CPC Howlers (again)

jakethesnake:

stevieboy308:
Putting a twist in a strap does weaken it.

Try pulling a sheet of at apart from the middle, you won’t do it, pull it apart from the edge and you will. A 2m strap with a twist is 2m at the middle, both outer edges are slightly more due to the half a circle it’s covered too, do you end up with high tension on the outsides and a lower 1 in the middle, that not how they’re designed to work, DCPC dude is right

Thanks for the confirmation stevie, of course it does.

[/quote]
This from page 116 of the Spanset Load Control Guide :-

– Use only lashing equipment that is not
twisted when tensioning

It does not specifically explain why but then they are one of the biggest load control / safety harness people around.

spanset.com/uploads/au/Span … hapter.pdf

BUT…

Another manufacturer say this :-

Applying twists to your lashings
Another benefactor influencing the strength of the lashing is the number of twists in a lashing. In this particular case there were 5 twists per lashing over a length of 60cm (2ft). These twists resulted in a loss of over 500daN.

Often people like to apply one twist in the woven lashing to prevent flapping/rattling during transport. One twist in a longer length lashing does not have negative consequences on the strength.

cargorestraintsystems.com.au/wh … g-webbing/

They are both ozzie firms so might have got it all upside down :laughing: