Why is it crucial that Class B bulkheads are constructed of non-combustible materials?

Class B bulkheads are required to be constructed of non-combustible materials primarily to enhance fire safety and ensure compliance with regulations. The primary function of these bulkheads in a marine environment is to act as fire barriers that restrict the spread of fire and smoke from one compartment to another, thereby locating and containing a fire more effectively. By using non-combustible materials, the integrity of the bulkhead is maintained under high heat conditions, minimizing the risk of structural failure and further engagement of flames.

This is particularly important in ships, where the close quarters and the nature of the materials used in construction can significantly increase fire risk. Non-combustible materials are specifically chosen because they do not contribute to fire growth; instead, they help to protect the vessel and its occupants by buying time for firefighting efforts and evacuation. Compliance with fire safety regulations is also a critical factor, as authorities require adherence to standards that govern firefighting measures on maritime vessels to minimize risk to life, cargo, and the environment.

While aesthetic guidelines, construction costs, and design flexibility may be factors in construction decisions, the paramount concern in the context of Class B bulkheads is the necessity for effective fire prevention and safety measures.