Document ID: chunk:federal_register_of_legislation:F2006L03054:body:0:p6
Version: federal_register_of_legislation:F2006L03054
Segment Type: other
Provision Reference: 
Character Range: 18035–20004

in tow the trailer in the event of failure or accidental detachment of the 'Coupling'.
8.2.                                    A rigid 'Drawbar' 'Pig Trailer' which has a 'Aggregate Trailer Mass' of 2.5 tonnes or more must be fitted with 2 safety chains for connection to the towing vehicle.
8.3.                                    Safety chains must be permanently attached to the trailer. Shackles are not permitted. The point(s) of attachment to the trailer must be as near as practicable to the 'Coupling' and where 2 points are required they must be mounted one on either side of the 'Drawbar'.
8.4.                                    The specification for the safety chain:
8.4.1.                              for a trailer of less than 2.5 tonnes 'Aggregate Trailer Mass' must comply with clause 8.4.4 or 8.4.5.
8.4.2.                              for a trailer of 2.5 tonnes or more but not exceeding 3.5 tonnes 'Aggregate Trailer Mass' must comply with clause 8.4.5 or 8.4.6.
8.4.3.                              for a trailer of more than 3.5 tonnes 'Aggregate Trailer Mass' must comply with clause 8.4.6.
8.4.4.                              the provisions of Australian Standard 1872-1976 "Safety Chains for Trailers and Caravans" . Where attachment is by welding, the weld must extend around 50% of the circumference of the link and the adjoining link must have free movement.
8.4.5.                              the provisions of Australian Standard AS 4177.4 1994 "Safety Chains up to 3500 kg capacity".
8.4.6.                              be made from 800 MPa breaking stress and conform to the mechanical properties of Grade T chain as specified in Australian Standard 2321-1979 "Short Link Chain for Lifting Purposes (non calibrated)"; and must be of a size corresponding with the 'Aggregate Trailer Mass' of the trailer shown in Table 1. Attachment must not involve welding or deformation.

[*] The category code may also be in the format L1, LA etc.