How to work out m3 of a round log.

[Celtictimber]

Brilliant many thanks for your help

[WeeDee]

Brilliant many thanks for your help

 

You're welcome.

 

Remember, that's a calculation for total volume.

 

It doesn't account for wastage as the hoppus formula does.

[Celtictimber]

Yea ok.

[difflock]

For some reason I use:

Pi * D * D / 4 for the area of a circle.

And using 3.0 for Pi, would both make for easier sums, and make some little allowance for saw kerf.

m

[wisewood]

Thanks for explaining that, think I've got it now

Is there a contemporary hoppus pricing guide for species of woods?

[John in Scotland]

You're welcome.

 

Remember, that's a calculation for total volume.

 

It doesn't account for wastage as the hoppus formula does.

 

also doesn't account for the gaps between each log.

cubic meter of wood isn't the same as a cubic meter of split logs.

 

as I'm sure you ae aware.

 

but you did say from the customers point of view?

[WeeDee]

For some reason I use:

Pi * D * D / 4 for the area of a circle.

And using 3.0 for Pi, would both make for easier sums, and make some little allowance for saw kerf.

m

 

Pi * D * D / 4 = area

I can't make this work unless D is always 2. Pity, because it very tidy!

 

 

 

" And using 3.0 for Pi, would both make for easier sums, and make some little allowance for saw kerf."

I think this is a great idea! I would like to see how it actually compares to a real situation. Nice one.

[difflock]

Pi * D * D / 4 is the same as Pi * r * r

 

Pi * D * D / 4 wus wot we wus taught at the Poly on the C Eng course.

Perhaps because pipe sizes etc were/are always specified by their diameter

 

4*4/4=4

or 2*2=4

 

6*6/4=9

or 3*3=9

 

8*8/4=16

or 4*4=16

Edited January 20, 2014 by difflock

[harvey b davison]

My head hurts

[WeeDee]

Pi * D * D / 4 is the same as Pi * r * r

 

Pi * D * D / 4 wus wot we wus taught at the Poly on the C Eng course.

Perhaps because pipe sizes etc were/are always specified by their diameter

 

4*4/4=4

or 2*2=4

 

6*6/4=9

or 3*3=9

 

8*8/4=16

or 4*4=16

 

Yes - I get it now. Sorry for my misunderstanding.

 

Nicely explained. Thanks.