My shower does not have that metal framing and lip yours has. Door swings above tile step in. The metal door sweep is very narrow with tracks for water drainage. What is interesting is it is high, I can slide my finger under it. Behind that metal sweep is a rubber sweep like one puts on a front door. I've never had water on the floor. The one you show looks like an ankle slicer to me with that rough corner. I'm sure someone with sound knowledge will help you out.