Rigging Glossary I–P: Canadian Lifting & Rigging Terminology Explained

Now that we’ve covered the foundational terms in Part 1 (A–H), it’s time to move into the terminology you’ll find in inspection reports, lift plans, and CSA documentation across Canadian job sites.

These are the words that show up when you’re tagging slings, reviewing hardware, proof testing gear, or discussing wire rope construction with your team. Understanding them isn’t just helpful — it’s part of working safely and professionally in lifting operations.

Welcome to Part 2 of our Canadian Rigging Glossary (I–P).

I

Inspection (Frequent vs Periodic) – CSA and provincial OH&S require both visual frequent inspections and documented periodic inspections of slings, wire rope, and hardware.

Inspection Tag – Identification tag showing WLL, manufacturer, and inspection status.

In-line loading – A load applied in a straight line through the centre of hardware without side loading.

IWRC (Independent Wire Rope Core) – A steel core within wire rope providing strength and crush resistance.

J

J-Hook – Hook shaped like the letter “J”, often used in transport securement and some rigging applications.

Jaw & Jaw Turnbuckle – A tensioning device with clevis ends used in static rigging and support lines.

K

Kink – A permanent deformation in wire rope caused by improper handling or shock loading; requires removal from service.

Knuckle Boom Crane – Articulating crane often mounted on trucks and used widely in Canadian construction and utilities.

L

Lang Lay – Wire rope construction where wires and strands twist in the same direction, offering abrasion resistance.

Load Binder – Lever or ratchet device used with chain for load securement per Transport Canada regulations.

Load Rating – Maximum load capacity assigned by the manufacturer.

Lug / Lifting Lug – Engineered lifting point welded or bolted to equipment or structures.

M

Master Link – The primary top ring in a multi-leg sling assembly.

Mechanical Advantage – Force multiplication achieved through blocks and reeving.

Mechanical Splice – Termination method using compression fittings instead of hand splicing.

N

NDT (Non-Destructive Testing) – MPI, dye penetrant, or ultrasonic testing used to inspect hooks, shackles, and lifting hardware.

Nominal Strength – The published strength of a component before efficiency reductions.

O

Overhead Lift – Any lift where the load passes over personnel; requires additional controls under OH&S.

Outrigger – Extendable support on cranes providing stability during lifting.

P

Pad Eye – Engineered plate with hole used as a lifting or tie-down point.

Pitch Diameter – Effective diameter of a sheave measured at rope contact point.

Proof Test – Controlled test load applied to hardware or slings to verify integrity.

Pulley (Sheave) – Grooved wheel guiding wire rope in hoisting systems.

Why These Terms Matter

These terms are foundational for lift planning, inspection documentation, and CSA compliance in Canadian workplaces.

Next up is Part 3: Rigging Glossary Q–Z, completing this comprehensive Canadian rigging terminology series. If you missed Part 1 A-H, click here.