Which type of material is typically used for constructing Class B bulkheads?

Class B bulkheads are specifically designed to withstand fire and restrict its spread between different compartments on a vessel. The primary requirement for Class B materials is that they must be non-combustible or have a limited combustibility, ensuring that they can provide effective fire resistance without adding to the flames or smoke produced during a fire incident.

Using non-combustible materials in the construction of Class B bulkheads is crucial for maintaining the structural integrity of a vessel during a fire. This type of construction helps to ensure that the bulkheads can withstand heat and prevent flames from transferring from one area of the ship to another, providing critical time for evacuation and firefighting efforts.

Other materials such as combustible materials, reinforced plastic, and wooden panels do not meet the stringent requirements necessary for Class B bulkheads, as they can easily catch fire, contribute to the spread of flames, and compromise safety aboard the vessel. Therefore, the selection of non-combustible materials is essential for achieving the fire protection objectives necessary in maritime safety regulations.