• Covered Cantilever Rack

  • Structural Cantilever Rack

Designing Cantilever Rack Systems

Cantilever racks can be either Single-Sided or Double-Sided depending on space and capacity. The following are guidelines used in designing cantilever racks. Once you've reviewed these guidelines, please use our quick and easy RFQ to submit your requirements.

A Cantilever Rack has the load carrying arm projecting from a single column, and is supported on one end only. Cantilever Racks have no front post or columns along the aisle, therefore, optimizing space utilization and allowing immediate access to your inventory.

A. Arm - Adjustable 4” on center in multiples of 4” from floor: Arm pitch approximately 3/4” per foot.

B. Base - Base length equals arm length or longer. Base height equals column depth.

C. Column - Single sided has base and arms on one side only. Double sided has base and arms both sides. Holes 4” on center on both sides. Column type equals column depth in inches.

VB. Vertical Brace - Rigid, pre-punched and factory welded, for bolting to bracing clips.

HB. Horizontal Brace
(not shown) - Pre-punched for bolting to brace clip.

AP. Arm Pole
- Retains load on arm

BP. Base Pole
- Bolts to arm and accepts pole

EC. End Cap
- Optional soft plastic protective cap softens impact and minimizes injuries.

PS. Pole Socket- Retains load on base



Determine how many arms are required to support your load. Base this on the maximum lateral spacing of arms (due to load rigidity or weight) 
and in conjunction with the Arm Capacity Chart shown below. Individual arm capacity is determined by dividing "the total load weight" by "the number of supporting arms." Arm length equals the depth of your load. Arm capacities are based upon uniform loads.

Determine the number of load levels per upright considering:

  1. Maximum lift capabilities of your fork lift truck.
  2. Unobstructed vertical space available.
  3. Subtract the base height from the maximum
 lift height. Divide this height by the sum of: (one load height + 5” clearance + the height 
of one arm). This will equal the number of loads below the top arm that can be stored within the lifting capabilities of your truck. Check for unobstructed vertical space, if adding one more load height exceeds vertical space available, reduce arm levels by one.

*Arm capacities are based upon uniform load.


Lateral stability and spacing of the Uprights is accomplished with Vertical Brace Panels and Horizontal Brace Angles.

Vertical Brace Panels as shown, are required in each end bay of any row, and in alternate interior bays, i.e. bays 1, 3, 5, etc. in rows with an even number of bays, two adjacent bays will need vertical brace panels. For exterior application, contact Anderson Building Materials. Factory positioned bracing clips will properly position the braces.

*Upright heights showing position of required bracing in inches.
To ascertain bracing required for in between sizes, select next larger size.

Determine the Upright capacity by multiplying the desired number of arm levels by the capacity of the selected arms. A load can be stored on the base, however, this load is not included in the Upright capacity.

The minimum total Upright height is equal to:

  1. ŒTotal number of arms per side multiplied by the individual arm height, plus...
  2. Space between the arms
 (load height plus 4” - 6” clearance) multiplied by the number of spaces, plus...
  3. ŽBase height, plus...
  4. 4” minimum above the top arm. 
If you want the upright to be a back support for the top load, add in the desired height.

*Upright capacities shown are for single side only, not including the base. Double these for double sided uprights. For additional sizes and seismic ratings, contact Anderson Building Materials Company by phone 269-983-5543 or email .


The distance between uprights determines the bracing width. If you have two arms under your load the Brace Panel would be one-half the load length, three arms under the load would be one-third the load length.


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