Dense Storage Systems

Selective, single-deep Pallet Racks are the most common types of Rack on the Market. They are the most cost effective and efficient for the majority of businesses. Selective allows for easy access to all pallets and product doesn't get hidden or buried. With some product types or space limitations, a dense storage system is required.

The three most common dense storage systems are Drive-In, Push Back and Pallet Flow Systems. Each system is very effective at achieving the goal of storing significantly more pallet in a given area. We will discuss the pros and cons of all three to help you pick a system that is not only efficient and safe, but cost effective and tailored to your unique "standard operating procedures".


Drive-In Pallet Rack is a highly specialized type of pallet rack meant for high density storage. Drive-In pallet racks are used to store multiple pallets of the same item where pallet selectivity or time sensitivity is not an issue. Drive-In pallet rack is named such because the lift truck actually enters, or drives into, the rack structure. The rack structure is specifically design to accept your lift trucks as well your products for storage.

  • Most cost effective of the three dense storage systems
  • Designed to fit your warehouse forklift restrictions
  • Must enter storage system - possibility of damage to frames.
  • LIFO (last in, first out) - difficult to rotate stock


Push-Back Rack is designed for high-density, multiple-product storage situations, combining excellent selectivity and a maintenance-free design. This versatile system uses nesting carriages to store pallets up to five deep, providing multiple pick facing with extremely high throughput.

As each pallet is loaded, it's placed on a free-rolling carriage that is pushed back into the system by loading additional pallets. When unloading, gravity moves the pallets forward to the aisle on the telescoping carriages, eliminating the need for reaching or driving into the rack.

  • Allows for efficient use of space with limited sacrifice to product access
  • Provides the best combination of selectivity and storage density
  • Years of maintenance free operation
  • Cart/Rails are built on an angle - loss of storage space
  • Subject to carts getting blocked or dislodged


Pallet Flow Systems fully utilize the available storage space while ensuring the faces along the picking aisle remain regularly stocked. In this first-in/first-out (FIFO) system, pallets are loaded at the top end of the slightly inclined rack and glide safely and effortlessly at a controlled pace to the other side.

These heavy-duty systems are designed for years of trouble-free operation with rugged load-bearing wheels. Inventory turnover is quick and efficient, whether merchandise is moved strictly on pallets or as part of an order picking system.

  • Ideal for material with expiration dates
  • Produces a solid volume of usable storage space
  • Provides savings in space, manpower and utilities
  • Allows for multiple pallet types and different products in designated lanes
  • Can be up to 10 deep

All three types are widely used and do a very good job at what they are intended to do. Russell Industries handles all 3 in New and Used and are installation experts of these types of systems. Call either location, Houston or Irving,TX, to speak with an experienced sales representative so we can find the correct solution for your dense storage requirements.