Metal deck is a steel framing system that works well in the construction of roofs and floor slabs. This type of decking is made up of corrugated sheets of metal with different designs – either wave-like patterns, rooves or ridges. The varying shapes of the metal produce a variety of strengths that help it to function as a strong and durable frame for these structures.
The most common use of metal deck is in the roofing industry. The deck is often supplied with the steel package in new construction or can come into play during a re-roofing project when the existing roof has been damaged beyond repair. When contractors are looking to build a roof with a structurally sound and cost-efficient design, the use of a metal deck is a smart choice.
Besides its durability, a metal deck is also more attractive than other framing materials. Its manufacturing process ensures consistent joints, avoiding the need for joist hangers and can even be shaped to create eye-catching designs for a more modern look to a home. Additionally, it is much more resilient to severe weather climates and moisture, and doesn’t require any treatment against mold or termites.
A major benefit of using metal deck is its ease of installation. The material is supplied pre-cut to size and can be laid out quickly on the construction site. This allows other work to be carried out unhindered while the concrete is being poured and results in a quicker construction process.
Another significant advantage of metal deck is its ability to span far greater distances than other types of floor slabs. This is due to the ribbed design of the decking, which produces different load and diaphragm values. This means that the steel can be used for a larger area and still provide the same strength and support.
The metal deck can be topped with a concrete slab which is pumped on to form a composite floor slab. This helps to reduce the amount of concrete required without compromising the overall slab strength and fire performance. The ribbed design of the metal decking inhibits longitudinal slip between the concrete and steel, as well as transverse movement between the slab and the supporting beams.
In many cases, the shear studs that are fixed into the ribs of the metal deck are also designed to act as a reinforcing element within the concrete. This further increases the composite action between the concrete and the steel, making the slab stronger and more durable.
A leading multideck manufacturer -Kingspan – offers metal deck with shear studs integrated into the profiles. This increases the composite action and shear capacity of the slab.
When a building project calls for the use of a metal deck, it is important to consult the engineer to know what specific profile and gauge of steel to use. Knowing the exact requirements will ensure that the correct decking is supplied and installed, helping to keep the structure safe from collapse and ensuring compliance with the appropriate codes.