Door not closing in shipping container workshop

[woodman-46]

Hello,
I have a shipping container that I use as a workshop. I based it on solid 1m3 concrete blocks on each corner for extra stability. Up to about a month ago the door closed fine but now it won't and there is a wider gap at bottom on opposite side of hinges than at the top. Basically it seems about 1cm out of line from top to bottom. I have tried jacking the left side of container up thinking that might right this but no luck.
Does anyone out there have any ideas or experience in this please ?
I am attaching some photos..The second photo shows top of door with no gap and the third photo shows the bottom of door with a gap.
Thanks

 

[freddiemercurystwin]

Have you tried jacking it up beneath the latch side of the door?

 

[Ivor Windybottom]

Getting back to basics, are the hinge screws tight?

 

[^woody^]

Check the diagonals of the container to see which way it's flexing, and which if any corner has moved.

And the door opening, it may just be a hinge issue.

 

[woodman-46]

Thanks for all your responses, much appreciated. I checked the hinges and it became clear that the plates had bent( probably door left open in the wind and it had forced them). I used my tractor jack between the door jam on opposite side of doorway to hinges and the door itself while open. A few pulls on the jack handle and the hinge plate went back to flat. Now door shuts properly.
Thanks again.

 

[Ivor Windybottom]

Good. Always start with the idiotic simple ideas before getting into the complicated stuff!