Safety Chain Hooks

Trailer & Caravan Safety Chain Hooks

Couplemate™ exclusively stocks Austlift™ branded safety chain hooks because they have a Government-issued Component Type Approval (“CTA”) number. Our advice is to only use hooks that have a CTA number for safety and compliance.

Safety chain connections are tricky, as they must comply with two Australian Standards and one ADR. These are:

• AS3776:2015 – Lifting components for Grade T(80) and V(100) chain slings
• AS4177.4 – Caravan and light trailer towing components
• ADR 62/02 – Mechanical Connections between Vehicles

The hammerlock you require will depend on your Aggregate Trailer Mass (“ATM”). However, because hooks, hammerlocks, and shackles all fall under a different Australian Standard, these components will have a Working Load Limit (“WLL”) rating (not an ATM).

So, to work out the ATM, we must do a few calculations based on the Breaking Load Limit (“BLL”):

1. BLL = WLL x 4*
2. ATM = BLL / 1.5

* 4 to 1 safety factor.