Timber weight and m3

[Dave Martin]

Cheers, very helpful. I wonder how many people will write this down.

 

But obviously this is not `logged` wood with air space.

[THE88MAN]

u be suprised how heavey pine is freshley felled just how i seen it written down mate

i know all the years i sent lorries away with large scotch and corsican i was always surprised how they got their weight with big sawlogs,lorry looked half full,just surprised twice as much beech would be the same weight.i usually reckon about 30 cubic feet of beech to the ton so sounds about right

[slasherscot]

hope this some use as there is a lot of different ideas people have about weight and m3 it from foresters companion book my bible oldschool:001_smile:

 

softwood green weight cubicmeter weight conversion

pine=m3=1.98 tonnes

 

larch=m3=1.20 tonnes

 

dougfir=m3=1.15tonnes

 

spruce=m3=1.04tonnes

 

Hardwood green weight cubicmeter conversion

Beech=m3=0.97 tonnes

 

Ash=m3=1.28 tonnes

 

oak=m3=0.94 tonnes

 

Average weight of seasoned timber 15%moisture content

pine=m3=600kg

 

larch=m3=500kg

 

dougfir=m3=500kg

 

spruce=m3=400kg

 

hardwoods

Beech=m3=720kg

 

Ash=m3=700kg

 

0ak=m3=740kg

 

u made some mistake there mate.........

 

green pine oak and beech are much the same around 1 cubic metre to 1 tonne

 

green stika 1 cubic metre is around ..........0.97 tonne

[Stephen Blair]

i would love to see what holly is or yew is.

[jensma]

website with densities of different varities of wood incl. holly

 

Wood Densities

[David oakman]

Hi ben, i will have to go and get my foresters companion out and look this up really good info and helpful:001_smile:

[Ben Ballard]

hi david the greenweight figures was from the third edition of N.D.G james the foresters companion that i borrowed of the old woodsman i own the forth edition cost me a small fortune of £90 as out of print that had the 15%moisture chart forth edition didnt have any mention of the green weight,a real shame there is no books as good as this any more

[David oakman]

Yes mine is the by N.D.G.JAMES but i can't see which edition it is but the date is 1955 and it cost me £1.20:thumbup1:

[b101uk]

hi david the greenweight figures was from the third edition of N.D.G james the foresters companion that i borrowed of the old woodsman i own the forth edition cost me a small fortune of £90 as out of print that had the 15%moisture chart forth edition didnt have any mention of the green weight,a real shame there is no books as good as this any more

 

Because it was wrong in the third edition maybe or you are interpreting it wrong

 

Is green pine ~2/3 water or only ~200kg lighter than dry concrete, I think not

 

If standard density is 1 = 1000kg per 1m3 then the green figures could be a division factor of 1 / X = Y * 1000 = Zkg

 

“pine=m3=1.98 tonne”

 

1m3= 1 / 1.98 = 0.5085kg = 505.8kg per 1m3

(600kg dry)

 

“larch=m3=1.20 tonnes”

 

1m3 = 1 / 1.20 = 0.8333 = 833.3kg per 1m3

(500kg dry)

 

“dougfir=m3=1.15tonnes”

 

1m3 = 1 / 1.15 = 0.8695 = 869.5kg per 1m3

(500kg dry)

 

“spruce=m3=1.04tonnes”

 

1m3 = 1 / 1.04 = 0.9615 = 961.5kg per 1m3

(400kg dry)

 

 

“Beech=m3=0.97 tonnes”

 

1m3 = 1 / 0.97 = 1.0309 = 1030.9kg per 1m3

(720kg dry)

 

”Ash=m3=1.28 tonnes”

 

1m3 = 1 / 1.28 = 0.7812 = 781.2kg per 1m3

(700kg dry)

 

“oak=m3=0.94 tonnes”

 

1m3= 1 / 0.94 = 1.063 = 1063kg per 1m3

(740kg dry)

 

if you then look at it the “pine=m3=1.98 tonne” vs. “1m3= 1 / 1.98 = 0.5085kg = 505.8kg per 1m3 (600kg dry)” is the only figure that falls short of dry weight due to the “1.98” being an error.

[Joy Yeomans]

these are the figures weve used when processing hardwoods for firewood, especially beech into log form - people think you can get more than 1 - 1.5 cubic metre per tonne but you dont when youve logged it all up. - i think some of the people whove bought in timber at 26 tonne lorry loads will soon realise its harder to achieve those margins as they think theyll get more cube out of it.