Forgot expansion joint

[Poe]

Hi,
I started a garden wall a couple years ago and not sure if I should have put in an expansion joint.
The wall is 4 inch blocks on the flat, I left it just below ground level and put expansion joints every 6 meters.
However at the corner I didn't place an expansion gap so effectively there is 6 meters to the corner (90deg approx) then 6 meters out from the corner.
Or 12 meters of wall length with a corner in the middle with only expansion gaps at each end.
Does this require an expansion gap/movement joint and if so how close to the corner should it be and its it ok to start a new joint when the lower section of wall below ground level doesn't have the joint in it too foundation level?

Thanks.

 

[^woody^]

You don't see expansion joints on any semis. How long/wide are those?

 

[Poe]

Thanks for the answer woody.
I figured I had (when I started when I started the wall) decided I didn't need any here.
Needed to ask though as can finally get back to finishing the wall and I noticed a small crack in the mortar about a meter out from the corner which I put down to settlement, which I'm hoping won't continue once the wall is completed.
Poe.

 

[^woody^]

Expansion cracks are vertical, and normally through the masonry units too.

If you are minded to form an expansion crack, then it could go in a corner, so that the longer section of wall moves past the other [smaller] section.

 

[Poe]

I'll have a dig down the side of the crack to establish the type of crack.
The ground is made up from spoil I believe and has a lot of clay in it so pretty sure it'll be a settlement crack.