Fence Post on top of concrete footing

[PermaChanged]

I need to install a fence post, however I know the position I'm looking to put it in has a concrete footing beneath for a perpendicular wall that juts out from the main house to form a flat roofed entrance area. The top surface of that footing I highly doubt to be at the 600mm depth I want to bury the fence post which leads me to figure out the best way to proceed. I'm looking to hang a 1m wide gate off this post.

I believe I've got two options;

Drill some 8mm holes in to that footing, drive in some rebar and post-crete the fence post in place on top of the original footing - using the original footing as support. I'd then need to cut the top of the fence post to suit the height of the rest of the fence. Con to this, likely won't have full 600mm of post buried in the ground.

Core drill a big old hole in the footing, kango it out, and sit the fence post at the correct depth, and backfill with postcrete - seems the smarter option, but could prove a PITA to achieve.

What are your thoughts?

 

[Mercenary Keyboard Warrior]

Can you bolt it to the wall you mention?

 

[PermaChanged]

Should have mentioned that I don't think it's a possibility to mount to it.

That wall will be double battened (vertically followed by horizontal to allow air movement behind) and then composite cladded.

 

[Mercenary Keyboard Warrior]

Are the foundations decent?
If so I would be tempted to go with a bolt down postholder in that case.
Such as

https://www.ironmongerydirect.co.uk/product/taurus-bolt-down-fence-post-shoe-quick-fit-75-x-75mm-galvanised-143954?vat=1&GSP=true&gad_source=1&gclid=CjwKCAiA8YyuBhBSEiwA5R3-Ex3pefUeDLrsWp7TjkJ4QCMRlf0437epmFl0I78GTEI9Vwfl_dxPbRoC-ZgQAvD_BwE

 

[cuke2u]

Are the foundations decent?
If so I would be tempted to go with a bolt down postholder in that case.
Such as

https://www.ironmongerydirect.co.uk/product/taurus-bolt-down-fence-post-shoe-quick-fit-75-x-75mm-galvanised-143954?vat=1&GSP=true&gad_source=1&gclid=CjwKCAiA8YyuBhBSEiwA5R3-Ex3pefUeDLrsWp7TjkJ4QCMRlf0437epmFl0I78GTEI9Vwfl_dxPbRoC-ZgQAvD_BwE

That's what I'd do if possible...

 

[ci_newman]

Are the foundations decent?
If so I would be tempted to go with a bolt down postholder in that case.
Such as

https://www.ironmongerydirect.co.uk/product/taurus-bolt-down-fence-post-shoe-quick-fit-75-x-75mm-galvanised-143954?vat=1&GSP=true&gad_source=1&gclid=CjwKCAiA8YyuBhBSEiwA5R3-Ex3pefUeDLrsWp7TjkJ4QCMRlf0437epmFl0I78GTEI9Vwfl_dxPbRoC-ZgQAvD_BwE

That was my first thought too, however mountings like that don't really suit a heavy 1m width gate hanging off it. As the post shrinks and grows through the year, the gate will sag in almost no time at all.

 

[PermaChanged]

Well that was an absolute chore! Spent half a day getting just one fence post up - a 12inch concrete footing was not fun to try and kango through with a small breaker without much reach from SDS Plus chisels. Definitely needed a harder hitting and longer SDS Max!

There was only about 150mm of soil before hitting the top of the footing, and spent the next few hours breaking away and clearing out the hole - ran out of time, so the rest of the fence will have to wait until next weekend - I'm hoping the footing for the boundary on the other side of this run is less sturdy.