Pallet Supply USA

Materials · 6 min read

Stringer vs block: the pallet jack test settles it

I have watched this argument run for an hour in a conference room when it could have been settled in ten seconds on the warehouse floor.

Ray CastellanosRepair Shop Foreman

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01The ten-second test

Walk onto your floor. Watch how a loaded pallet gets moved. If it is only ever a forklift, a notched stringer pallet does everything you need and costs less. If a manual pallet jack has to come at it from the long side, you need block construction, and no amount of cost engineering changes that.

The reason is geometry, not quality. A jack's load wheels have to roll along the floor underneath the pallet. On a block pallet there is a continuous channel between the blocks on both axes. On a notched stringer pallet, the notch is an inch and a half deep and the wheels cannot drop through it.

02What the words actually mean

TermForkliftPallet jackConstruction
2-way2 sides2 sidesUnnotched stringers — the strongest stringer type
Partial 4-way4 sides2 sidesNotched stringers
4-way notched4 sides2 sidesSame as above, different name
Full 4-way4 sides4 sidesBlock pallet

03The strength question

Block pallets carry more, and the reason is that they never cut a hole in a load-bearing member. A stringer pallet solves fork access by notching a beam at mid-span, which is structurally the worst place to remove material. Nearly every stringer failure I see in the repair shop starts at a notch shoulder and runs with the grain.

MeasureStringer 48x40Block 48x40
Racked capacity1,800–2,500 lb2,500–3,300 lb
Racked as % of static~33%~43%
Typical service trips5–78–11
Weight38–48 lb44–58 lb
Purchase priceBaseline+15–25%

04The repair argument, from the shop floor

This is the part that never makes it into a purchasing comparison and it matters more than the purchase price over a fleet's life.

When a block pallet is damaged, I usually replace one block. Cut it out, fit a new one, done. The deck structure is undisturbed and the pallet comes out of the shop at the same grade it went in.

When a stringer pallet has a cracked stringer, I have two options. Add a companion stringer — which works, but adds 3 to 5 lb and drops the pallet from Grade A to Grade B — or dismantle it. There is no repair that leaves it as it was.

Over a fleet on a repair programme, that difference shows up in the annual repair bill within a year. It is the reason every serious pooling operation standardises on block construction.

05So when does stringer win?

Often. Most of the time, in fact, which is why stringer pallets are the majority of what moves in North America.

  • One-way freight. You are paying for durability that somebody else consumes.
  • Forklift-only operations. The jack argument never arises.
  • Cost-sensitive lanes where the pallet is a consumable rather than an asset.
  • Weight-sensitive freight, where 6 to 10 lb per pallet is a real cost.
  • Anywhere you need availability now — recovered stringer stock is far more plentiful than recovered block stock.

The break-even against block is roughly three round trips. Below that, stringer. Above it, run the numbers, and remember to include the repair line rather than just the purchase price.

Two EPAL block pallets stacked, with IPPC heat-treatment stamps burned into the corner blocks reading DE-NW 497027 HT and US 167 HT.
EPAL block pallets with their marks visible: a German facility and a US one, both heat treated. The mark must appear on two opposing sides.
Large indoor sorting area filled with stacks of used wood pallets of varying sizes and conditions, including some blue and red pool pallets.
Intake, before grading. Every pallet in this frame gets picked up and assessed by hand — about four seconds each.

Vocabulary

Terms this article uses

Pulled from the text automatically and defined the way the trade uses them.
Block pallet
A pallet using nine solid blocks instead of stringers, giving genuine four-way access for both forklifts and pallet jacks. Stronger and more durable than a stringer pallet, and 15–25% dearer.
Companion stringer
A second stringer nailed alongside a cracked original during repair. Structurally sound, adds 3–5 lb, and disqualifies a pallet from Grade A.
Grade A
Our top recycled tier: no companion stringers, two or fewer replaced deck boards, one plug maximum, squareness within 0.5 inch.
Grade B
Companion stringers permitted, up to five replaced boards, up to three plugs, squareness within 0.75 inch. The most commonly traded recycled grade.
Notch
The cut-out in a stringer allowing fork entry from the side, typically 9 inches long by 1.5 inches deep. Also the most common point of structural failure.
Pooling
A rental model where a third party owns the pallets and charges per trip. CHEP, PECO and iGPS are the major North American pools.
Stringer
The board set on edge that separates the top and bottom decks of a stringer pallet. Usually 1.5 x 3.5 inches nominal.

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