I have the key, but the front door does not open

"The key turns, but the door doesn't open."

I was contacted late in the evening.The client came home and turned the door key as usual, but said that the door wouldn't move.He says he suddenly fell into this state, but wasn't there really a sign?

Certainly the door doesn't move a millimeter.It feels fixed.It is a detached entrance with two push-pull door handles on the top and bottom.However, the upper side is U1 and the lower side is UX.It's a tiny combination, but it seems to have been this combination since it was newly built.I feel sorry for you.

The spacing of the door frame is fine, but the cause is completely unknown. The situation continued that there was no improvement even after 30 minutes.

Return to the origin and check the door gap again.I didn't think so, but I was worried about the bulge of the strike.

There is no gap between the door and the smoke guard.Apparently, the smoke guard and the strike plate were digging into it.This strike was a part that didn't fit this door, but it seems to have been used from the beginning.Therefore, with my understanding, I left it as it was without any particular replacement.