Heavy Duty Steel Gate Installation

I am welding a large two section driveway gate. Each gate is about 9-6" wide and 6' high for a 20' drivway. When I am finished with the gates, each gate will weigh 250-275 pounds.

In preparation for the gates, I have cemented a 6x6 square galvanised post 4' in concrete with a sub footing with rebar that is also 4' deep that runs the entire 20' length from post to post. The wall thickness of each 6x6 post is slightly less than 1/4".

I have purchased very heavy duty barrel hinges that will be welded to each gate frame. There will be 2 hinges per gate piece. I have also welded a 6x12" plate to the other end each hinge so that I can bolt the gates to the 6x6 metal posts.

Do you think the posts will sag when I go to bolt each gate onto each post. I was trying to avoid using any wheels on the end of the gates. I was hoping the post size in combination with the depth and width of concrete would keep the post from sagging even though each gate will weigh 250-275 pounds.

I appreciate any advise.

 

I don't THINK they can sag, given the depth of your footing and the size of the posts. Sounds almost like a bit of overkill to me, but if it keeps the gates from sagging, it's worth every extra dollar you are pouring at it!!

 

the question is whether the gate itself will sag -

 

I've hung 500 pound gates, with less support than you have. You're good to go!