Why Pallets Get Stuck in Racking — and What to Check Before Changing the Rack

Pallets often get stuck in racking because the pallet dimensions, load overhang, forklift operating height or beam-level spacing do not match the actual storage condition. Before changing the rack, check the pallet, load, forklift and rack configuration together so the real cause is corrected.

Slow pallet placement and retrieval are not always caused by the racking itself. In many warehouses, the problem develops because pallet sizes have changed, goods extend beyond the pallet, forklift clearances are insufficient or beam levels no longer suit the current load height.

Changing the rack too quickly can create new problems without solving the original one. A better approach is to identify where the interference happens and what has changed in the operation.

1. Pallet Sizes Are Not Consistent

One of the most common causes of difficult pallet handling is inconsistent pallet size.

A racking layout may have been planned around a specific pallet width, depth and loaded height. If different pallet types are later introduced, the available clearances may no longer be sufficient.

Common problems include:

pallets that are wider than the original specification;
deeper pallets that project further into the rack;
damaged pallets with broken or distorted boards;
mixed pallet types used within the same rack bay; and
inconsistent pallet heights caused by different stacking methods.

Even a relatively small dimensional difference can make pallet placement slower if the forklift operator has very little clearance.

What should you check?

Measure the actual pallets currently being used, not only the nominal pallet size stated in purchasing documents.

Check:

pallet width;
pallet depth;
total loaded height;
pallet condition;
bottom-board arrangement; and
whether different suppliers use different pallet formats.

If the warehouse stores more than one pallet size, the rack configuration should be reviewed against the largest and most difficult-to-handle pallet.

2. The Goods Are Overhanging the Pallet

The pallet may fit the rack, but the load itself may not.

Boxes, bags, drums or other goods can extend beyond the pallet edge. This overhang can reduce the working clearance between the load and the rack uprights, beams or neighbouring pallets.

Load overhang can lead to:

pallets catching on rack uprights;
cartons rubbing against beams;
difficulty aligning the pallet before placement;
damaged packaging;
slower forklift movement; and
increased risk of unstable loads.

Why is overhang easy to miss?

Warehouse measurements often focus on pallet dimensions only.

For example, a pallet may be 1,000 mm wide, but the loaded goods may extend beyond both sides. The effective load width is therefore greater than the pallet itself.

The same issue applies to height. Loose wrapping, uneven cartons or protruding products can make the actual loaded pallet higher than expected.

What should you measure?

Measure the maximum overall loaded dimensions:

total load width;
total load depth;
total loaded height; and
any irregular protrusions.

The rack should be reviewed against the complete loaded pallet, not the empty pallet footprint alone.

3. The Forklift Cannot Reach or Position the Pallet Comfortably

A pallet can technically fit into a rack position while still being difficult for the forklift to place or remove.

This is especially common at higher storage levels.

Possible causes include:

insufficient forklift reach height;
limited lifting capacity at the required height;
inadequate mast clearance;
poor visibility at upper levels;
unsuitable fork length;
insufficient aisle width; and
difficulty positioning the pallet accurately.

If the forklift is operating near its practical limits, every pallet movement can become slower.

Rack height and forklift capability must be reviewed together

It is not enough to ask whether the forklift can physically lift to the beam level.

The operation should also consider whether the equipment can:

position the pallet accurately;
maintain the required clearance;
operate safely at the intended height; and
manoeuvre within the available aisle.

A change in forklift model can also create problems in an existing warehouse.

A rack designed around one type of equipment may not work as efficiently after a different forklift, reach truck or handling method is introduced.

4. The Beam Level Is Too Tight for the Loaded Pallet

Beam-level spacing has a direct effect on pallet handling speed.

If there is very little clearance above the loaded pallet, forklift operators need to position the load very precisely before entering or removing it from the rack.

This can cause:

repeated lifting and lowering;
slow pallet alignment;
contact with the beam above;
difficulty removing tall loads; and
damage to goods or rack components.

More storage levels are not always better

Adding extra beam levels can increase the theoretical number of pallet positions, but reducing vertical clearance too much may make the warehouse harder to operate.

A practical layout should balance storage capacity with handling clearance.

Before adjusting beam levels, confirm the actual loaded pallet heights and the amount of operational clearance required.

5. Pallets Are Not Sitting Correctly on the Beams or Supports

Sometimes the issue is not the opening size but how the pallet interfaces with the rack.

Depending on the pallet and racking configuration, problems may occur if:

the pallet is not centred;
the pallet depth does not suit the beam arrangement;
support bars are positioned incorrectly;
the pallet is damaged;
the pallet is entering the bay at an angle; or
the load distribution makes positioning difficult.

If a pallet repeatedly catches at the same point, inspect the rack position carefully.

The problem may be related to the pallet support arrangement rather than the overall rack width.

6. The Rack Has Been Damaged or Moved

A rack that previously worked correctly but suddenly becomes difficult to use should be checked for damage or movement.

Forklift impacts can affect:

upright alignment;
beam position;
bracing;
base plates;
anchors; and
the overall geometry of the rack bay.

Even if the damage does not appear severe, a small change in alignment can reduce the clearance available for pallet handling.

Watch for these warning signs

Check whether:

one upright appears bent;
beam levels are no longer aligned;
the rack is leaning;
anchors are loose;
the rack position has shifted; or
scrape marks suggest repeated impact.

If difficulty began after a collision, inspect the rack before modifying the beam level or increasing the opening.

7. The Pallet Load Has Changed Since the Rack Was Installed

Warehouse operations change over time.

A rack originally designed around one product may later be used for:

taller cartons;
heavier pallets;
different packaging;
larger pallet footprints;
more unstable loads; or
different stock-handling methods.

The rack may still look unchanged, but the operating requirement is no longer the same.

This is why older warehouse layouts should be reviewed when new product lines or pallet formats are introduced.

What Should You Check Before Changing the Rack?

Before moving beams, widening bays or replacing the racking, check the complete storage system.

A useful review should include:

Actual pallet dimensions
Measure the pallets currently used in the warehouse.
Loaded pallet dimensions
Include overhang, wrapping and irregular products.
Maximum loaded height
Check the tallest real pallet, not only the average.
Maximum pallet weight
Confirm whether the current loading still matches the rack configuration.
Forklift type and reach height
Review whether the existing equipment can handle the rack efficiently.
Aisle width and manoeuvring space
Confirm whether operators have enough room to align the pallet.
Beam-level spacing
Check whether the vertical clearance is practical for placement and retrieval.
Rack condition and alignment
Look for impact damage, movement or distortion.
Pallet supports and accessories
Confirm that support bars, stoppers and related components suit the pallet type.
Changes in warehouse operations
Identify whether the pallet, product, forklift or storage method has changed since the original installation.

Pallet Problem or Rack Problem?

A simple way to diagnose the issue is to identify whether the problem follows the pallet or the rack position.

Observation	Possible Cause
Only certain pallets get stuck	Pallet size, damage or load overhang
Every pallet gets stuck in one bay	Rack alignment, beam spacing or bay condition
Upper levels are difficult	Forklift reach, visibility or vertical clearance
Problem started after changing forklift	Equipment compatibility or aisle clearance
Problem started after introducing new products	Load dimensions or pallet profile changed
Pallets rub against uprights	Excessive width, overhang or poor alignment
Pallets hit the beam above	Loaded height too high or beam level too tight

This type of comparison can help narrow the cause before physical changes are made to the racking.

Should You Move the Beam Level?

Sometimes beam-level adjustment is appropriate, but it should not be the first reaction.

Moving a beam may improve vertical clearance, but it can also affect:

the number of storage levels;
pallet position capacity;
rack configuration;
operating height; and
how loads are distributed through the system.

Before changing beam levels, confirm the current pallet load, rack configuration and intended use.

Rack components should not be repositioned casually without checking whether the revised arrangement is suitable for the system.

What If the Bay Is Too Narrow?

If the pallet and loaded goods are consistently too wide for the rack bay, the problem may require a broader layout review.

Possible issues include:

changed pallet specification;
oversized products;
excessive load overhang;
an unsuitable bay width; or
mixed pallet sizes being stored in the same rack.

Do not assume that increasing bay width is automatically the best solution.

A wider bay can affect beam loading and the overall rack configuration, so any structural change should be properly reviewed.

How Can You Make Pallet Placement Faster?

Improving pallet handling usually requires reducing unnecessary correction movements during placement and retrieval.

Useful improvements may include:

standardising pallet sizes;
controlling product overhang;
using consistent pallet stacking methods;
maintaining adequate vertical clearance;
matching forklift capability to rack height;
keeping aisles clear;
repairing damaged pallets;
maintaining rack alignment; and
reviewing frequently problematic storage positions.

The goal is not simply to make the pallet fit. The goal is to make normal handling repeatable and efficient.

Why Frequent Pallet Jamming Should Not Be Ignored

Pallets that regularly catch, scrape or require repeated repositioning are more than an efficiency problem.

Frequent contact can lead to:

damaged goods;
damaged pallets;
beam impacts;
upright impacts;
unstable pallet placement;
slower forklift cycles; and
increased operator frustration.

Repeated difficulty is a sign that the storage arrangement should be reviewed.

Waiting until a beam or upright is damaged can turn a small operational problem into a maintenance and safety issue.

Information to Provide When Requesting a Racking Review

If pallet placement or retrieval has become difficult, prepare the following information before requesting a site review:

warehouse location;
rack system type;
pallet width and depth;
maximum loaded pallet height;
maximum pallet weight;
photographs of the pallet and rack position;
forklift model or handling-equipment type;
forklift reach height;
aisle width;
beam-level dimensions;
description of where the pallet gets stuck; and
whether the problem affects every pallet or only certain loads.

Video or photographs showing the actual pallet-placement problem can also help identify whether the issue is related to clearance, alignment or handling.

Frequently Asked Questions

Why does a pallet fit on the floor but not fit easily into the rack?

The loaded pallet may be wider or taller than the empty pallet because of product overhang, wrapping or uneven stacking. Rack clearance should be checked against the complete loaded pallet.

Can I simply move the beam higher?

Sometimes, but beam adjustment should only be made after confirming the rack configuration, pallet height, loading and required storage arrangement. Changing one level can affect the rest of the system.

Why are only the top rack levels difficult to use?

The forklift may be operating close to its reach or visibility limits, or there may be insufficient vertical clearance above the pallet at higher levels.

Can different pallet sizes be stored in the same racking?

They may be, depending on the rack configuration, but the largest pallet dimensions and handling requirements should be considered. Mixed pallet sizes can create inconsistent clearances.

Why did pallets become difficult to handle when the rack was fine before?

Something in the operation may have changed, such as pallet dimensions, product height, forklift type, beam levels or rack alignment after an impact.

Check the Pallet, Forklift and Rack Together

If pallets keep getting stuck, do not assume the racking is automatically the problem.

Start by checking the actual pallet dimensions, load overhang, forklift capability, beam spacing and rack condition. In many cases, the real issue is a mismatch between several parts of the storage operation rather than one defective component.

In summary, pallets commonly become difficult to place or retrieve because pallet sizes are inconsistent, goods overhang the pallet, forklift operating height is insufficient or beam levels provide too little clearance. Reviewing these factors before modifying the racking can help solve the real cause while protecting storage capacity and warehouse efficiency.