accident
alert
assembling
background
barrier
black
building
caution
construction
danger
dangerous
engineering
equipment
estate
exterior
forbidden
halt
hazard
health
house
icon
illustration
incomplete
industrial
infrastructure
interdiction
label
machinery
man
metallic
no
not
notice
prohibition
protection
regulation
residential
risk
roof
safe
safety
scaffold
scaffolding
security
sign
site
symbol
unsafe
warning
white