A cantilever racking system solves a problem that standard shelving cannot handle: storing long, heavy, or oddly shaped items without the front uprights getting in the way. Timber, steel pipes, plywood sheets, and furniture components do not fit neatly into box-shaped bays. They need open-front access and adjustable arm spacing, and that is what cantilever racks deliver.
What Makes Cantilever Racking Different
Most pallet racking uses vertical frames on both sides of each bay, connected by horizontal beams. Cantilever racking drops the front frame. Instead, arms extend out from a single row of uprights at the back, creating unobstructed loading from the front and side.
This open design lets forklift operators slide long items onto the arms without tilting, angling, or forcing them into a tight opening. You load from the front, adjust the arm height to match the goods, and stack multiple levels without the restrictions that conventional frames impose.
Because the arms bolt into the uprights at fixed intervals, you can reposition them as your inventory changes. A rack holding six-metre timber lengths today can hold three-metre aluminium extrusions next month with a quick adjustment and no new parts.
Where Cantilever Racks Fit Best
Any warehouse storing items longer than a standard pallet will benefit from a cantilever racking system. The most common applications include:
- Timber and lumber yards – Planks, beams, and boards of varying lengths sit flat across multiple arms, sorted by size or species
- Steel and metal suppliers – Pipes, bars, angle iron, and sheet metal stack without bending or damage
- Furniture manufacturers – Table tops, bed frames, and long panel components stay organised and accessible
- Building material distributors – PVC pipes, conduit bundles, and cladding panels store safely off the ground
Retailers selling carpets, rolled fabric, or long boxed goods also use cantilever systems in their back-of-house storage areas.
Single-Sided Versus Double-Sided Configurations
A single-sided cantilever rack sits against a wall. Arms extend in one direction, and you access the goods from the front only. This layout works well in narrow spaces or along the perimeter of a warehouse where wall-facing storage makes sense.
A double-sided rack stands in the open with arms extending from both sides of the central upright column. You load and pick from two sides, and the rack holds roughly twice the stock in the same footprint. Most cantilever storage systems in large warehouses use the double-sided version to get the best return on floor space.
Your choice depends on how much room you have and how your forklifts move through the facility. Double-sided racks need aisle access on both sides, so factor that into your layout planning.
Load Capacity and Structural Considerations
Cantilever racks carry serious weight. A single arm on a heavy duty unit can support over 1,000 kilogrammes, and a full column with six arms can hold several tonnes. But those numbers only hold if the base, uprights, and arms match the load profile.
Three factors determine how much weight your system handles safely:
- Arm length – Longer arms create more leverage on the upright. A 1.2-metre arm under full load puts far more stress on the connection point than a 600-millimetre arm carrying the same weight per metre.
- Upright gauge – Thicker steel columns resist bending better. For heavy industrial loads, specify uprights rated for the total weight of all arms on one side at full capacity.
- Base depth – The floor-mounted base must extend far enough behind the uprights to prevent the rack from tipping forward under load. Bolting the base to the concrete floor adds extra stability.
As Lee Kuan Yew once said, “We have to be prepared for the unexpected, and we have to be able to deal with it.” Warehouse operators who over-specify their racking by a safe margin avoid the unpleasant surprise of a structural failure during a busy season.
Fitting Cantilever Racks into Your Warehouse
Before you order, measure your longest items and add clearance. The arms should be long enough to support the full length of the goods without overhang, and the vertical spacing between arms should leave room for loading without scraping the level above.
Walk through these steps with your supplier:
- Measure your inventory – Record the length, width, and weight of your heaviest and longest items
- Map your floor plan – Decide where single-sided and double-sided units will go, and confirm that forklift turning circles fit the aisle widths
- Check floor loading – Verify that the warehouse slab can handle the concentrated point loads from the base plates
- Plan for growth – Order extra arms and taller uprights if you expect your product range to expand within the next two years
A supplier who visits your site, checks the floor condition, and reviews your inventory list before quoting will give you a system that fits. One who quotes from a catalogue alone may miss something that costs you later.
Getting Started with the Right System
Cantilever racking turns dead space into productive storage for items that standard shelving cannot accommodate. Businesses across Singapore, from timber merchants to steel fabricators, rely on these systems to keep long and bulky goods organised, accessible, and safe.
If you store anything that hangs off the edge of a pallet or does not stack neatly in a box bay, a cantilever racking system belongs on your shortlist.