Which type of roofs should NOT be cut into during firefighting operations?

Cutting into roofs during firefighting operations is a crucial tactical decision, and certain types of roofs pose significant risks that make them unsuitable for this action. Gypsum, Q-Deck over Truss roofs are particularly sensitive because they can collapse unexpectedly, especially when exposed to fire conditions. These roofs often consist of lightweight materials that can fail quickly, leading to a dangerous situation for firefighters working above.

The risk associated with cutting into a Q-Deck over Truss roof lies in the potential for premature structural failure. They typically have a lightweight design, including trusses and lighter decking materials, which are not able to handle the additional stress from both the fire and the weight of firefighters. If cut, these roofs can lead to rapid structural instability, increasing the risk of injury or death.

In contrast, steel beam roofs, while still requiring caution, are generally more robust and can often withstand the heat of fire without immediate risk of collapse. Wooden shake roofs, depending on their condition, may also be manageable to cut into with proper precautions taken. Asphalt roofs may be cut if necessary but are more often used for ventilation and may also have different fire behavior characteristics.

Therefore, understanding the material properties and structural integrity of roofs is essential in firefighting strategy, ensuring that firefighters