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Author Topic: Concrete base for sawmill  (Read 7919 times)

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Offline doc henderson

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Re: Concrete base for sawmill
« Reply #40 on: September 18, 2021, 07:15:26 AM »
it is always dangerous asking for advice with things like pouring concrete.  even my buddy Eddie who has done it for 40 years, will waffle on certain "rules" for no apparent reason.  so the piers could be a mixed blessing.  can transmit forces on the pad down to solid ground below the frost line, and make everything more solid.  If the whole pas settles, the concrete may crack there.  If you have a 3,000 pound log on a 1,000 pound mill, that is 2 tons, and divided that into the square inches of surface on the pad.  many jack have what seems to be a 2 x 4 inch foot (prob. more)  if there are 6 of these jacks supporting the mill, then 6 x 8 is all the weight on 48 sq. inches or 83 pounds per sq. inch.  you could also put a chunk of wood under each jack say 12 x 12 and now you spread out the forces and reduce to 4.6 pounds per sq. inch.  if you will be dropping and scooting large logs, this will impart some dynamic forces as well in addition to the static force.  you have all kinds of options.  you can form a slab that is 4 inches in the interior, with a 6 inch thick edge for a foot reinforced with rebar like a beam or mass footing.  a simple 4 inch slab with some wire roll mesh in it is much better than what you currently have.  I have what you have at this point.  If you have well compacted soil, you can dig the holes for the footings, and pour it all in one pour.  it is only time and money. ;) :)
timberking B 2000, 277c track loader, PJ 32 foot gooseneck, 1976 F700 state dump truck, JD 850 tractor.  2007 Chevy 3500HD dually, home built log splitter 18 horse 28 gpm with 5 inch cylinder and 32 inch split range with conveyor 12 volt tarp motor

Offline doc henderson

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Re: Concrete base for sawmill
« Reply #41 on: September 18, 2021, 07:20:12 AM »
On the tires, unless they are suspended off the ground, then they are sharing part of the weight.  my jacks and tires are all in line,  I am liking the thicker edge with rebar along the edge better and better,  I think that is what I would do.
timberking B 2000, 277c track loader, PJ 32 foot gooseneck, 1976 F700 state dump truck, JD 850 tractor.  2007 Chevy 3500HD dually, home built log splitter 18 horse 28 gpm with 5 inch cylinder and 32 inch split range with conveyor 12 volt tarp motor

Offline 2308500

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Re: Concrete base for sawmill
« Reply #42 on: September 18, 2021, 10:01:39 PM »
4 piers dug down 3 feet below grade  and 6 inch pad with rebar and wire mesh. overkill.....maybe...maybe not

 

Offline thecfarm

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Re: Concrete base for sawmill
« Reply #43 on: September 19, 2021, 05:23:59 AM »
overkill? you will never know.  ;)
overkill has made me feel better about a build many times.  ;D
Model 6020-20hp Manual Thomas bandsaw,TC40A 4wd 40 hp New Holland tractor, 450 Norse Winch, Heatmor 400 OWB,YCC 1978-79


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