What are these brackets I found while starting Demo in a condo?

[Eric Perez]

Started demo in a condo and ran into these metal brackets under the carpet at the front end of the unit. I have a couple of questions:

Does anyone know about the purpose for these?

What are potential reasons for this crack in the corner?

How can I properly install LVT with these to consider?

Appreciate any input. Thanks. 

[Michael Gessner]

@Eric Perez that's what I was thinking, however that's not requires here in the northeast, I wonder if the condo is prefab and maybe they used these brackets to anchor the exterior walls to the foundation rather then bolts. Either way unfortunately I dont think you can remove them. In terms of lvl flooring, you'll have to build up around them and allow your floor to feather into the height of them