The Complete Guide to Pallet Racking Systems: Types, Configurations, and What to Consider Before You Buy

Pallet racking isn't one-size-fits-all. The system that works for a food distribution warehouse running FIFO inventory rotation is completely different from the one you'd put in a manufacturing facility storing long steel beams. Yet we see buyers make the same mistake over and over: they price out "pallet racking" as if it's a commodity without understanding the configuration options that determine whether the system actually solves their problem.

The Major Racking Types

Selective Racking

Selective racking is the most common system in warehouses, and for good reason. Every pallet position is directly accessible from the aisle, which means no shuffling inventory around to reach what you need. The trade-off is that selective racking uses more floor space than high-density alternatives because you need an aisle for every row.

The standard configuration uses upright frames (the vertical columns) and step beams or channel beams (the horizontal load-bearing members that hold the pallets). Frames come in various heights — 8-foot, 12-foot, 16-foot, 20-foot, and taller — and depths typically range from 36 inches to 48 inches depending on your pallet size.

Best for: Operations that need access to every SKU at all times, high-turnover facilities, mixed-product warehouses.

Drive-In / Drive-Through Racking

Drive-in racking lets forklifts drive directly into the rack structure to place and retrieve pallets. Instead of one pallet deep (like selective), you might store pallets five, six, or even ten deep. This dramatically increases your storage density but limits accessibility — you're working on a last-in, first-out (LIFO) basis with drive-in, or first-in, first-out (FIFO) with drive-through (which has openings on both ends).

Best for: High-volume, low-SKU operations. Think cold storage facilities or seasonal product staging where you're storing large quantities of the same item.

Cantilever Racking

Cantilever systems use arms extending from vertical columns instead of horizontal beams, creating unobstructed storage for long, bulky, or irregularly shaped items. Lumber yards, steel service centers, plumbing supply houses, and furniture warehouses rely on cantilever racking because standard pallet racking simply can't accommodate their products.

Arms are rated by capacity (typically 500 to 3,000+ pounds per arm) and come in various lengths. The column spacing and arm length determine your storage configuration.

Best for: Lumber, pipe, steel bar stock, furniture, carpet rolls, or anything that doesn't fit neatly on a standard 48×40 pallet.

Push-Back Racking

Push-back systems use a series of nested carts on inclined rails. When you place a new pallet, it pushes the existing pallets back along the rail. When you remove the front pallet, the ones behind it roll forward by gravity. Most push-back systems are two to six pallets deep.

This is a middle ground between selective (full accessibility) and drive-in (maximum density). You get higher density than selective without the LIFO constraints being as extreme as drive-in, since each level operates independently.

Best for: Operations that need higher density than selective but can't commit to single-SKU lanes like drive-in.

The Components That Matter

Upright Frames

Frames are the vertical structure of your racking. The key specs are height, depth, gauge (steel thickness), and capacity. A common mistake is underspecifying frames based on your current needs without accounting for future expansion. If you think you might add beam levels later, make sure the frame capacity supports it.

In California specifically, frame selection is tied to seismic requirements. Your frames need to be rated for the seismic zone your facility sits in, and the connection points between frames and beams need to meet those load ratings under lateral force — not just static vertical load.

Beams

Step beams and channel beams span between upright frames and support the pallets. The beam profile, length, and gauge determine the load capacity per pair. Standard beam lengths run from 72 inches (two pallets wide) to 144 inches (four pallets wide), with 96-inch (three pallets wide) being extremely common.

Beam capacity is always rated per pair — so a beam pair rated at 5,000 pounds means you can place up to 5,000 pounds across both beams at that level.

Wire Decking

Wire mesh decking sits on top of the beams and provides a surface for pallets to rest on. This is especially important for fire code compliance — most fire marshals require wire decking because it allows sprinkler water to flow through to lower levels. Without decking, you're relying on pallets to bridge the beams, which works until a damaged pallet drops product onto someone below.

Anchoring

Every frame needs to be anchored to the floor. In seismic zones like California, the anchor specification is not optional — it's an engineered requirement. Standard wedge anchors in 1/2-inch or 3/4-inch diameter are the most common, but the specific anchor type, embedment depth, and spacing depend on the seismic calculations for your installation.

What Most Buyers Get Wrong

Focusing on price per beam instead of total installed cost. The beams and frames might be 40% of your total project cost. Anchors, wire decking, shims, column protectors, engineering, permitting, freight, and installation make up the rest. A quote that only covers the steel is incomplete.

Ignoring seismic requirements. In California, you need PE-stamped engineering calculations and building permits for racking installations over certain heights. If your supplier doesn't mention this, they're either unfamiliar with California requirements or planning to leave that problem to you.

Not accounting for the full pallet profile. Your racking dimensions need to account for the pallet, the product on the pallet, and the overhang. A 48-inch-deep pallet in a 42-inch-deep frame with product overhanging 2 inches per side means you need beam-to-beam clearance of at least 52 inches. Getting this wrong means pallets don't fit or product hangs into the aisle.

Overlooking column protection. Forklift impacts are the number one cause of racking damage. Column protectors are inexpensive relative to the cost of a frame replacement, and they dramatically extend the life of your installation. We carry over 150 column protector products for exactly this reason.

How to Get Started

The starting point for any racking project is understanding three things: what you're storing (pallet size, weight, and product profile), how much of it you need to store (total pallet positions required), and how fast you need to access it (throughput requirements that determine your racking type).

From there, a warehouse layout design determines the optimal configuration — racking type, aisle widths, beam levels, heights, and flow direction. In California, you'll need engineering calculations and permits before installation can begin.

If you're working with a broker like J&R, the advantage is access to multiple manufacturers' product lines, which means we can spec the best-fit components rather than being locked into one brand's catalog.

J&R Warehouse Equipment supplies over 2,000 racking and warehouse products across 24 categories. Contact us for a free quote on your next racking project.