When entering a commercial building you need to take into consideration that the roof may be carrying a heavy load.
Although the roof systems are designed to handle the added load under normal conditions, when attached by fire, these roof top units will come crashing down.
The time to find out about what’s on the roof is not during the fire, but during inspections and pre-planning visits. Get familiar with these buildings before it’s dark and smokey.
Stay safe and be careful.