What is Push-Back Racking System?
What is Push-Back Racking System?
What is Push-Back Racking System?
The push-back rack system is a dense storage solution where pallets are stored one behind the other according to the LIFO principle. It saves space by reducing the need for aisles. It is especially used in warehouses where there is high stock of the same product and there is no FIFO requirement.
What is a push-back rack system, how does it work, and in which warehouses is it used? Learn about the LIFO principle, its types, parts, and load capacity criteria.
The push-back rack system is a dense storage solution where pallets are stored one behind the other according to the LIFO principle. It saves space by reducing the need for aisles. It is especially used in warehouses where there is high stock of the same product and there is no FIFO requirement.
A push-back racking system is a high-density storage system that enables palletized products to be stored deeply on inclined rails, carrier carts, or rollers. Known in English as "push-back racking", this system is used to stack more pallets in limited warehouse space.
The system works on the LIFO principle. That is, the last pallet entering the rack is the first to be retrieved during exit. For this reason, the push-back racking system is designed for operations where many pallets of the same product group are stored and there is no strict FIFO requirement.
Compared to the classic selective pallet racking system, it offers a higher pallet capacity in the same area because a separate access aisle is not required for each pallet. Pallets are positioned one after another within a single lane, and loading-unloading operations are carried out from the same aisle.
This structure aims to allocate a larger portion of the warehouse area to storage capacity. The efficient operation of the system depends on its correct design according to product type, pallet weight, and stock rotation speed.
How Does a Push-Back Racking System Work?
The push-back racking system works on the principles of slope and gravity. The forklift places the first pallet at the front section of the rack lane. When the second pallet is loaded, it pushes the front pallet backward. Each new pallet moves the previous pallet to the rear of the lane.
During unloading, when the frontmost pallet is retrieved, the pallet behind it moves forward and the next pallet is picked up by the forklift. There is no need for the forklift to enter into the rack lane.
The basic operating characteristics of the system are as follows:
Loading and unloading are done from the same aisle.
Pallets are stored one after another within the lane.
The system works on the last-in, first-out (LIFO) logic.
The forklift does not enter inside the rack.
Pallet movement is provided by a rail, roller, or cart mechanism.
Pallet flow depends on the slope adjustment and the condition of the carrier parts. Correct calculation of the slope and regular inspection of the rails, carts, and rollers are necessary for the smooth forward movement of the pallets.
At this point, there is an important difference with pallet flow racking. Pallet flow racking generally works with FIFO logic, and loading-unloading is done from two different faces. In the push-back racking system, since the entire process takes place from a single face, the flow is in LIFO order.
What Are the Types of Push-Back Racking Systems?
The push-back racking system is divided into different types according to the carrier mechanism used. Three main types stand out:
Cart system: It works with nested carrier carts. As a new pallet is loaded, the previous pallet moves backward. It provides a more controlled movement for heavy pallets.
Roller system: Pallets move on inclined roller lines. It is used in shallower depths and standard palletized warehouses.
Slide system: The carrier structure is designed according to the product and pallet type. It can adapt to different pallet types.
Lane depth is generally planned between 2 and 6 pallets. Deeper systems increase storage density while reducing access flexibility. Therefore, when making a choice, product variety, stock rotation speed, and pallet weight are evaluated together.
What Parts Does a Push-Back Racking System Consist Of?
The push-back racking system consists of a combination of static rack components and mobile carrier mechanisms. Therefore, both load capacity and the compatibility of moving parts are planned together.
The main parts of the system are as follows:
Uprights and frames
Beams
Inclined rails
Carrier carts or rollers
Stoppers
Connectors and safety pins
Base plates and anchors
Upright protectors and barriers
Uprights and frames form the main load-bearing structure. Rails and carts provide the movement of the pallets. Stoppers prevent the pallet from exiting into the aisle in an uncontrolled manner. Upright protectors and barriers protect the rack against forklift collisions.
Moving parts are important for the continuity of the system. Regular inspection of rails, carts, and stoppers helps maintain healthy pallet movement.
What Are the Dimensions and Load Capacity of a Push-Back Racking System?
The dimensions of a push-back racking system are not fixed; they are designed according to the warehouse structure and product characteristics. Pallet size, product weight, lane depth, rack height, forklift access, and floor condition are evaluated together in the capacity calculation.
In general applications, lane depth varies between 2 and 6 pallets. Load capacity per pallet can be in the range of 1,000 kg to 1,500 kg in most projects. For heavier loads, special profile, rail, and connection calculations are made.
The main criteria affecting dimensions and capacity are:
Pallet size and pallet type
Product weight per pallet
Rack height and number of levels
Lane depth
Rail inclination angle
Forklift type and lifting capacity
Load-bearing condition of the warehouse floor
Rail slope is decisive for system performance. When the slope is low, pallets do not move forward; when it is high, movement accelerates; therefore, the slope angle is determined by technical calculation. The system is designed after site exploration and technical calculation.
What Are the Advantages of a Push-Back Racking System?
The push-back racking system offers high storage density combined with single-aisle access. Its prominent features are:
It provides the opportunity to store more pallets in the same area.
It uses warehouse volume more efficiently by reducing the number of aisles.
Compared to the drive-in racking system, where the forklift enters into the lane, in the push-back system the forklift does not enter inside the rack.
Loading and unloading are done from a single aisle.
It provides fast access to pallets in high-volume stocks of the same SKU.
The system operates in LIFO order; therefore, it is suitable for operations with high stocks of the same product where individual access to each pallet is not required. For products that require FIFO tracking, pallet flow racking can be evaluated, and for warehouses requiring higher density and automation, solutions like the shuttle racking system can be considered.
Where is a Push-Back Racking System Used?
The push-back racking system is used in warehouses where many pallets of the same product are stored and there is no strict FIFO requirement. It is suitable for businesses where pallet circulation is concentrated on certain products and space is limited.
Common usage areas are:
Food and beverage warehouses
Cold storage warehouses
Frozen product facilities
Buffer stock areas of production facilities
Raw material warehouses
Packaging and packing warehouses
Retail distribution centers
A push-back racking system can be preferred in cold storage warehouses. Since square meter costs and energy consumption are high in these areas, storing more pallets with fewer aisles helps in using the cooled volume efficiently.
For warehouses with high product variety, where individual access to each pallet is required, or where order-based picking is done, a very narrow aisle racking system or standard pallet racks may be more suitable. The correct choice is made by evaluating warehouse space, product rotation, and access needs together.
A push-back racking system is a high-density storage system that enables palletized products to be stored deeply on inclined rails, carrier carts, or rollers. Known in English as "push-back racking", this system is used to stack more pallets in limited warehouse space.
The system works on the LIFO principle. That is, the last pallet entering the rack is the first to be retrieved during exit. For this reason, the push-back racking system is designed for operations where many pallets of the same product group are stored and there is no strict FIFO requirement.
Compared to the classic selective pallet racking system, it offers a higher pallet capacity in the same area because a separate access aisle is not required for each pallet. Pallets are positioned one after another within a single lane, and loading-unloading operations are carried out from the same aisle.
This structure aims to allocate a larger portion of the warehouse area to storage capacity. The efficient operation of the system depends on its correct design according to product type, pallet weight, and stock rotation speed.
How Does a Push-Back Racking System Work?
The push-back racking system works on the principles of slope and gravity. The forklift places the first pallet at the front section of the rack lane. When the second pallet is loaded, it pushes the front pallet backward. Each new pallet moves the previous pallet to the rear of the lane.
During unloading, when the frontmost pallet is retrieved, the pallet behind it moves forward and the next pallet is picked up by the forklift. There is no need for the forklift to enter into the rack lane.
The basic operating characteristics of the system are as follows:
Loading and unloading are done from the same aisle.
Pallets are stored one after another within the lane.
The system works on the last-in, first-out (LIFO) logic.
The forklift does not enter inside the rack.
Pallet movement is provided by a rail, roller, or cart mechanism.
Pallet flow depends on the slope adjustment and the condition of the carrier parts. Correct calculation of the slope and regular inspection of the rails, carts, and rollers are necessary for the smooth forward movement of the pallets.
At this point, there is an important difference with pallet flow racking. Pallet flow racking generally works with FIFO logic, and loading-unloading is done from two different faces. In the push-back racking system, since the entire process takes place from a single face, the flow is in LIFO order.
What Are the Types of Push-Back Racking Systems?
The push-back racking system is divided into different types according to the carrier mechanism used. Three main types stand out:
Cart system: It works with nested carrier carts. As a new pallet is loaded, the previous pallet moves backward. It provides a more controlled movement for heavy pallets.
Roller system: Pallets move on inclined roller lines. It is used in shallower depths and standard palletized warehouses.
Slide system: The carrier structure is designed according to the product and pallet type. It can adapt to different pallet types.
Lane depth is generally planned between 2 and 6 pallets. Deeper systems increase storage density while reducing access flexibility. Therefore, when making a choice, product variety, stock rotation speed, and pallet weight are evaluated together.
What Parts Does a Push-Back Racking System Consist Of?
The push-back racking system consists of a combination of static rack components and mobile carrier mechanisms. Therefore, both load capacity and the compatibility of moving parts are planned together.
The main parts of the system are as follows:
Uprights and frames
Beams
Inclined rails
Carrier carts or rollers
Stoppers
Connectors and safety pins
Base plates and anchors
Upright protectors and barriers
Uprights and frames form the main load-bearing structure. Rails and carts provide the movement of the pallets. Stoppers prevent the pallet from exiting into the aisle in an uncontrolled manner. Upright protectors and barriers protect the rack against forklift collisions.
Moving parts are important for the continuity of the system. Regular inspection of rails, carts, and stoppers helps maintain healthy pallet movement.
What Are the Dimensions and Load Capacity of a Push-Back Racking System?
The dimensions of a push-back racking system are not fixed; they are designed according to the warehouse structure and product characteristics. Pallet size, product weight, lane depth, rack height, forklift access, and floor condition are evaluated together in the capacity calculation.
In general applications, lane depth varies between 2 and 6 pallets. Load capacity per pallet can be in the range of 1,000 kg to 1,500 kg in most projects. For heavier loads, special profile, rail, and connection calculations are made.
The main criteria affecting dimensions and capacity are:
Pallet size and pallet type
Product weight per pallet
Rack height and number of levels
Lane depth
Rail inclination angle
Forklift type and lifting capacity
Load-bearing condition of the warehouse floor
Rail slope is decisive for system performance. When the slope is low, pallets do not move forward; when it is high, movement accelerates; therefore, the slope angle is determined by technical calculation. The system is designed after site exploration and technical calculation.
What Are the Advantages of a Push-Back Racking System?
The push-back racking system offers high storage density combined with single-aisle access. Its prominent features are:
It provides the opportunity to store more pallets in the same area.
It uses warehouse volume more efficiently by reducing the number of aisles.
Compared to the drive-in racking system, where the forklift enters into the lane, in the push-back system the forklift does not enter inside the rack.
Loading and unloading are done from a single aisle.
It provides fast access to pallets in high-volume stocks of the same SKU.
The system operates in LIFO order; therefore, it is suitable for operations with high stocks of the same product where individual access to each pallet is not required. For products that require FIFO tracking, pallet flow racking can be evaluated, and for warehouses requiring higher density and automation, solutions like the shuttle racking system can be considered.
Where is a Push-Back Racking System Used?
The push-back racking system is used in warehouses where many pallets of the same product are stored and there is no strict FIFO requirement. It is suitable for businesses where pallet circulation is concentrated on certain products and space is limited.
Common usage areas are:
Food and beverage warehouses
Cold storage warehouses
Frozen product facilities
Buffer stock areas of production facilities
Raw material warehouses
Packaging and packing warehouses
Retail distribution centers
A push-back racking system can be preferred in cold storage warehouses. Since square meter costs and energy consumption are high in these areas, storing more pallets with fewer aisles helps in using the cooled volume efficiently.
For warehouses with high product variety, where individual access to each pallet is required, or where order-based picking is done, a very narrow aisle racking system or standard pallet racks may be more suitable. The correct choice is made by evaluating warehouse space, product rotation, and access needs together.
Frequently Asked Questions (FAQ) About Push Back Racking System
Frequently Asked Questions (FAQ) About Push Back Racking System
Frequently Asked Questions (FAQ) About Push Back Racking System
Can Push-Back Rack Systems Be Used in Cold Storage?
Yes, the push-back rack system can be used in cold storage. Since it provides high storage density, it helps to use the volume more efficiently in areas with high energy costs.
Can a FIFO Order Be Achieved in a Push-Back Rack System?
Can the Push-Back Rack System Be Retrofitted to an Existing Warehouse?
Is Pallet Size Important in the Push-Back Rack System?
Is the Maintenance of the Push-Back Racking System Difficult?
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