How Big & How Heavy

[DaveLindsay]

I need to get a log moved and I was wondering if there is some calculation I could use to determine how heavy a section of log would be. Is there a table out there with this sort of info on it. The log in question is a 3m length of Marri(red gum) about 60cm across.

 

[ChoppyChoppy]

Yes there are charts. The ones I have are for local woods, I'm sure same could be found on Google for your trees too.

 

[BobL]

I need to get a log moved and I was wondering if there is some calculation I could use to determine how heavy a section of log would be. Is there a table out there with this sort of info on it. The log in question is a 3m length of Marri(red gum) about 60cm across.

For WA tree species densities look here.
http://www.fpc.wa.gov.au/content_migration/native_forests/species.aspx

 

[Mad Professor]

I think the woodweb might have that information

http://www.woodweb.com/cgi-bin/calculators/calc.pl?calculator=log_weight

 

[Ryan'smilling]

Download the norwood app. It's pretty slick.

 

[BobL]

Some how I doubt any of those apps are going to have Western Australian Marri infi in them.

 

[Franny K]

Water is about 62 pounds per cubic foot. The metric equivalent should be pretty easy to search. If you test a small piece to see how high it floats then put a correction factor in to a volume of a cylinder formula. You first asked for a calculation.

 

[abbott295]

One milliliter equals one cubic centimeter equals one gram of water at a certain temperature (wasn't that maybe 4 degrees Centigrade (Celsius)?)
Therefore density of water in metric system is one kilogram per liter.

The metric "equivalent" was designed that way.

 

[Adamant]

Pi (3.14) * radius squared (metres squared) * length (metres) * density (kg/cubic metre)

= 3.14 * 0.3 * 0.3 (half of 60cm converted to metres and squared) * 3 * 1200 (green density for Marri listed at website BobL posted above, which by the way makes it heavier/denser than water like most freshly cut eucalypts, ie it sinks rather than floats until it has dried somewhat)

= 1017kg approx max (assuming the log was recently cut and not sitting in water and the 60cm was the fat end of the log)

 

[DaveLindsay]

Pi (3.14) * radius squared (metres squared) * length (metres) * density (kg/cubic metre)

= 3.14 * 0.3 * 0.3 (half of 60cm converted to metres and squared) * 3 * 1200 (green density for Marri listed at website BobL posted above, which by the way makes it heavier/denser than water like most freshly cut eucalypts, ie it sinks rather than floats until it has dried somewhat)

= 1017kg approx max (assuming the log was recently cut and not sitting in water and the 60cm was the fat end of the log)

Awesome thanks for that the log is pretty much 60cm all the way through.