Is this against fire code??

This is where i work. These are pictures all taken on different days. This is an almost daily occurrence. People have tripped over boxes and gotten injured. Manager doesn't care and said it was our fault for tripping. (Picture 2) We are carrying large heavy trays/ objects out of the kitchen (photo 2). This is 1 of 3 exits to the building. One fire exit (not pictured) is locked from the inside and outside because management doesn't want customers entering and exiting from there. Picture 1&3 is the entrance for employees/ deliveries, i have frequently tripped walking in the door to work, we also do side work in this hallway and trip because there is sometimes very little space. This is united states