Technical Engineering

Net Area

Gross area reduced to account for removed material.

Nominal Strength 

Strength of a structure or component (without the resistance factor or safety factor applied) to resist load effects, as determined in accordance with this Specification.

Out-of-Plumb Ratio 

Maximum horizontal distance (in inches) from the centerline of the column at the floor to a plumb line that extends downward from the centerline of the column at the top shelf elevation, divided by the vertical distance (in feet) from the floor to the top shelf elevation.

Overturning Moment

An applied force that causes a structure to turn over.


A person who purchases and/or directs the use of a pallet rack. Note: While the interests may not always be the same, in the context of this Guide the terms “owner”, “user”, “purchaser”, or designates of any of them (such as a consultant) have the same meaning

Pallet Beam

The front and back shelf members that bear the weight of the load and transfer the load to the upright frames

Pallet Load Support Member

Any load bearing member with the long axis on the horizontal plane, intended to support unit loads in direct contact (i.e. pallet, shelf supports and beams but not bracing).

PDF (Portable Document Format)

Printable forms are author protected and cannot be modified by the recipient.

Portal Test

A test designed and conducted to determine the connection moment-resisting capacity and the rotational rigidity “F” of a beam-to-column connection. The test setup employs two column segments and one beam segment connected to one another, using two beam-to-column connectors forming a portal frame, with the load applied laterally in the plane of, and to the corner of, the portal frame in the direction parallel to the beam segment.

Professional Engineer

A person registered or licensed to practice as a professional engineer within a provincial or territorial jurisdiction of Canada.  Note: Where local laws or regulations applying to pallet racks specifically define the term “professional engineer” that definition prevails.


Pre-Start Health & Safety Review

Safety Factor 

Factor that accounts for deviations of the actual strength from the nominal strength, deviations of the actual load from the nominal load, uncertainties in the analysis that transforms the load into a load effect, and for the manner and consequences of failure. The nominal load divided by the safety factor results in the allowable load for an allowable strength design.  An allowance is included in the rated capacity of a pallet rack component, to permit a momentary overload condition (e.g. during the placing of a loaded pallet onto a beam), without causing an immediate failure.