When you hear “mezzanine shelving,” the first thing that comes to mind for many customers is simply higher shelves, a shelf to the ceiling. And in this thought lies the main mistake, which then causes problems with load, access and, ultimately, security. In fact, this is an entire engineering system where every detail - from the thickness of the rack to the type of flooring - is calculated for a specific product, a specific warehouse process, and even for a specific loader. Too often I came across situations where they saved on design, and then were unable to properly operate the second tier.
So, the client wants to increase the useful volume of the warehouse. The area is limited, the ceilings are 10-12 meters - it would seem an ideal candidate for a mezzanine. But the question of the foundation immediately arises. Existing floors are often not designed to withstand additional point loads from racks, especially when it comes to storing pallets of metal or equipment. It is necessary to conduct a study of the load-bearing capacity of the slab - a step that many try to skip, hoping for "maybe". The result is cracks, subsidence and expensive repairs.
Another nuance is technological openings and passages. The upper tier should not turn into a labyrinth where stackers are afraid to enter. The width of the passages, turning radii, the location of the building columns - all this must be superimposed on the shelving arrangement plan. I remember one project near Khimki, where, due to an unaccounted for ventilation shaft, the entire layout had to be redrawn on the fly, losing almost 15% of potential storage locations.
And of course, myselfmezzanine rack. This is not just a set of components. The key is the connection nodes. Cheap solutions often use bolted connections with insufficient contact area, which, under dynamic load from a forklift, leads to loosening of the entire structure. Reliable systems, like those produced by, for example,?Harbin Jusheng Metal Structure Manufacturing Co.,Ltd., rely on reinforced locking connections or a combination of bolts and rivets, which ensures the rigidity of the frame for its entire service life.
The type of beam is a dilemma between price and functionality. Step-beams are cheaper, but they require special coils or shelves. Beams with perforations along the entire length (box-beams) are more versatile; any type of flooring and fencing can be attached to them, but they are also more expensive. If manual selection of small goods is planned on the second tier, then a solid metal flooring or grating is indispensable - people’s safety is paramount. And this is additional weight and, again, a load on the floor.
How to organize a lift? Elevator, lift, stationary staircase? If the lift's lifting capacity is less than the weight of the pallet, it is useless. A gravity lift was installed at one of the food warehouses in Kazan, but they did not take into account the humidity and temperature changes in the workshop. After six months, the rollers turned sour and the mechanism began to jam. I had to change to a more expensive electric version with protection from the environment. This is the case when an attempt to save 300 thousand rubles resulted in losses of a million in downtime and replacement of equipment.
Here it is important to work with a manufacturer who understands the full cycle. Looked at the sitejshj.ru- it is clear thatLLC ?Harbin Jusheng?positions itself precisely as a full-cycle enterprise: from design to service. This is critical for mezzanine systems. Because the finished rack is only half the battle. It still needs to be properly assembled, the levels checked and the staff trained in the rules of working at height.
Installing a mezzanine is not like assembling a store shelf. Precise geodetic control is required to ensure that all racks are strictly vertical and tiers are horizontal. A misalignment of a couple of degrees at a height of 6 meters will cause a significant displacement, and the pallets simply will not fall into place. Assembly by eye? unacceptable.
Fencing is a separate pain. According to the standards, they are mandatory, but customers often ask to “do the minimum?” or even limit yourself to chains. Chains are not fencing. This is an illusion of security. A reliable fence must withstand the impact of a falling piece of cargo or an accidental collision with a forklift. The minimum height is 1100 mm, with intermediate horizontal elements so that a person cannot slip or fall.
And more about forklifts. The operator working on the second tier must have a special permit. The floor on the mezzanine must be cleaned of oil, dust, and there should be no foreign objects on it. Does this seem obvious? In practice, I regularly see wrappers, empty pallets, and tools lying around on work sites. On one occasion this resulted in the forklift running over a thrown wrench, skidding and breaking through a guardrail. Fortunately, there were no casualties. After this incident, strict control over cleanliness on the tiers was introduced at that warehouse.
To store tires or long materials (pipes, profiles), console modules are often used as part of a mezzanine system. Here the load on the cantilever beam and its deflection are critical. Incorrect calculation - and in a year the beams will “sag”, creating the risk of the stack collapsing.
In pharmaceutical or food warehouses, where cleanliness is important, the issue of anti-corrosion coating arises. Standard powder coating may not be sufficient in high humidity or aggressive environments. Requires galvanizing or multi-layer coating. Companies that specialize in the full cycle, like the same Harbin?Jusheng?, having a production area of 20,000 sq. m, they usually offer different coating options, because they have the appropriate technological lines for this.
For warehouses with a seasonal peak load (for example, before the New Year holidays), it is important that the designmezzanine shelvingwas not only durable, but also to a certain extent adaptive. Sometimes it is necessary to temporarily increase the storage height in certain areas. Good systems allow you to do this due to height-adjustable beams and locking connections that do not require complete disassembly of the section.
Implementing a mezzanine system is always a complex task. You can’t just buy shelving from a catalog and install it. We need an audit of the premises, analysis of cargo flows, careful design and responsible installation. Savings at any of these stages will result in many times greater losses in the future.
Working with different suppliers, you see the difference. When a manufacturer such as?Harbin Jusheng Metal Structure Manufacturing Co.,Ltd., declares a full cycle from development to service, these are not just words for the site. This means that they are more likely to be involved at all stages, taking responsibility for the final result. Their factory equipment with automated lines indicates a desire to control quality at the production stage, which is paramount for metal structures.
Therefore, my main advice: considermezzanine rack for warehousenot as a purchase of equipment, but as a project to optimize warehouse space. And choose partners who are capable of being contractors in such a project, and not just hardware sellers. This choice determines not only the efficiency of storage, but also the safety of people, which is ultimately priceless.
