architecture
away
building
business
construction
corridor
design
door
doorway
down
emergency
empty
entrance
escape
evacuation
exit
floor
glass
home
hotel
interior
ladder
landing
level
light
metal
modern
nobody
office
rail
railing
run
safety
school
sign
stair
staircase
stairs
stairway
stairwell
steel
step
structure
up
urban
wall
way
white
window
work