Thread: Log tongs vs snug chain

Originally Posted by Woody

To calculate the weight of you log you can use this formula. Radiata weight is approx 1 tonne per cubic metre.
Lets assume your log is 3 metres long and 90cm diameter.
Measure diameter in metres. I.e. 0.9metre.
Halve this to obtain radius. I.e. 0.45metre.
Square this and multiply by 3.142 and then multiply by the log length in metres.
0.45*0.45*3.142*say 3 metre length = 1.9 cubic metres = nearly 2 tonnes..
You need ropes, pins and strops, shackles and rings etc EACH OF WHICH NEED TO BE AT LEAST TRIPLE THAT FOR SAFETY RATING. I.E. 6 TONNES EACH rating.

Radiata is about 450-500kg per cubic.Oak would be about a ton a cube...
Ground resistance is the biggest enemy in this case,just to get a log moving on flat ground without lift you have to apply 130% of the logs weight to get it moving.Uphill + ground resistance = a whole lot more.