Estimate the Weight of this log

[LD1]

Bet it didnt weigh what this one did... was all my buddys L4310 could do to roll it up the ramps. Red oak 30" @ the small end 16' long. Felt heavier than the L4310 judging by the how the truck and trailer handled... it was HEAVY.

30" @ 16' and assuming no taper at all....

= 78.5 cubic feet
at 60# per cubic foot, thats about 4700#

Thats a nice log. Since it is 16', does that mean you took it to a mill and not just diced for firewood??

 

[LD1]

I'm aware of that. Many times when de- rocking a field you can pry them out using the tilt pistons breakout force and flop them back into the bucket but then not be able to raise the loader arms. You end up sliding them to the edge of the field and off into the bushes. Here is one that was about all I could lift. My 553 loader will lift to full height 4000 and my rears are loaded.

I think rocks are very deceiving. Especially if granite.

I have no clue what this piece of granite weighs, but it was big to lift...

 

[SPYDERLK]

I think you'll be surprised.
Formula would be pi*r*r*L*lbs/cu ft
Roughly = 3.14*1.5ft*1.5ft*29ft*lbs/cu ft = 204.885 cu ft * lbs/cu ft

Oak weighs roughly 62 pounds per cubic foot wet, and about 46 pounds air dried.

So we're looking at about 9,424.71 to 12,702.87 pounds for that log, or 4.7 to 6.2 tons.

That's a bit more than I can snake out of the woods with my CT230, even with chains on the tires. I'd have to cut the log in half.

I didnt see anyone post about a 36" diameter log that was 29' long So what log are you talking about??

Yes. The subject log is conical not cylindrical, and is effectively way less than 24" major and 12" minor dias as shown by the pictured measurements. The 29' length meas shown is reaslistic for the calc. The others must be fudged downward.
larry

 

[LD1]

Yes. The subject log is conical not cylindrical, and is effectively way less than 24" major and 12" minor dias as shown by the pictured measurements. The 29' length meas shown is reaslistic for the calc. The others must be fudged downward.
larry

Not to mention he was figuring for a 3' log. The log in question is only 2' diameter tapering off to a 1' diameter.

Certainly not 3' diameter and no taper at all.

 

[CDN Farm Boy]

I think you'll be surprised.
Formula would be pi*r*r*L*lbs/cu ft
Roughly = 3.14*1.5ft*1.5ft*29ft*lbs/cu ft = 204.885 cu ft * lbs/cu ft

Oak weighs roughly 62 pounds per cubic foot wet, and about 46 pounds air dried.

So we're looking at about 9,424.71 to 12,702.87 pounds for that log, or 4.7 to 6.2 tons.

That's a bit more than I can snake out of the woods with my CT230, even with chains on the tires. I'd have to cut the log in half.

Yup, surprised for sure. You got the formula right only to input the average diameter into the radius fields, then you didn't realize that the chance of the tractor lifting 3 times it's own weight is pretty slim.

Try it again like this: 3.14*.75*.75*29 = 51.22 cu ft @ 62 lbs/ft = 3175 lbs

 

[LD1]

Using the average diameter is still incorrect. All though close enough for guessing the weight of a log that isn't perfectally tapered or round. And using average diameter is normally how I guess. But the correct formula for truncated cone will give a slightly higher volume.

 

[dieselcrawler]

30" @ 16' and assuming no taper at all....

= 78.5 cubic feet
at 60# per cubic foot, thats about 4700#

Thats a nice log. Since it is 16', does that mean you took it to a mill and not just diced for firewood??

Yup... went to the local log yard. It and another, the next section up the tree, about 8' long. Had been down about a year and a half, starting to go bad... short log brought more than the 16'er. About $480 for both. Not bad for a half days work... logs were given to us, were right beside the road already down and cut, and loaded easily.

 

[94BULLITT]

You can get scrap steel "drops" from a manufacturing / welding shop -- cheap. Use that as filler inside the cement to up the weight. If you can get old tire weights those are even better.

I'd like to get hooked up with a welding shop to get some drops. My neighbor is supposed to hook me up with some from the place he works. I have done so little jobs for him for metal and welding rods:laughing:

I think you overestimated the size.
The calculator is for a uniformly tapered log and I think without bark.
After you get past the few lower feet of "butt swell" what was the diameter? 22"?

I cant try to see how big it is past the but swell.

I think the weight guesses are high too.

I didnt use a "wood calc" but the volume of a truncated cone is as follows:

[(pi x H)/12] x (R^2 + Rb + b^2)

where H is height (or length in this case)
R is big diameter
b is small base diameter

So...[(3.14 x 29')/12] x (2'^2 + 2*1 + 1^2)
......[91/12] x (4+2+1)
......[7.59] x (7)
= 53.13 cubic feet of wood

From what I could find, green pin oak is 63# per cubic foot

So thats 3221#

BUT WAIT, water is 62.xx pounds per cubic foot. I am betting that wood aint 63#. I certainly dont think that log would sink??

Dry pin oak is 44# /cu ft.

I am betting it is somewhere in between. Maybe 55# for a log weight of about 2900#

Still a nice lift though. But I certainly dont think it is anywhere near the 3625# estimates. That would put it weighing about 6# per cubic foot heavier than water.

An easy way to test: chuck a piece in water and see if it sinks?

If I could get the moisture content of the wood would that get a closer estimate? If not I can throw a piece in water.

Bet it didnt weigh what this one did... was all my buddys L4310 could do to roll it up the ramps. Red oak 30" @ the small end 16' long. Felt heavier than the L4310 judging by the how the truck and trailer handled... it was HEAVY.

That looks heavy.

There's a piece of oak there? I was too busy staring at that good lookin grapple!!

There was even a tractor in the picture.

That is one nice looking piece of Oak!
It will stink (not terribly bad) a little bit while you are burning it, but you will get used to it. Did you get about 1.25 cords out of it?

I cut a log 12'6'' long out of it and the rest is firewood. I'll stack it and see how much firewood I got. I could also estimate the weight of by using a cord wood weight calculator and then what the 12'6'' log weighs. We have a lot of pin oaks around here.

True, but the lift rating is to full height rather than down low where the log is in the pictures. The max lift to 24" would be far higher than to max height, so it's possible he could lift 3,500lbs+ to that height.

The lift capacity at 1.5m at the pins is 3097lbs. I would have liked to have seen how high it would lift it but I did not want to roll the tractor.

 

[Looking4new]

I took a look at the pin oak growing area. Fairly large area.

 

[94BULLITT]

An easy way to test: chuck a piece in water and see if it sinks?

I just tried a piece, it barely floats.