issue with shackles?

[rb85]

https://www.vicroads.vic.gov.au/safety- ... aravanning

down the page a bit talks about D shackles. Its all bull as wooly said.

What's the load rating of a cable tie?

[Redhunter]

It's all bull, as has already been said.

[cheaterparts]

https://www.vicroads.vic.gov.au/safety- ... aravanning

down the page a bit talks about D shackles. Its all bull as wooly said.

from the above Vicroads paper
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Do I need a load-rated shackle to connect my safety chain/cable?

Whilst using a load-rated shackle isn’t mandatory, it’s a good idea to choose a shackle to suit your trailer and towing vehicle.

Suitable shackles include:

shackles supplied as original equipment by the original vehicle manufacturer (e.g. Ford, Holden, Toyota etc.)
shackles supplied by an original equipment tow bar manufacturer
shackles that are rated and compliant with Australian Standard AS 2741 “Shackles” or other equivalent recognised standards AND the break load limit of the shackle is rated at least 1.5 times greater than the Aggregate Trailer Mass (ATM) of the trailer (see below for example).
Recommended shackle/trailer ratios

Trailer ATM
Shackle Rating (break load limit at least 1.5 times ATM)
750 Kg 1125 Kg
1000 Kg 1500 Kg

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there are so many ways to look at this problem - and none add up -- first try to find anything in the ADRs on shackles it only has ADRs on safety chains and nothing on the shackles

here are the ADRs for safety chains

8. SAFETY CHAIN(S)
8.1. There must be affixed to a substantial portion on every trailer which is
not fitted with an ’Emergency Brake System’ in accordance with the
Australian Design Rule 38/... “Trailer Brake Systems”, and on every
rigid ‘Drawbar’ ‘Pig Trailer’ except a ‘Converter Dolly’, a safety
chain(s) which will hold 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 table for the chains wouldn't copy off the site but the are no ratings for under 2.5 tonne ATM and from 2.5 T to 4.3 T the chain must be 7.1 mm HT chain rated to 6.4 t Breaking and there is no table for shackles

so as a guide Vic roads says the shackles should have a breaking limit at least 1.5 times the trailer mass

1/4 inch rated shackle is rated 1/2 a tonne -- this is the working load limit ( not it's breaking limit but safe to lift things with ) it is quite normal for this to have a Max proof load of double that and of cause being a lifting rating has a max ultimate strength of 6 times the WLL or 3 tonnes
this is of cause the safety margin that has to be put into a lifting rating

so one 1/4 inch ( 1/2 tonne rated ) shackle is double the recommended weight shackle for a 1000 kg ATM trailer at 3 tonne breaking

as for mild steel cheapy shackles ( none rated ) it's a bit of anyones guess how strong they are but again theres no mention of them in the ADRs

now isn't hat all as clear as mud

[smile0784]

So after reading all the info im more confused.
So if i have 2 chain can i get away with 1 ton shackle on each chain or do i need more?

[Nude up]

The problem is when some police man interprets the rules his way some belive if they are not yellow pins they are not rated shackles try arguing with him at the side of the road.

[smile0784]

Thats my problem.
The 1 ton shackle from bcf has yellow pin.
If i need to use rated 1.5ton shackles i need to modify the car befor the trip not half way to qld

[Nude up]

My boat weighs 2.6 tonnes less fishing gear my shackles are 2t rated never had an issue

[smile0784]

Thats my problem.
The 1 ton shackle from bcf has yellow pin.
If i need to use rated 1.5ton shackles i need to modify the car befor the trip not half way to qld

[Stewy]

If you can use 1T shackles , then that's good enough .
http://www.tmr.qld.gov.au/~/media/Safet ... .pdf#page6