Cantilever Rack Installation
Site review, engineered drawings, anchoring, assembly and load plating — single- and double-sided, indoor and outdoor cantilever systems installed across Southern Ontario.
Cantilever racking is only as good as the install
A cantilever rack carries its load on arms bolted to a single column, so everything holding it up runs through the base, the anchors and the floor underneath. When the install is wrong the rack does not fail quietly — it leans, the arms deflect, and the first person to notice is usually a forklift operator. Indoff Canada treats cantilever installation as its own scope of work: we review the site before anything ships, set the runs out to the drawing, anchor to the slab, and plate the finished system for the configuration it was actually built to. We install the systems we supply, and we install and reconfigure cantilever racking that came from somewhere else.
What a cantilever rack installation involves
Four stages, in this order. Skipping any one of them is where the problems start.
Site review and drawings
We measure the space, check aisle widths against the equipment that will actually work the rack, and look at the slab — thickness, condition, control joints, and any trench or pit locations. Cantilever bases are wide, and where a base lands relative to a joint matters. The output is a layout drawing showing run lengths, arm levels, base spacing and clearances, so everyone is working from the same numbers before steel arrives.
Delivery and staging
Columns, bases, arms and bracing are staged so the crew builds in sequence instead of sorting steel mid-install. On a live site that is usually the difference between a clean day and a disruptive one. We schedule around your operation, including evenings and weekends where an aisle cannot come out of service during production.
Erection, plumbing and anchoring
Bases are set on the line, columns plumbed, bracing pulled square, and the system anchored to the slab per the drawing — every base, not every second one, with shims where the floor is out. Arms are then set to the levels on the drawing, and the rating is checked against the arm length and spacing actually being used.
Load plating and handover
The finished run gets a capacity plate reflecting the configuration as built, not the configuration on the order. If arm levels moved during install, the rating moves with them. We walk the run with you at handover and flag anything worth watching — a soft spot in the floor, a base sitting close to traffic, a column that is going to want a guard.
What we install
Roll-formed and structural, indoor and outdoor, new steel and reconfigured used systems.
Roll-formed cantilever
- Lighter-duty runs for lumber, trim, pipe, tube and sheet goods
- Bolted arm connections, adjustable up and down the column
- Single- and double-sided configurations
- Quickest to reconfigure when the product mix changes
Structural cantilever
- Heavier loads, longer arms, and impact-prone aisles
- Bolted structural columns, bases and arms
- Preferred where forklift contact is a routine risk
- The normal choice for outdoor and yard applications
Outdoor and yard runs
- Pipe, bar stock, lumber and extrusion stored outside
- Finished for weather exposure, and often roofed
- Anchoring reviewed against the pad, not just the rack
- Drainage and slope considered at layout stage
Installing to code
Three things an inspector or an insurer looks at first.
Anchoring and the floor
Anchor type, embedment and edge distance all follow the slab, and a base sitting near a joint or a saw cut is a different problem from one in the middle of a bay. Where the floor cannot take the rack as drawn, that gets raised before the install, not after.
Arm capacity and deflection
Arm rating drops as arm length grows, and the number on the plate has to match the arms actually fitted. Some deflection under load is normal — visible sag is not, and usually means a level was changed without the rating being rechecked.
Bracing and column ties
Cantilever runs rely on brace sets between columns to stay square and to share load along the run. Missing or loosened bracing is one of the most common findings on inspection, and one of the cheapest things to put right.
After it is in: inspection and maintenance
Cantilever racking takes more incidental contact than pallet racking, because it is loaded from the side and the columns sit in the aisle.
What to walk quarterly
- Anchors — loose, backed out or missing
- Base plates — lifted, cracked grout, shifted off the line
- Columns — still plumb, and free of twist or dents from contact
- Arms — bent, dropped a level, or pinned incorrectly
- Brace sets — loose bolts, deformed members, missing hardware
- Capacity plate — still legible and still matching the build
What is a repair, not a note
- Any visible bend or kink in a column or an arm
- A base that has moved, or anchors that will not re-torque
- Deflection that does not recover once the arm is unloaded
- Damage at the foot of a column near an aisle end
Damaged cantilever components get repaired or replaced, not straightened. If a walk turns up something structural, we quote the repair as its own scope — see rack inspection and repairs.
Cantilever rack installation questions
Do you install cantilever racking you did not supply?
Yes. We install new systems we quote, and we install and reconfigure cantilever racking that came from elsewhere, including used systems being relocated. What we need first is the make and the configuration, so the finished run can be rated correctly.
Does cantilever racking have to be anchored?
Yes. A cantilever rack carries its load off-centre from the column, so the anchors are doing real work rather than just holding position. Every base gets anchored, and the anchor spec follows the slab and the load rather than a default.
Can cantilever racking be installed outdoors?
It can, and it is a common way to store pipe, bar stock and lumber in a yard. Outdoor runs are normally structural, finished for weather exposure, and often roofed. Anchoring gets reviewed against the pad it is going on, which is frequently the limiting factor rather than the rack itself.
How much aisle does a cantilever run need?
It depends on the equipment and the product. Arm length sets the load depth, base depth sets the footprint, and the aisle has to suit both the truck and the length of what is being handled — twenty-foot bar stock is a different aisle from eight-foot sheet. We size it at layout stage against the equipment you actually run.
Do we need a Pre-Start Health and Safety Review?
Sometimes. It depends on the configuration and how the racking is used, and it is worth confirming before the install rather than after. We can walk you through what applies and coordinate the review.
Can arm levels be changed after installation?
Yes, and that adjustability is one of the reasons to choose cantilever. But moving arms changes the load rating, so the capacity plate has to be updated to match the new configuration. Reconfiguring without re-rating is how a compliant rack quietly becomes a non-compliant one.
See cantilever rack systems and configurations → · Pallet racking installation →
Planning a cantilever installation?
Send us what you are storing, the lengths and weights, and a rough footprint. We will come back with a layout, an installed price, and what the floor needs to do.