Anchor on ground for TreeGuying

[Grigory]

Prompt please: how to make an anchor on ground for TreeGuying. A tree: an inclined birch, height 70 ft, DBH=24 ". A Diameter, in a point of an attachment guyi -15" at height of 35 ft.
The large and heavy tree.

Should I make the concrete block by the size 4 õ4 õ4 of ft?

Or it is enough to dig in ground, on depth 5 ' a steel pipe long 10 ', it is perpendicular guyi?

 

[Treeman14]

http://www.duckbill-ground-anchors.co.uk/frameset2.htm

 

[John Paul Sanborn]

I would consult an engineer on what size "deadman" anchor you need (tyhe burried anchor you describe.

For the laod you wish to hold you may need several poured concrete anchors.

 

[Franz]

Your nearest Graybar Electric warehouse can get you the utility type anchors, if they don't have them in stock.
Depending on soil type, a 16" anchor with a 3/4" rod is capable of 10,000 pounds of pull when installed 8 feet deep.

 

[John Paul Sanborn]

Frans, the guy is in Moscow I doubt they have that chain over there .

 

[Franz]

Aw geez JP I gotta get some of them trifocular vision modifiers and learn to read the fine print.
Probly ain't got any old Bell Telephone manuals over there in Russia either, so suggesting a hunk of railroad rail and a trench probably wouldn't help him either.
Now, I gotta hunt up the magnifier glass ao I can call the optometrist instead of the obstetrician.

 

[Grigory]

The large thank for the answers.
Has found here (duckbill-ground-anchors) the table, from which has understood, that the holding force of an anchor depends on properties of a ground and effective area of an anchor. At the size of an anchor of 60 inches õ 5 inches moving together force a minimum (if an anchor not in a bog) = 50000 pounds