Woof
Topic Author
Posts: 84
Joined: Tue Jul 21, 2009 9:00 am

Volumetric Weight - Perfect Goods

Wed Sep 15, 2010 3:08 pm

I've had to ship lots of things overseas through the years, and I've yet to ship anything whos weight and volume matched the carriers volumetric weight calculations. The items I've shipped have either been much heavier than their volumetric size, or much larger than their volumetric weight.

Today, for example, I've shipped some old cockpit panels from a 737. The package weighed just 2kg, but was 95x30x50cm in size, so I paid for a volumetric weight of 24kg.

So, I'm wondering what single material, generally, would create a volumetric weight of 1:1? I thought this might be water, which weights 1g per cubic centimeter, so 1kg of water would take up 10x10x10cm, but this equates to 0.5kg in volumetric weight... so I have no clue.

Anyone help?
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oly720man
Posts: 5801
Joined: Fri May 21, 2004 7:13 am

RE: Volumetric Weight - Perfect Goods

Wed Sep 15, 2010 3:59 pm

Quoting Woof (Thread starter):
Today, for example, I've shipped some old cockpit panels from a 737. The package weighed just 2kg, but was 95x30x50cm in size, so I paid for a volumetric weight of 24kg.

From this I get a "density" of 168.42kg/m^3 (= 24/(0.95*0.3*0.5))

So if you had a box that was 1m x 1m x 1m and weighed 168.42kg then you'd be at 1:1.

Ground cork has a density of 160kg/m^3

http://www.simetric.co.uk/si_materials.htm

so a large box full of bits of cork would probably do it. Not a single material I know, but something like cork will be there or thereabouts. Bulk density of cork is 240kg/m^3.
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petertenthije
Posts: 3357
Joined: Tue Jul 10, 2001 10:00 pm

RE: Volumetric Weight - Perfect Goods

Wed Sep 15, 2010 4:10 pm

Volume/metric weight is also dependant on the mode of transit and even the individual carrier involved. In road transport and ocean (LCL) a volume/metric of 333 KGs per Cu-M is most common in Europe. From what I hear from my US collegues, they usually calculate 250 KGs per Cu-M.

I do not know what the standard is for airfreight.


edited to add:

The reason that, in Europe, the default is 333 KGs is very simple: it's to max out a truck. A typical trailer will carry up to 24000 KGs and has a maximum capacity of 89 Cu-M ("tautliner": 13,6M x 2,45M x ~2,7M). However, with standard pallets you would normally end up loading a truck at ~72 Cu-M. Divide 24000 by 72 and you get 333.

[Edited 2010-09-15 09:19:59]
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Woof
Topic Author
Posts: 84
Joined: Tue Jul 21, 2009 9:00 am

RE: Volumetric Weight - Perfect Goods

Thu Sep 16, 2010 9:43 am

Thanks for the replies guys. The moral of the story for me is...

If you are shipping goods that are not the perfect weight / size combination, try and combine them with goods that make the total package as close to the ideal mass as possible. I'm sure this is 'sucking eggs' for those in the know, but it will save me some money in the future.
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petertenthije
Posts: 3357
Joined: Tue Jul 10, 2001 10:00 pm

RE: Volumetric Weight - Perfect Goods

Thu Sep 16, 2010 10:38 am

Quoting Woof (Reply 3):

If you are shipping goods that are not the perfect weight / size combination, try and combine them with goods that make the total package as close to the ideal mass as possible.

Yes, preferably without increasing the dimensions.

So if you got a big box of 1,0 Cu-M (Chg-Wght 333 KGs) that weighs 250 KGs, then you can in essence freely add ~80 KGs as long as the size of the box does not increase. So if you got some unused space in your box, you migt as well use it as your shipping price won't be affected. You might have some additional handling or customs costs, assuming they are charged in real KGs as opposed to Chg-Kgs, but that should be relatively small change.

Note: above example uses road / LCL weights. The chargeable weight for air might be different!
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