A good pallet load comes down to three rules: stack cartons square and inside the pallet's edges, put the heaviest boxes at the bottom, and keep the load within the height and weight limits of your carrier or receiver. Then stretch-wrap the load to the pallet, not just around the boxes, and strap it if it's heavy or tall.
Get those right and your pallet arrives intact, fits the receiver's dock and racking, and doesn't get reclassed for overhang. Get them wrong and you pay twice: once in damaged product, again in freight corrections. This guide covers stacking patterns and heights, stretch wrapping, hand strapping, and how to move pallets safely.
Key takeaways
- No overhang. As little as ½ inch of overhang can cost a box up to 30% of its compression strength (Fibre Box Association).
- Column-stack when box strength matters. Interlocking layers are more stable but reduce stacking strength - by more than 10% in Virginia Tech tests and by up to 50% according to the Fibre Box Association.
- Heights are set by receivers, not OSHA: Amazon and Walmart accept up to 72″ including the pallet, Costco 58″.
- Wrap to the pallet. Several turns around the base lock the load to the deck - that's where loads fail.
- Strap heavy or tall loads. On a flatbed, tiedowns must add up to at least half the cargo weight (49 CFR 393.106(d)).
How to stack boxes on a pallet
Choose a sound pallet of the right size. No broken boards or protruding nails; the footprint should match your cartons so nothing hangs over. A stiff top deck helps: Virginia Tech research found boxes on a stiff pallet deck carried 27–37% more compression load than on a flexible one.
Heaviest and strongest boxes at the bottom, lighter and more fragile on top.
Keep every box inside the pallet's edges. Overhanging boxes lose strength where the corners hang unsupported, and overhang raises your freight class.
Choose a pattern - column or interlocking (below) - and keep it consistent layer by layer.
Build flat, level layers. Fill gaps so the next layer sits on a flat surface; avoid pyramids.
Add tier sheets (slip sheets of corrugated or plastic) between layers for unstable or mixed cartons.
Put a top cap or top sheet on the last layer to spread strap pressure and keep dust and rain off.
Add corner boards on the vertical edges for tall, heavy or fragile loads.
Wrap, then strap if needed (Part 2).
Column vs. interlocking vs. pinwheel
Pattern | How it works | Strength | Stability | Use it for |
|---|---|---|---|---|
Column | Boxes stacked corner on corner, each column straight up | Keeps the boxes' full compression strength | Lower - columns can separate without wrap | Heavy or stacked loads where box strength matters |
Interlocking (brick) | Each layer rotated or offset so boxes bridge the seams below | Lower stacking strength - more than 10% (Virginia Tech), up to 50% (Fibre Box Association) | Higher - layers tie together | Light loads, tall loads, mixed handling |
Pinwheel | Boxes arranged in a spiral around the center, rotated each layer | Depends on the layout | Good for square footprints | Boxes whose dimensions don't divide the pallet evenly |
Column stacking with good stretch wrap and corner boards usually gives the best of both: full box strength and a stable unit. Interlocking is a trade-off: stability goes up, strength goes down.
How to stack a pallet with different size boxes
Largest and heaviest at the bottom, building a flat base layer that covers as much of the pallet as possible.
Group identical boxes into full layers or blocks where you can.
Fill gaps with void fill, smaller boxes or dunnage so upper layers don't sag into holes.
Use tier sheets to create a flat surface between uneven layers.
Put fragile or odd-shaped items on top, and keep the top flat enough to wrap.
Wrap more at the base and at level changes, where uneven loads tend to shift.
How to stack wood on a pallet
Lay boards or lumber lengthwise along the pallet, heaviest pieces at the bottom, in flat, even layers with stickers (spacer strips) between layers if the wood needs air. Keep ends even and within the pallet's footprint, and band the stack tightly - lumber loads shift as a unit if they aren't strapped.
What is ti-hi?
Ti-hi describes how a pallet is built: ti is the number of cases per layer (tier), hi is the number of layers. A 10 × 5 ti-hi means 10 cases per layer, 5 layers high - 50 cases per pallet. Retailers and warehouses publish ti-hi for each product so every pallet is built the same way. For how to calculate it and how many boxes fit on a pallet, see how many boxes fit on a pallet.
How high should a pallet be stacked?
For shipping, most loaded pallets are built 48–60″ tall including the pallet. The hard limits come from the receiver and the equipment: Amazon and Walmart accept pallets up to 72″, Costco 58″, and a 53′ trailer's door is about 104–105″ high. OSHA doesn't set a number - it requires stable stacks.
Limit | Max loaded height (incl. pallet) | Max weight | Source |
|---|---|---|---|
Typical LTL / general freight | 48–60″ common | Depends on pallet and carrier | Industry practice |
Amazon (FBA) | 72″ | 1,500 lbs | Amazon Seller Central |
Walmart | 72″ | 2,100 lbs | Walmart routing guide |
Costco | 58″ | 2,500 lbs | Costco routing guide |
Home Depot | Surcharge above 96″ | - | Home Depot routing guide |
Target | 96″; GMA Class 1 48 × 40 pallets required | - | Target routing guide |
53′ dry van door | ~104–105″ - ceiling for double-stacked units | - | Trailer specifications |
Amazon also requires wood 48 × 40 pallets in grade B or better with four-way entry - check the current routing guide of any receiver before you build.
How high can pallets be stacked - OSHA?
OSHA has no numeric limit. Its storage rule, 29 CFR 1910.176(b), requires that stored material be "stacked, blocked, interlocked and limited in height so that they are stable and secure against sliding or collapse." The "OSHA 15 ft" figure you may see is a myth. For empty pallet stacks, fire codes do set limits - 6 ft indoors for wood under standard sprinklers (NFPA 13) - see how to store pallets safely.
How tall can a pallet be for shipping?
As tall as the receiver, carrier and trailer allow - usually 48–60″, up to 72″ for Amazon and Walmart. If you plan to double-stack in a trailer, two units together must clear the door. For trailer-specific numbers, see how high you can stack pallets in a 53-foot trailer.
How many pallets can you stack?
Loaded pallets can be double-stacked when three things are true: the bottom load's boxes can carry the top load for the whole trip, the combined height fits the trailer door and ceiling, and the combined weight is within the pallet's and trailer's limits. Most carriers and warehouses stack loaded pallets no more than two high, and only when the top of the bottom pallet is flat and capped.
Don't double-stack when:
the boxes are weak, partly empty or contain liquids that could crush the load below;
the top layer isn't flat or the load is irregular;
the combined height exceeds the door opening;
the pallets are marked "do not stack."
What does "do not double stack" mean?
It means nothing may be placed on top of that pallet. Shippers mark it with labels or stacking cones (plastic cones on top of the load that physically prevent stacking). Carriers charge for it, because a non-stackable pallet uses the trailer space above it: FedEx Freight, for example, applies a non-stackable charge per handling unit. Use it only when the freight really can't carry weight - and make sure the label is on all sides and the top.
De-palletized is the opposite process: freight taken off the pallet and floor-loaded or handled case by case, often at a retailer's or 3PL's receiving dock.
How to stretch wrap a pallet
Start at the base. Tuck the end of the film between the bottom layer and the pallet deck, or tie it to a pallet corner.
Anchor the load to the pallet. Walk around the pallet several times at the bottom, wrapping over the joint between the pallet's top deck and the first layer of boxes. Twist the film into a rope for one turn and run it around the pallet's blocks or stringers - this locks the load to the pallet.
Keep tension on the film. Pull it tight enough to stretch as you walk; slack film holds nothing.
Spiral upward, overlapping each pass by about half the film width.
Wrap the top layer with a couple of extra turns, letting the film fold over the top edge.
Cover the top if needed (see below).
Spiral back down to the base, again with overlap.
Finish with a few more turns at the base, then tear the film and press the tail flat against the load.
The base is where loads fail: if the film only wraps the boxes, the whole load can slide off the pallet as one block. The rope at the base is the single most useful habit in hand wrapping.
Hand vs. machine wrap. Hand wrap is fine for a few pallets a day. A turntable stretch wrapper pre-stretches the film and applies even tension, using less film and producing more consistent loads - worth it once you wrap dozens of pallets a day.
Film choice. Film is sold by gauge (thickness), but the strength that matters is containment force - how hard the wrapped film holds the load together - which depends on film quality and how much it's stretched, not on gauge alone. Pre-stretched film is thinner but already stretched, so it's easier to apply by hand. For heavy or unstable loads, use more wraps and tighter film, not just thicker film.
How to wrap the top of a pallet
Place a top sheet (plastic or corrugated) on the load, then wrap the top layer so the film folds over the edges and holds the sheet. For full weather protection, lay a sheet of film or a top cover over the load before wrapping, so the wrap locks it down. A top sheet also keeps straps from cutting into the top boxes.
How much stretch wrap per pallet?
It depends on load height, film type and how many turns you use - there's no standard figure. To find your own number, weigh a roll before and after wrapping ten pallets and divide. Use that as your standard, and watch for sharp increases: they usually mean a wrapper who's over-wrapping, or loads that need better stacking instead of more film.
Stretch wrap vs. shrink wrap
Stretch wrap holds the load by its own elastic tension - no heat needed. It's the standard for palletized freight.
Shrink wrap is a plastic film (or bag) placed over the load and heated so it shrinks tight around it. It gives a sealed, weather-resistant cover, which is why it's used for outdoor storage, building materials and irregular loads.
How to shrink wrap a pallet
Put a shrink bag or film over the load, down past the pallet deck, then heat it with a shrink-wrap heat gun from the bottom up until it shrinks tight around the load and pallet. An open-flame heat gun counts as hot work under NFPA 51B: clear combustibles within 35 ft and post a fire watch. That's why most shippers use stretch wrap unless they need a sealed cover.
How to strap a pallet by hand
Strapping (banding) adds vertical and horizontal holding force that stretch wrap alone can't - for heavy, tall or rigid loads such as lumber, bricks, pails or machinery parts.
What you need:
Strap: polypropylene (PP) for light loads; polyester (PET) for heavier loads - Signode's 5/8″ PET strap is rated at about 950 lbs break strength, stretches less than PP and is more flexible than steel; steel strap for very heavy, sharp or hot loads.
Tensioner to pull the strap tight.
Seals, buckles or clips - metal seals crimped with a sealer, or wire buckles/clips that need no sealer.
Corner protectors so the strap doesn't cut into the boxes.
Steps:
Place corner protectors on the top edges of the load.
Feed the strap under the pallet through the fork openings - between the top and bottom decks - so it holds the load to the pallet.
Bring both ends up over the top of the load, centered on the load's width.
Thread the ends into a seal or buckle, overlapping them.
Tension the strap with the tensioner until it's tight and doesn't slide.
Crimp the seal (or lock the buckle) and cut off the tail.
Add more straps: usually two in each direction on a 48 × 40, set in from the edges.
How to strap a pallet with clips or buckles
Poly strap with wire buckles is the simplest hand setup: thread one end through the buckle and fold it back, pass the strap around the load, thread the other end through the buckle, pull it tight by hand or with a tensioner, and fold the tail back. No sealer is needed, and the buckle can be re-tensioned.
How to strap boxes to a pallet
Always pass the strap under the pallet's top deck (through the fork openings), not just around the boxes - otherwise the boxes stay strapped to each other but can still slide off the pallet. Protect the corners, and keep the strap away from the pallet's lead board edges, where it can be cut by a forklift.
How to use a pallet bander
A pallet bander (strapping machine) feeds the strap around the load, tensions and seals it automatically. Position the pallet in the machine's arch or under its track, set the strap tension for the load, and trigger the cycle; move the pallet to place each strap. Semi-automatic banders still need the operator to feed the strap by hand. Follow the manufacturer's instructions and never reach into the arch during a cycle.
How to strap pallets on a flatbed
On a flatbed, pallets must be secured to the trailer, not just strapped to themselves. Under federal cargo securement rules, the aggregate working load limit of all tiedowns must be at least 50% of the cargo's weight (49 CFR 393.106(d)), and the number of tiedowns depends on the length and weight of each article: an article longer than 10 ft needs two tiedowns plus one for every additional 10 ft, and shorter articles need one or two depending on length and weight (49 CFR 393.110). Use edge protectors where straps cross the load, and check the straps after the first miles and at each stop.
Is pallet wrap recyclable?
Usually, yes - stretch film is a polyethylene film that can be recycled where film recycling is available. Keep it clean and dry, separate from mixed trash, and bale or bag it. Ask your waste hauler or a plastic film recycler; high-volume warehouses often sell baled film. Retail drop-off bins for plastic bags are meant for consumer film, not for commercial volumes.
How to move pallets
Manual pallet jack: slide the forks fully under the pallet (through the ends on a stringer pallet; any side on a block pallet), pump the handle to lift, and pull rather than push on long runs. Keep the load low and the path clear.
Electric pallet jack or stacker: for longer distances, heavier loads or frequent moves.
Forklift: for lifting to racks, loading trucks and double-stacking; requires a trained, certified operator.
Mind the weight. A standard empty 48 × 40 wood pallet weighs 33–48 lbs and can be handled by one person with good technique; a block pallet such as PECO's (65–68 lbs) is over the 51-lb load constant in the NIOSH lifting equation, so use two people or a jack. See how much does a pallet weigh.
How to move pallets without a pallet jack
Empty pallets: carry them with two people, or slide them on their bottom deck - never lift a heavy block pallet alone.
Pallet dolly or skates: low wheeled platforms slid under the pallet; useful where a jack can't go.
Pry bar and rollers: lift one end with a pallet bar, slip rollers or pipe under, and roll - slow but works for short moves.
Break down the load: for loaded pallets, unload cases by hand rather than dragging a loaded pallet.
Never stand a pallet on its end to move it - it's unstable and can fall on your feet.
How to get pallets off a truck
At a dock: use a pallet jack or forklift over a dock plate or leveler.
Without a dock: use a liftgate - book liftgate delivery when you order, because the carrier charges for it and needs the right truck. See how to ship a pallet for accessorial costs.
With a forklift at ground level: a forklift can unload from the side of a flatbed, or from the back of a van if the forks reach.
Portable ramp: some box trucks carry a ramp for pallet jacks - only for light loads and with a slip-resistant ramp.
Common mistakes that cost you money
Overhang. Weaker boxes and a higher freight class - carriers measure the outermost points. See how to ship a pallet.
Pyramid or uneven layers. The top can't be stacked on and the wrap can't hold a flat face.
Too little wrap at the base. The load slides off the pallet as one block.
Straps that don't go under the pallet deck. Boxes stay together but leave the pallet.
Double-stacking without checking box strength - or marking "do not stack" when the freight could stack, which costs a non-stackable charge.
A damaged or wrong-size pallet. Broken boards and wrong footprints cause overhang and failures. A grade A 48 × 40 costs a few dollars and protects a load worth far more - buy pallets for shipping, including heat treated stock for export.
Frequently asked questions
How do you stack boxes on a pallet?
Put the heaviest boxes at the bottom, keep every box inside the pallet's edges, and build flat, level layers in a column or interlocking pattern. Add tier sheets for mixed boxes, a top sheet and corner boards, then stretch-wrap the load to the pallet.
How high should a pallet be stacked?
Most shipping pallets are 48–60″ tall including the pallet. Amazon and Walmart accept up to 72″, Costco 58″. OSHA doesn't set a number but requires stable stacks; empty pallet stacks are limited by fire codes.
How many times should you wrap a pallet?
There's no single number. Wrap several turns around the base to lock the load to the pallet, spiral up with about 50% overlap, add extra turns at the top, and come back down. Heavy or unstable loads need more turns and tighter film.
How do you strap a pallet by hand?
Pass the strap under the pallet's top deck through the fork openings, bring both ends over the top with corner protectors, join them in a seal or buckle, tighten with a tensioner and crimp or lock it. Use two straps each way on a 48 × 40.
What is ti-hi?
Ti-hi describes a pallet pattern: "ti" is the number of cases per layer and "hi" is the number of layers. A 10 × 5 ti-hi is 10 cases per layer, 5 layers high - 50 cases.
Can you double stack pallets?
Yes, if the bottom load's boxes can carry the top load, the combined height fits the trailer door and the weight is within limits. Don't double-stack weak, irregular or "do not stack" freight.
What does "do not double stack" mean?
Nothing may be placed on top of that pallet. It's marked with labels or stacking cones. Carriers charge for non-stackable freight because it uses the space above it.
How do you move a pallet without a pallet jack?
Use a pallet dolly or skates, or lift one end with a pallet bar and roll it on rollers. Carry empty pallets with two people - block pallets weigh 65 lbs or more - and unload heavy loads by hand rather than dragging them.