Cantilever racks carry heavy, long loads on open arms, which makes correct loading, anchoring, and inspection essential to keep people and inventory safe. This guide covers the practical safety rules and the standards that apply to cantilever racking in Canada.
The Standards That Apply in Canada
- CSA A344 — User guide for steel storage racks / design and construction of steel storage racks. The Canadian standard governing the design, installation, use, and inspection of steel storage racks, including cantilever systems.
- ANSI MH16.3 (RMI) — the North American specification specifically for the design, testing, and use of industrial steel cantilever storage racks. It defines how arm and column capacities are rated.
- Provincial occupational health & safety law (for example, Ontario’s OHSA) and the building code govern workplace safety and seismic and structural requirements for installed racking.
Buying racks engineered to these standards — and keeping the rating documentation — is the foundation of a safe system.
Load Capacity: Know and Post Your Limits
- Every cantilever system has a rated capacity per arm and per column, based on arm length and load placement. Capacity drops as load moves toward the arm tip.
- Post load-capacity plaques on each system and never exceed them.
- Distribute loads evenly across arms; avoid concentrating weight at the arm tip or on one side of a double-sided rack.
- Account for the heaviest realistic load, not the average.
Proper Installation Is a Safety Issue
- Anchor bases to the floor with the specified anchors and embedment for your slab.
- Ensure the floor is level; shim where required so load distributes evenly.
- Verify the slab thickness and condition can carry the base loads.
- Use trained installers — incorrect base sizing, anchoring, or bracing is a leading cause of cantilever failure.
See our cantilever rack installation page for our full engineered process.
Safe Loading & Daily Use
- Train operators on rated limits and correct forklift handling of long loads.
- Keep aisles clear and maintain safe forklift approach angles.
- Use inclined arms or end stops for pipe and round stock that can roll.
- Report and tag any contact damage immediately — do not keep loading a damaged upright.
Cantilever Rack Inspection Checklist
Inspect on a documented schedule — many facilities run monthly visual checks plus a formal annual inspection:
- Columns plumb and not leaning
- Arms straight, not bent or deflected beyond limits
- No cracked welds at arm-to-column and base connections
- Anchor bolts present, tight, and undamaged
- No forklift impact damage to bases or columns
- Load plaques present and legible; loads within rating
- Loads evenly distributed; nothing overhanging unsafely
- Floor around bases sound (no cracking or spalling)
- Bracing intact and fasteners tight
Damaged components should be unloaded and replaced before the rack returns to service.
Frequently Asked Questions
How often should cantilever racks be inspected?
Conduct routine visual checks (commonly monthly) plus a formal documented inspection at least annually, and immediately after any forklift impact. Follow your manufacturer’s and CSA A344 guidance.
What standards apply to cantilever racks in Canada?
CSA A344 covers steel storage racks generally; ANSI MH16.3 (RMI) is the cantilever-specific design specification. Provincial occupational health and safety law and the building code also apply to installed systems.
Do cantilever racks need to be anchored to the floor?
Yes. Cantilever bases must be anchored per the engineered design to resist tipping and load forces. Anchoring is integral to the rated capacity.
What causes cantilever racks to fail?
The most common causes are overloading, loading too far toward the arm tip, forklift impact damage left in service, poor anchoring or uneven floors, and using damaged components.
Can a damaged cantilever arm be repaired?
Bent or cracked arms should be unloaded and replaced, not field-repaired, unless the manufacturer specifies an approved repair. Replacement restores the rated capacity.
Need cantilever racks engineered and installed to standard? Request a quote from Indoff Canada. Related: Cantilever Racks and Cantilever Rack Installation.
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