I thought of all the poorly built roof structures around my area and started looking for images of poorly constructed roofs around the country. The intent is to give a sense to other firefighters potential problems in framing that could make venting even more dangerous. The thread is the most viewed on the site currently.
Here are a few examples
Big Spacing, Small Lumber, and the dreaded nail plates
That isn't a pile of wood, it is a roof.
Ok, we have a fire on the roof and we need to vent. How long is this roof lasting?
Check out pages of poor construction over at Firefighter Spot