Inside Pallet Repair: Stringers, Deck Boards, and Blocks

Walk into our repair bay and you'll see the opposite of a shredder. The whole discipline is bringing damaged pallets back to a working grade with the smallest possible intervention, using reclaimed lumber harvested from pallets too far gone to save. Repair is where the economics and the environmental case of reclaimed pallets actually get made — it's the beating heart of our recycling service. Here's how the common fixes work.

Fixing stringers, the pallet's spine

In a stringer pallet, the three (sometimes more) lengthwise runners carry the load and take the forklift entry. When a fork punctures one or a stringer splits along the grain — often right at a notch — the pallet sags and becomes unsafe. There are two standard repairs, and choosing between them is the first judgment call.

Stringer plating (metal mending)

A metal repair plate or truss connector is nailed across the crack, clamping the split closed and restoring the stringer's stiffness. Plating is fast and strong for a clean split, and it's the go-to when the stringer is otherwise sound. The plate spans the break and ties the fibers back together so the runner carries load again.

Companion (sister) stringers

When a stringer is badly broken or the fork entry has been chewed up, we add a companion stringer — a full-length reclaimed runner nailed alongside the damaged one, sharing or taking over the load. It's more material than a plate but restores near-original capacity when a plate alone won't hold. If you want the deeper background on stringer versus block construction, the block vs stringer pallets piece lays out the anatomy.

Replacing deck boards

Deck boards are the most commonly damaged members — they take the direct load and the abuse of loading and unloading. A cracked, split or missing deck board is a straightforward swap: pull the fasteners, remove the failed board, and nail in a reclaimed board of matching thickness and width. The trick is matching the board so the deck sits flat and the load spreads evenly; a proud or undersized replacement creates the very high spot that damages product or jams automation.

Lead boards — the outer deck boards that take the forklift's first contact — get replaced most often, so we keep sorted reclaimed deck stock staged by dimension. Understanding which boards fail and why ties straight back to the patterns we cover in common pallet defects.

“Every good deck board on a scrapped pallet is a repair waiting to happen on the next one. Nothing sound gets shredded.”

Block plugging and replacement

Block pallets rest on nine (or however many) solid blocks instead of stringers. When a block is crushed, split or torn loose, the fix is to knock out the damaged block and drive in a sound reclaimed one — a block plug — re-nailing through the deck and any bottom board to lock it. Because blocks are discrete components, block pallets are often quicker to repair than stringers: you're replacing a single module rather than plating a full-length runner.

The tools and fasteners that make it hold

A repair is only as good as its fasteners. The bay runs on pneumatic nailers driving stiff-stock or drive-screw nails chosen for holding power in reclaimed hardwood, plus metal connector plates for stringer work. Getting the fastener right is not a detail — the wrong nail backs out under vibration and undoes the repair. That's the whole reason we obsess over hardware in nails, staples and pallet fasteners.

• Pneumatic nailers with stiff-stock or screw-shank nails for maximum withdrawal resistance.
• Metal repair plates and truss connectors for stringer plating.
• A pry bar and nail puller for clean member removal without splitting neighbors.
• Sorted reclaimed deck boards, stringers and blocks, staged by dimension.
• A dimensional and squareness check so the repaired unit re-enters at an honest grade.

When repair loses to replacement

Repair isn't infinite. There's a break-even: once the labor, fasteners and lumber to fix a pallet approach the value of a comparable reclaimed unit, fixing it stops making sense. A pallet with multiple broken stringers, widespread rot, or fasteners so worked they won't hold new nails has reached that line. At that point the smart move isn't the trash — it's teardown. The pallet becomes a parts donor, its sound boards and blocks feeding the next hundred repairs.

That's the loop that keeps reclaimed pallets cheap and low-carbon: repair until repair stops paying, then harvest, then and only then send the truly spent fiber onward. Got a heap of broken pallets you assumed were garbage? They're feedstock. Ask us about a pickup and we'll sort the fixable from the finished.