Require the distance between the fire escape on the first floor and the door of the building.

0.9 meters. Code for Fire Protection Design of Buildings requires: 5.5.30 The total net width of doors, exits, evacuation walkways and evacuation stairs of residential buildings should be calculated and determined, the net width of doors and exits should not be less than 0.90m, the net width of evacuation walkways, evacuation stairs and the first-floor evacuation outer doors should not be less than 1. 10m, and the building height should not be greater than one side of residential buildings.