A Complete Guide to Metal Decking: Strengthening Your Construction Projects
17th December 2024 What Is Metal Decking?
Metal decking, also referred to as steel decking, includes all types of metal sheeting that can be combined with concrete to create robust floor and roof systems. Its high strength-to-weight ratio makes it a highly efficient material, cutting down on both erection and material handling costs. Metal decking is ideal for multi-storey, steel-framed buildings such as office blocks, hospitals, schools, bridges, and car parks.
How Is Metal Decking Used?
Metal Floor Decking
Metal floor decking is used to form floors that support wet concrete. Installed over steel joists or beams, the metal decking provides the essential framework for the concrete, which then cures into a tough and durable composite floor deck. This system is ideal for stabilising the frame of a building, creating working platforms for multi-storey construction, and offering a stay-in-place form for pouring concrete.
Key applications for metal floor decking include:
- Stabilising building frames
- Creating platforms for multi-storey builds
- Serving as a base for composite floor decking systems
- Providing mezzanine-level flooring
Composite Concrete Floor Slab
A composite concrete floor slab is formed by combining metal decking with in-situ reinforced concrete. The decking sheets are trimmed to size, laid between the beams of a metal structure, and secured in place with shear studs. After applying mesh grid reinforcement, concrete is poured to create a strong, durable slab. This composite system offers cost and time benefits, making it a popular choice in multi-storey construction.
Metal Roof Decking
Metal decking is also used in roofing applications. Installed over steel beams or joists, it serves as a durable platform for roofing materials, insulation, waterproof membranes, and lightweight concrete. Metal roof decking supports the weight of the roof system and provides a sturdy base for mezzanines or steel canopies.
Typical uses for metal roof decking include:
- Providing roof support for buildings
- Creating mezzanine levels
- Constructing steel canopies
Advantages of Metal Decking
Metal decking has gained significant popularity in recent years due to its range of benefits, especially in the construction industry. Here are some key advantages:
Low Weight
One of the most important benefits of metal decking is its strength-to-weight ratio. Metal decking is lightweight yet incredibly strong, reducing the need for heavy supporting structures like props, which are typically required for heavier materials. By using lighter materials, you can also reduce the size of the foundations, leading to substantial savings on excavation and foundation work.
Reduced Costs
By reducing the weight of a construction project, metal decking allows you to cut costs on materials, supports, and reinforcements. This can free up your budget for higher-quality materials elsewhere in your project. Furthermore, the amount of concrete required for reinforcements can be reduced by up to 25%, which also contributes to cost savings.
High Strength
When combined with concrete in composite slabs, metal decking significantly improves the strength of the structure. This results in better load-bearing capacity and increased durability over time, leading to fewer breakages, repairs, and maintenance. The reduced weight also means smaller foundations, which can further lower costs.
Easy Handling and Installation
Metal decking is easy to handle and install. It can be pre-cut to your specifications, making it non-intrusive to the rest of the construction process. Once on-site, it can be spread out and used immediately as a working platform, saving time and increasing efficiency. Installation is straightforward, with minimal preparation and expertise required compared to other building materials.
Common Questions About Metal Decking
1. Is Metal Decking Good for Slabs?
Yes, metal decking is highly effective for creating slabs. It provides superior structural strength compared to traditional concrete slabs, thanks to its high strength-to-weight ratio.
2. How Thick Is Metal Decking?
Metal decking thickness varies depending on the specific requirements of your project. Metal thickness is measured using sheet gauge, with larger gauge numbers indicating thinner sheets. Typically, metal decking ranges from gauge 16 and upwards, with the appropriate thickness selected based on the structural needs of the project.
3. How Much Weight Can Metal Decking Hold?
A well-designed metal decking system can support around 240kg per square metre (50lbs per square foot). However, this can vary depending on the decking profile and design, so it's always important to follow the recommended weight load limits.
4. What Is the Standard Size of Metal Decking?
The standard size of metal decking typically ranges under 1 metre (40 inches) wide for shipping purposes, but the actual size may vary depending on project specifications.
5. How Far Can Metal Decking Span?
On average, metal decking can span between 3 – 4.5 metres (10 – 15 feet) for standard profiles. For a dovetail profile, the span can extend up to 6 metres (20 feet).
Why Choose LGW Group for Your Metal Decking Needs?
When it comes to construction projects, whether for commercial, industrial, or residential applications, our bespoke metal decking services at The LGW Group are designed to provide significant cost savings while enhancing the strength and durability of your build. Our experienced engineers work closely with you to deliver tailored solutions that meet the unique requirements of your project.
The LGW Group is one of the South's leading construction specialists, bringing together experts in metal decking and other essential building materials. With a proven track record and years of experience, we are committed to delivering exceptional results on every project we undertake.
To learn more about how our metal decking services can strengthen your construction project and help reduce costs, don’t hesitate to get in touch with us today. Call us on 0117 958 2090 or complete our online contact form for a personalised quote.