What type of roof requires the use of an aerial platform for ventilation?

An arch or dome roof typically requires the use of an aerial platform for ventilation due to its unique structural design and height considerations. These roofs often have a rounded or curved shape that can make accessing the upper areas more challenging compared to flat or pitched roofs. The elevation provided by an aerial platform allows firefighters to effectively ventilate the space underneath the arch or dome, facilitating smoke and heat removal while ensuring the safety of personnel during operations.

In contrast, flat roofs can generally be accessed more easily by firefighters using ladders or other means, and gable roofs have two sloping sides that typically allow for effective ventilation without specialized equipment. Pitched roofs, while also sloped, can be addressed in some cases without the need for an aerial platform, but they do pose their own challenges in terms of access and safety. Therefore, the aerial platform is essential for safely reaching the high and often intricate structures of arch or dome roofs during ventilation operations.