Ribbed Slab Design Spreadsheets to Eurocode 2 (EN 1992-1: 2004)

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Ribbed and waffle slabs

Ribbed and waffle slabs provide a lighter and stiffer slab than an equivalent flat slab, reducing the extend of foundations. They provide a very good form where slab vibration is an issue, such as laboratories and hospitals.

Ribbed slabs are made up of wide band beams running between columns with equal depth narrow ribs spanning the orthogonal direction. A thick top slab completes the system.

Waffle slabs tend to be deeper than the equivalent ribbed slab. Waffle slabs have a thin topping slab and narrow ribs spanning in both directions between column heads or band beams. The column heads or band beams are the same depth as the ribs.

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Ribbed Slab Design Spreadsheets to Eurocode 2 (EN 1992-1: 2004)

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