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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