MD146 is therefore a direct alternative to precast concrete slabs, with the added benefits of faster installation times and, potentially, more cost-efficient builds. Just as with MD60 and MD80, Multideck MD146 can be installed on the top flange of the structural steel frame and does not require ASB beams to provide support. Multideck MD146 is the longest spanning deck on the market capable of achieving spans of up to 6m unpropped. The profile is available with a gauge of between 1mm and 1.2mm delivering economic composite slab solutions.įire performance of 1 hour is possible with a 140mm slab depth, however up to 4 hours can be achieved depending on the deck/concrete ratio.ĭownload the MD80 data sheet. Multideck MD80 is an 80mm deep trapezoidal profile that can deliver longer 5.4m unpropped spans. Up to 4 hours fire performance is achievable with other slab depth combinations.ĭownload the MD60 data sheet. With a 130mm concrete slab depth, MD60 can deliver 1-hour fire performance. MD60 also has the most efficient concrete section of all of the Multideck profiles requiring up to 20% less concrete. The profile has a gauge range of 0.9mm to 1.2mm. This delivers spanning of up to 4.5m unpropped. MD60 is a 60mm trapezoidal profile that provides an excellent composite union between the steel deck and concrete. The original and most frequently specified steel deck on the market for composite beam design is Kingspan Multideck MD60. Other combinations can offer fire performance of up to 4 hours.ĭownload the MD50 data sheet. The minimum concrete slab depth achievable when using Multideck MD50 is 100mm, and this combination offers a fire performance of 1 hour. The deck can deliver spans of up to 4 metres unpropped and is available in a gauge range up to 1.2mm. This enables the profile to achieve a best in class load capability. Kingspan Multideck MD50 is a 50mm dovetail rib profile steel deck capable of maximising the bond between deck and concrete due to its shape and to shear keys on the flange and webs of the ribs. Let’s take a look at each multideck steel decking profile in detail: Multideck MD50 Marketed as ‘Multideck’, the high-performance steel decking is available in five different profiles and offers span widths of up to 6 metres. Kingspan is a leading manufacturer of profile steel decking and produces 9,000 tonnes of steel deck each year. The combination of deck and concrete slab thickness can also influence the composite concrete floor system’s fire rating. The depth of the profile influences factors such as load capacity, unpropped span capability and the thickness of an in situ concrete floor slab. Deeper decks are called trapezoidal and are used to achieve longer spans. Shallow profile steel decks are generally referred to as dovetail or re-entrant and are most commonly specified for short spans. The steel deck is shaped during manufacture into different profiles ranging from 50mm to 206mm deep. Steel decking, or metal deck as it is also known, is a sheet of steel with a gauge of between 0.9mm and 1.5mm. Together, the composite concrete floor slab provides greater load bearing capabilities and improved fire performance than either material used in isolation. Kingspan Multideck being installed on a steel frame buildingĪnother element which can also be beneficial to budgets is the specification of composite concrete floor systems alongside steel frame.Ĭomposite concrete floor systems comprise of profiled steel decking onto which is cast an in situ concrete floor slab reinforced with either steel mesh or steel fibres. And, fewer materials equates to reduced material costs and an overall cheaper build. Whilst the cost of steel frame construction is project specific and heavily influenced by the build programme, site access, required internal building spans and the overall design steel boasts the highest strength to weight ratio of any construction material and is capable of creating a stronger building with far less material than one built of concrete. Buildings such as schools, hospitals, shopping centres and distribution warehouses are often constructed using steel frame. Steel frame construction is not a new concept and now accounts for over 70% of non-domestic construction in the UK. As construction costs, and people’s expectations, increase there is a requirement for buildings to be erected quickly and to be as sustainable and cost efficient as possible.
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