Walk into almost any warehouse in America and you will find pallets. But not all pallets are built the same way. The two fundamental construction types, stringer pallets and block pallets, differ in design, strength, accessibility, cost, and suitability for different applications. Choosing the wrong type can lead to handling inefficiencies, compatibility problems with racking and automated systems, and unnecessary spending.
Understanding the key differences between stringer and block pallets helps you match the right pallet type to your application, streamline warehouse operations, and make more informed purchasing decisions. Here is a comparison of the two designs.
Construction: How Each Type Is Built
A stringer pallet uses two or three long boards, called stringers, that run the full length of the pallet between the top and bottom deck boards. These stringers are the primary structural members. They support the load and create the openings for forklift fork entry. The common 48x40 GMA pallet uses three stringers: one on each edge and one in the center. The top deck boards are nailed across the stringers to create the load-bearing surface.
A block pallet takes a different structural approach. Instead of continuous stringers, it uses short, square blocks, commonly nine arranged in three rows of three, positioned at the corners, sides, and center of the pallet. These blocks are connected by top and bottom deck boards and, in some designs, by stringerboard runners between the blocks. The result is a more complex but more versatile structure.
Construction Comparison
Fork Entry: 2-Way vs True 4-Way Access
The most significant operational difference between stringer and block pallets is fork entry direction. A standard stringer pallet allows full fork entry from only two sides, the open ends between the stringers. The sides of the pallet are blocked by the stringers themselves, preventing fork entry. Some stringer pallets are manufactured with notches cut into the stringers on the blocked sides to allow partial fork entry, creating what is called a "partial 4-way" or "notched stringer" pallet. However, notched entry is typically narrower than full entry and may not accommodate all forklift fork widths.
Block pallets provide true 4-way entry. Because the blocks are discrete structural points rather than continuous boards, forks can enter from all four sides with equal clearance. This makes block pallets more versatile in tight warehouse environments, double-deep racking systems, and applications where pallets must be accessed from multiple directions.
For businesses with narrow aisles, automated storage and retrieval systems, or frequent need to rotate pallets during loading, the 4-way entry of block pallets can improve operational efficiency. For straightforward shipping and storage where pallets are always accessed from the same direction, the 2-way entry of stringer pallets is adequate and the lower cost often makes them the more economical choice.
Strength and Durability: Performance Under Load
Block pallets are generally stronger than stringer pallets of equivalent size and wood species. The block construction distributes weight across multiple support points and uses both top and bottom deck boards as structural members, creating a rigid, box-like structure that resists bending, twisting, and racking forces more effectively than the linear stringer design.
General tendencies only. Actual ratings depend on construction, species and condition, so confirm with the supplier.
Block pallets' stronger racking performance matters for warehouses using selective, drive-in, or push-back racking systems. The continuous bottom deck boards of a block pallet span the racking beams, distributing the load and reducing the risk of board deflection. Stringer pallets, especially those with minimal or no bottom deck boards, rely on the stringers alone to bridge the racking beams, a configuration that is more susceptible to failure under heavy loads.
For applications that do not involve racking, such as floor stacking, direct shipping, and short-term storage, stringer pallets generally provide adequate strength at a lower cost. Their simpler construction also tends to make them lighter, which can matter in weight-sensitive freight. Our weight capacity guide explains how static, dynamic and racking ratings differ.
Cost Considerations: Price vs Performance
Stringer pallets are usually less expensive to manufacture than block pallets. They use fewer components and need simpler assembly. In both new and recycled markets, block pallets tend to cost more than comparable stringer pallets, although the gap varies with supplier, size and condition. Pricing is by quote from partner suppliers, so request both options if you are unsure which suits you.
Total cost of ownership should consider more than the purchase price. Block pallets often last longer under heavy use because of their more robust construction, so the cost per use cycle may favor block pallets in heavy-duty applications where stringer pallets would need more frequent replacement. Block pallets may also hold their value better on the secondary market, though that depends on local demand.
For many small and medium businesses in the Phoenix area, a reasonable starting point is to use stringer pallets for general shipping, warehouse storage, and applications where cost is the primary consideration, and to use block pallets for heavy loads, racking storage, automated handling systems, and international shipping to markets where block pallets are the standard format. Confirm the fit with your supplier and your equipment.
Industry Preferences: Who Uses What and Why
In the United States, stringer pallets make up the large majority of wood pallets in circulation. The 48x40 GMA stringer pallet is the de facto standard in grocery, retail, beverage, and general merchandise distribution. Its ubiquity means that most warehouses, trucks, and racking systems are designed to handle stringer pallets efficiently.
Block pallets are the preferred format in Europe, where the Euro pallet (1200x800 mm) is a block design. Companies involved in trade with European markets often use block pallets to maintain compatibility with their overseas customers' handling equipment. Chemical and automotive supply chains also often favor block pallets for their strength and 4-way handling characteristics.
Availability of each type varies by supplier. Some partner suppliers focus on standard GMA stringer pallets for everyday shipping, while others can source block pallets or specialty sizes. If you are unsure which type fits your operation, describe your equipment, loads and storage method in your quote request so the supplier can advise.