainly used in supermarket, warehouse of the enterprise and some other institutions.

Cantilever Racking

Cantilever rack is mainly used for the storage of materials with long shape, such as rolled section steel, tubes, plates etc. uprights of a cantilever rack usually adapt the H-shaped steel or Cold-rolled steel. Loads maybe handled manually when they are lightweight or by using lift trucks or other appropriate lifting systems when heavy items are involved. The height of the shelf is usually under the 2.5 meters (if use the forklift, the height will reach to 6 meters.) The length of the arms is under 1.5metres, and each arm loads within 1000kg. Cantilever racings are mainly used in the field of machinery manufacturing and building material markets.

Platform Racking (2)

Platform racking usually uses medium-type shelf or heavy shelf-type racking as the support of the main body and the floor panels. Floor panels usually select the cold-rolled steel slab, the pattern of steel slab or steel grating floor. But recent years,it is popular to use cold-rolled steel slab. This steel slab has lots of advantages, such as strong load-bearing capacity, good overall performance, high accuracy, smooth surface and easy to control etc.

Guide to Storage Racks

Industrial storage racks are the cornerstone of any warehouse or distribution center system. With the right warehouse racks, pallet racks and shelving racks, you can ensure the safety of your products, facilitate storage and retrieval needs, increase efficiency, improve inventory tracking and lower your overall storage costs. Proper storage equipment also helps keep your employees safe when storing, retrieving or moving materials and merchandise.

When shopping for warehouse racks, keep the following in mind:

1. The size and weight of the items you’ll be storing on your storage racks.
2. The length of time items will be stored on the warehouse racks.
3. The configuration of industrial storage racks and how they will fit within your space.

Platform Racking(1)

Platform racking system refers to a rack that is built on the base of the existing workplace. To make full use of available space and meet actual demands, platform can be flexibly designed into one layer or multiple layers based on the design specifications of steel structures. It consists of medium-type shelf or heavy shelf-type rocking, and it is easy to access a number of light foam and small and medium-sized pieces of goods. The goods will be carried to the second floor or the third floor of a platform racking by a forklift, snorkels or ladders, and with the light vehicle or hydraulic pallet truck, the goods can be sent to designated locations.

Mecalux is Rising

Spanish storage and pallet racking systems provider Mecalux completed its $30 million purchase of the UFI/Interlake assets last month, which include plants in Pontiac, Ill.; Sumter, SC; Mexicali and Matamoros, Mexico.

The company has changed its American division name to Interlake Mecalux, Inc. Representatives said this is a market opportunity that means growing its presence in North America further enhancing their global expansion plan. Mecalux will acquire the UFI/Interlake client base, which includes some of the largest companies in the U.S.

Choose the Best Pallet for Your Pallet Racking

To determine pallet capacity limitations, it is important to understand the different pallet racking types available, the orientation of the pallet in the rack and how the pallet will be supported. Keep these rack specifications in mind, whether you’re shopping for pallets or for rack:

Edge Rackable (Unsupported) - When racked, the pallet gets support only on two edges of the pallet with no central support. This could be a drive-in pallet racking or a standard/structural rack with no center support; different capacities apply, depending on the rails and orientation of the pallet in the rack. Only select pallets are suitable for this true edge-rack storage.

Standard Rack (Partially Supported) - When racked, the pallet gets support on the front and back edge, as well as central support from a 2″ x 4″ wood plank or other support positioned perpendicular to the rails.

Not Rackable (Full Support) – Lightweight and medium-duty pallets are designed only for floor loading or to stack on other pallets. These pallets are not recommended for racking unless the pallet racking system is fully supported by wire/mesh or other decking to provide equivalent support the pallet would receive on the floor.

About Hengxin

Nanjing Hengxin Storage Equipment Manufacturing Co., Ltd. ,locating in Nanjing,
quite near to Shanghai, is a comprehensive enterprise engaged in design, manufacturing, installation and consultation of logistics systems and material handling equipments. Our main products are pallet racking, medium duty racking, cantilever racks, mezzanine shelving, plat forms, etc.

Strictly adhering to the requirements of ISO 9001:2000 certificate and thoroughly pursuing advanced international models of management, Hengxin is on its way to become the leading Chinese business in the industry.

As one of the leading racking system supplier of China, Hengxin is ceaselessly integrating new ideas, perspectives and technologies, at the same time, we are trying to build the brand “Hengxin” with the objective of integrated comprehensive systems of logistics.

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