[TheForge] Gate Sag Problem

Tue Feb 4 08:58:01 2003

I like to have my hinges bolt to the gate or to the column. That way you can
shim the hinge to lift the gate if the column moves. Bob
----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Tuesday, February 04, 2003 7:25 AM
Subject: Re: [TheForge] Gate Sag Problem


> First of all, GREAT GATE!!!
> Regarding the dreaded column lean problem.
> All my Civil Engineering buddies tell me to use half the total height for
depth of a column under ground, especially with a heavy cantilevered load.
>
> Estimating the height of the column as between 10 - 12 FT they might point
to that as the problem.
>
> Your described solution, however sounds like it should provide significant
enough lateral support to avert further sag issues.
>
> >
> > From: mike wolfe <[email protected]>
> > Date: 2003/02/04 Tue AM 08:02:42 EST
> > To: "[email protected]" <[email protected]>
> > Subject: [TheForge] Gate Sag Problem
> >
> > While theforge was shut down this weekend I asked this question to the
> > artmetal people and got some good information.
> > Now that theforge is back on I would love to have your input!!
> >
> >
> > I have a stone, cement, and steel support column that is 24 in. x 24 in.
> > square and 12 ft. tall. It is supporting one side of a heavy gate, my
> > guess between 450 to 550 lbs.
> >
> > This is a free standing column and the base underground is 36 in. square
> > and 48 in. deep.
> > In the center of the stone column is a 6 in square tube x 1/4 in. thick
> > wall. There are three 6 x6 x 1/4 by
> > 9 inch long horizontal arms, welded to the vertical, there is a 8 in. x
> > 8 in. x 3/4 inch. plate welded to these three arms. The three barrel
> > hinges that support the gate are welded to the plates.
> >
> > The whole thing was then filled with cement including the steel tube
> > inside the column.
> >
> > I was out at the site last week and noticed that the spacing  was
> > getting closer at the top. This would indicate the dreaded gate sag
> > problem.
> >
> > Using a smart digital level  and a smart digital  protractor and  I have
> > determined that I an not getting the dreaded gate sage problem, "but"  I
> > am getting the dreaded column lean problem.
> >
> > The column is leaning towards the gate about 1/2 degree.
> > I wonder what will happen after all the frost heave this spring?
> >
> > I think I have figured out how to fix the problem by drilling through
> > the left column and adding plates and bolts and then drilling through
> > the very far left column. I would then put a turn buckle system in
> > between the the two columns, hidden behind the horizontal  bar with the
> > gold spikes on the "man" gate section. I then would connect a turn
> > buckle system to a steel post sunk into the ground behind the brick
> > retaining wall at very far left in the picture.
> >
> > Any comments would be greatly appreciated.
> >
> > I am placing a photo in photo access for theforge in the "work category"
> > named "Wolfe gate"
> >
> > Thank you
> > Mike Wolfe
> >
> >
> >
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