Small Warehouse Racking Layout for Units Under 500 sqm

A small warehouse racking layout succeeds or fails on three decisions: the aisle, the height and how pallet storage sits beside hand picked stock. This blog will walk you through planning units under roughly 500 sqm, with a worked layout for a typical JTC B1 unit, before you ask any storage rack supplier in Singapore to quote.

What makes a small warehouse layout different?

In a large warehouse, one badly placed aisle costs a few percent of capacity. In a 150 sqm to 500 sqm unit it can cost a whole run. Most small Singapore units have one loading door, a fixed ceiling and a floor loading set by the building, so the layout has very little slack.

This page covers the layout itself: where aisles go, how high to build and how to combine systems. If you are still deciding which system suits your stock, start with our guide to choosing between shelving and racking. If your stock is light and hand loaded, boltless shelving for small warehouses may do the job on its own.

How do you choose the aisle width in a small unit?

Choose the truck first. The aisle width follows from how pallets are moved, and in a small unit that choice changes the number of runs you can fit.

Handling equipment	Typical working aisle	Where it fits
Counterbalance forklift	3.2 m to 3.5 m	Units that also load trucks outside or handle heavy pallets
Reach truck	2.6 m to 2.9 m	Taller racking with frequent pallet moves
Walkie stacker	2.0 m to 2.4 m	Right angle stacking up to about 3 m
Hand pallet truck	1.4 m to 1.6 m	Floor level pallet moves only
Hand picking (people and trolleys)	about 1.2 m	Longspan and shelving pick faces

The truck ranges come from our warehouse aisle width planning guide, which also covers cross aisles, pallet overhang and lift height. The 1.2 m picking aisle matches the clear passageway JTC asks for beside exempt shelving.

In a unit 9 m wide, swapping a 3.5 m counterbalance aisle for a 2.4 m stacker aisle saves 1.1 m. That is enough for another run of pallet racking at 1.1 m deep, or a double run of 600 mm longspan shelving. The catch is that a stacker lifts lower and moves slower than a forklift, so the saving suits units with modest pallet traffic.

Keep the aisle one way where possible. Two trucks passing needs 4.0 m to 4.5 m, which a small unit rarely has room for.

How high should racking go in a small warehouse?

Build to the lowest of four limits.

1. Ceiling and sprinklers. Take the clear height to the lowest obstruction, then subtract the sprinkler clearance set by the fire protection design and the height of the top load.
2. Truck lift. A walkie stacker working at about 3 m sets the top beam; a reach truck lifting 8 m to 10 m will outrun most small units’ ceilings.
3. Floor loading. Taller racking puts more weight on each base plate. Compare it with the unit’s rating in kN/m², which JTC and landlords publish for each unit.
4. JTC plan consent. JTC’s Space Submission Handbook exempts racks from plan consent only up to 3.0 m high and 1.2 m wide, with gross weight within 7.5 kN/m² or the design imposed load, whichever is lower, and a 1.2 m clear passageway. Most pallet racking goes past that, so budget time for the submission.

In older flatted factories with 3.5 m to 4.2 m ceilings, the headroom budget is tight enough that height stops being the answer. Our guide to racking for 4 metre ceiling warehouses works through those cases.

How do you mix pallet racking and longspan shelving in one unit?

Most small operations receive pallets but pick cartons. The layout that fits that pattern splits the unit in two: pallet racking for reserve stock and longspan shelving for the pick face.

Where each system goes

Put pallet racking on the side nearest the loading door, so pallets travel the shortest distance from the shutter and the truck aisle stays out of the picking zone. Put longspan shelving on the far side, facing a pedestrian aisle, where pickers work without a truck moving behind them.

Replenishment then runs one way. A pallet comes down from reserve, cartons go onto the longspan shelf, and the empty pallet goes back to the door. Our guide to longspan shelving in Singapore covers spans, levels and loads for the pick side.

Keeping the two systems safe together

Each system needs its own load notice showing its own limits. Pallet racking is rated per beam level and per bay, longspan per shelf level, and staff will read whichever sign is nearest. MOM’s WSH circular on the safe use of storage racks expects safe working loads to be displayed prominently and staff trained on them.

Separate trucks from pickers with the layout itself. The pallet aisle and the picking aisles should not be the same aisle, and the end of each pallet run facing the door needs impact protection, because that is where trucks turn.

What does a layout look like in a real JTC B1 unit?

The layout below is illustrative, not a record of a specific NTL project. It uses published specifications from a 172 sqm ground floor unit JTC marketed at YS-One in Yishun in August 2026: B1 zoning, 5.5 m ceiling height and 15 kN/m² floor loading. We have assumed the unit is 9.0 m wide and 19.1 m deep, with one roller shutter on the short side.

Zone	Layout	Capacity
Door and staging, 4.5 m deep across the front	Pallet receiving, packing bench, dispatch	Working area
Pallet racking, two runs facing one 2.4 m stacker aisle	Five 2.7 m bays per run, ground level plus two beam levels, top beam at 3.0 m	60 pallet positions
Walkway, 1.2 m	Pedestrian route between the pallet zone and the pick zone	None
Longspan shelving, one double run and one single run on the far wall, with a 1.2 m aisle between	Seven 1.8 m bays along each of the three faces, 600 mm deep, four levels to about 2 m	21 bays, 84 shelf levels

Across the 9.0 m width, that is 1.1 m of pallet racking, a 2.4 m stacker aisle, another 1.1 m of pallet racking, a 1.2 m walkway, a 1.2 m double longspan run, a 1.2 m picking aisle and a 0.6 m single longspan run: 8.8 m in total.

Two checks come out of this layout. The top load sits at about 4.4 m with 1.3 m tall pallets, which leaves room under a 5.5 m ceiling, but the sprinkler clearance still has to be confirmed against the unit’s fire protection drawings. And with 800 kg pallets on three levels, each pallet bay puts about 15 kN/m² onto its own footprint, right at the unit’s rating, even though the average across rack and aisle is about 7.3 kN/m². Heavier pallets or a fourth level would need an engineer’s check of the point loads under the base plates. The pallet racking also goes past JTC’s exemption limits, so it needs plan consent.

Common layout mistakes in small units

Most small unit problems come from drawing the racks before drawing the building. Three mistakes come up again and again.

1. Ignoring columns, pipes and the fire exit route. A run that looks perfect on a blank rectangle loses a bay to a column or blocks an exit on the real plan.
2. Sizing the aisle for the truck you hope to buy. If the team keeps the counterbalance forklift, a 2.4 m aisle will not work.
3. No space at the door. Without a staging area, pallets wait in the truck aisle and the whole layout slows down.

Planning a small warehouse layout with NTL Storage

NTL Storage has designed and installed racking in Singapore since 2012, including compact units where every aisle counts. Send us the unit plan, clear height, floor loading, your pallet and carton mix and the equipment you use, and we will draw a layout with pallet and shelf positions counted, so you can compare options before committing to steel. If the unit is in a JTC estate, we will also flag which parts of the layout need plan consent.

FAQs About Small Warehouse Racking Layout

What is the best racking layout for a small warehouse?

Usually pallet racking near the loading door for reserve stock and longspan shelving on the far side for picking, with one truck aisle and separate pedestrian aisles. The best version depends on your truck, clear height and floor loading, so draw it on the real unit plan with columns and exits marked.

How wide should aisles be in a small warehouse?

It depends on how pallets move. Counterbalance forklifts need 3.2 m to 3.5 m, reach trucks 2.6 m to 2.9 m, walkie stackers 2.0 m to 2.4 m and hand pallet trucks 1.4 m to 1.6 m. Hand picking aisles for shelving usually work at about 1.2 m.

How high can racking go in a small JTC unit?

Up to the lowest of the ceiling less sprinkler clearance, your truck’s lift height and the floor loading limit. In JTC premises, racks above 3.0 m high or 7.5 kN/m² gross weight also need JTC plan consent, so taller layouts need extra time before installation.

Can I mix pallet racking and longspan shelving?

Yes, and most small warehouses should. Pallet racking holds reserve pallets near the door, longspan shelving holds hand picked cartons, and stock flows from one to the other. Give each system its own load notice and keep trucks out of the picking aisles.

Do I need a forklift for a small warehouse?

Not always. A walkie stacker handles right angle stacking up to about 3 m in a 2.0 m to 2.4 m aisle, which suits many units under 500 sqm with modest pallet traffic. A counterbalance forklift is better if you also load trucks outside or move heavy pallets often.

How many pallets fit in a 170 sqm warehouse?

In our illustrative 172 sqm layout with a 2.4 m stacker aisle and three pallet levels, about 60 pallet positions fit alongside 21 longspan bays and a staging area. Your number depends on the truck, ceiling, columns and how much space picking and packing need.