How to install the security door?

You will be held responsible for improper acceptance of civil engineering.

It has been required to use solid bricks around the door hole to firmly fix your security door, and now the security door is loose, and the solid brick masonry of the door hole must have quality problems, and there is a hollow, so the security door is loose.

If the civil construction of the door opening is within the scope of your work, you will assume this civil construction responsibility.

Is the hole too deep, in this case you can pour some cement slurry below to the height of a mounting hole.

It has nothing to do with the opening direction, mainly because the wall is hollow, and there is no grouting, which should be negotiated with the builder.

Isn't it made of bricks all around? The door you are talking about should be an inside opening and an outer edge. Didn't you use an expanded snail???

Generally, it is a punching and screwing expansion screw. If it doesn't work, make the hole bigger, then pour cement slurry into the hole, and put the expansion snail in. Wait for the second point to dry before tightening.

That should do the trick.