What is this written on several buildings in red paint? Walking down the street in Tianjin I see this:



My question is: what does it say, and what does it mean?

It's written in red paint on several buildings that I walk past.  The same thing is written maybe 4 or 5 times.

I tried to translate it using search by radical and handwriting recognition, and this is all I managed:

外?空裂
请勿停?
注意安全


It says something about mind your safety, and don't park here (?).  I'm not really sure.
外檐空裂

请勿停靠

注意安全

“ the outer eaves are missing and broken

please not park alongside

watch out for safety”