One used to see a lot of gates with a little metal wheel under the swinging
end, indeed you could often see a track in the concrete where it was opened.
That seems to be a thing of the past now.
Brian

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On 05/03/2021 13:56, Scott wrote:
Our gate fell off the wall and I have now had it repaired by a welder,
who replaced the corroded steel post in its entirety. The gate is
perfectly level but the bolt is tight due to previous mislignment. It
may bed in with time.

However, if I want to replace the bolt what should I use? What is the
difference between a slide bolt and a barrel bolt? Can any type of
bolt be welded (by the welder) or is a particular design needed? Is
it worth paying extra for marine grade stainless steel given that the
cost of the bolt will will be insignificant compared to the labour?

Just ask any dog - they'll all make a bolt for the gate if you let them
:-)

More seriously, if the thing just binds a bit then it can't be difficult
to file or grind the pin to fit.