Installing 6 X 6 Posts 8ft Above Grade

jimmyofc

going to install some 6 x 6 posts in the ground and going to cement in the ground 4ft below the grade to hold up a scoreboard for a golf course 4ft in height by 16ft in length anyone know what the proper length of how much of the post should be below grade?

Magnettica

What the frost level out there in Port Jeff?

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jimmyofc

3ft

JonM

Why are you going to use concrete?...use ground contact PT lumber, not the stuff you buy at the box store. Put the posts in 36" and tamp it as you fill the hole.

Lubs

We have done some pole buildings and we were told not to cement the pole either because the wood shrinks and then water can get trapped between the cement and wood and accelerates the rot even though it is treated. We used gravel and packed it worked great.

Greg Di

I think you are pissing into the wind. Why?

Because I installed a scoreboard (smaller) yesterday as a matter of fact.

It needs to be engineered unless you don't care about someone getting killed when the wind blows it over.

Look:

http://picasaweb.google.com/FineHome...eat=directlink

Note the BIG STEEL BEAMS. Note the REALLY DEEP HOLE. Note the BIGGEST SONOTUBES YOU EVER SAW. Note the WELDED REBAR CAGES.

Take it for what it's worth, but don't plead ignorance.

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WarnerConstInc.

Holy Crap Greg, what a pain.

By the way, was that jimmy hoffa in that hole?

Magnettica

Damn, that's some set up.

Hoffa was buried at Giants Stadium everyone knows that.

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MALCO.New.York

Doin' it and doin' so one can sleep without EVER thinkin' about it!!!

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woodchuck2

Nice job Greg . Most folks dont realize how much stress gets exerted on a sign due to the wind. Your job may be some overkill but at least you can sleep at night. Well said Malco.

HitchC&L

Yea, a scoreboard is a giant parachute, get a good wind and an improperly designed sign, your gonna have a show.

Make sure its designed right

bob_cntrctr

Depends on what you mean by "6 x 6 posts 8ft above grade ...going to install some 6 x 6 posts in the ground and going to cement in the ground 4ft below the grade to hold up a scoreboard for a golf course 4ft in height by 16ft in length " - that's kind of convoluted.

If you mean the top of the posts, and therfore the top of the scoreboard, are 8ft above grade, then I'd point out that everyday guys on this board erect 8-foot tall and 30, 40, 50-foot wide scoreboards on 4x4 posts sunk 4-feet into the ground every 8-feet apart - they're called fences, and they stand just fine.

But if the bottom of the scoreboard is 8-feet off the ground, and the board is 4-ft by 16-ft, that's a whole other ball game. Now you've got a 12-foot moment arm.

TimelessQuality

The moment would be 10'... Good Point!

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jimmyofc

posts are gonna be 6 x 6 acq post cements into the ground in 12 inch forms with 1/2 inch rebar installed into the cement, a total of 4 posts with the top of the posts being 8ft off the grade, it will be 3 sections 2 - 4ft, and 8ft in the middle with the 2 ends being at a 22 degree angle off the center panel