Single Tree Volume Assessment

[TimberCutterDartmoor]

Quiz question:

 

Single JL tree, 23m high, 30cm dbh. Likely to yield 9 x 2.2m firewood / other products (down to no mimimum top diameter but typically 7cm and all measurements o/b).

 

What's the volume in the stick?

 

 

I have the blue book and can generally measure a stick by eye as it were; just wondering what others come up with

[slack ma girdle]

somewhere around .65 m3

[mattplace]

As a rough guess... 0.8m3??

[openspaceman]

What's the volume in the stick?

 

 

I have the blue book :

 

 

As do I, is that cheating?

[TimberCutterDartmoor]

NO the bb aint cheating; 0.6 is about right but if you do the mid diameter / roundwood method vs the top diameter sawlog method you do get a different result to the tune of 0.15m3; the log comes up higher...

 

sorry that's based on the approx 23m tree producing a 20m pole terminating at 7cm...

[openspaceman]

NO the bb aint cheating; 0.6 is about right but if you do the mid diameter / roundwood method vs the top diameter sawlog method you do get a different result to the tune of 0.15m3; the log comes up higher...

 

sorry that's based on the approx 23m tree producing a 20m pole terminating at 7cm...

 

Well then I got a tarrifr of 36 for JL which then corresponds to a volume of 0.76 at 23m and 30dbh.

[TimberCutterDartmoor]

Well then I got a tarrifr of 36 for JL which then corresponds to a volume of 0.76 at 23m and 30dbh.

 

agreed tariff of 36 but after that, I seriously struggle with tariffing tbh.

 

Where did you get 0.76 from? BB page #? My measurement was based on 4 x 5m logs with the following top dia: 24, 18.5, 12.75, 7... or roundwood of 0.452 plus 0.133 which comes up at 0.585. I'm deliberately being conservative because a higher volume off a job always trumps an over optimistic one.

 

Whoever measured the stand we're in now should have gone to specsavers!

 

edit re above tariff - basal area of 0.07? i.e ba = pi x dbh2 / 40000

 

= 0.07

Edited April 1, 2013 by TimberCutterDartmoor

[openspaceman]

agreed tariff of 36 but after that, I seriously struggle with tariffing tbh.

 

Where did you get 0.76 from? BB page #?

 

My edition is 1975 (first metric edition??) Table 69 p266 0.76m3 to 7.5cms top

[slack ma girdle]

agreed tariff of 36 but after that, I seriously struggle with tariffing tbh.

 

Where did you get 0.76 from? BB page #? My measurement was based on 4 x 5m logs with the following top dia: 24, 18.5, 12.75, 7... or roundwood of 0.452 plus 0.133 which comes up at 0.585. I'm deliberately being conservative because a higher volume off a job always trumps an over optimistic one.

 

Whoever measured the stand we're in now should have gone to specsavers!

 

edit re above tariff - basal area of 0.07? i.e ba = pi x dbh2 / 40000

 

= 0.07

 

I got a tariff of 30 from table 11 page 112, hence .65m3

[dangeroussteve]

Where can you buy the blue book?