Metal B deck, also known as metal floor deck or simply B deck, is a type of structural decking material commonly used in the construction of buildings, particularly in commercial and industrial settings. It is typically made from steel and comes in various profiles and thicknesses to suit different structural requirements.

Here are some key characteristics and uses of metal B deck:

Structural Support: Metal B deck is used as a structural component to support concrete slabs in buildings. It provides a stable platform for the concrete to be poured onto, forming the composite floor system.
Corrugated Profile: B deck typically has a corrugated or ribbed profile that adds strength and rigidity to the deck. This profile also helps in providing lateral support to the concrete slab.
Load-Bearing Capacity: The load-bearing capacity of metal B deck varies depending on its thickness, profile, and the spacing of the supporting structural members (such as steel beams or joists). It is designed to support the weight of people, equipment, and other loads in a building.
Fire Resistance: Metal B deck is often chosen for its fire-resistant properties. It can help in providing fire resistance to the overall building structure when combined with other fireproofing measures.
Attachment to Structural Steel: B deck is typically attached to the supporting steel framework of a building using fasteners, such as welds, screws, or bolts.
Sizing and Thickness: B deck comes in various sizes and thicknesses, allowing it to be customized to meet specific structural and load requirements. The choice of deck thickness is influenced by factors like span length, loads, and building codes.
Application: Metal B deck is commonly used in multi-story buildings, warehouses, industrial facilities, and other structures where a durable and load-bearing floor system is required. It is often used in conjunction with concrete to create composite floor systems.
Finish: B deck can be coated or painted for corrosion resistance and aesthetics.

It's important to note that the specific details and properties of metal B deck can vary by manufacturer and region, so it's essential to consult local building codes and work with structural engineers and architects when designing and constructing buildings that use B deck as a structural element. Additionally, safety precautions and proper installation techniques are crucial to ensure the structural integrity of the overall building.