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• 19:01, 15 September 2022 Cort talk contribs created page Drain Sizing (Created page with "__NOTOC__ ---- “Adequate drainage should be provided under floor slabs for spillways and stilling basins to reduce uplift pressures. For soil foundations, a drainage blanket under the slab with transverse perforated pipe drains discharging through the walls or floor is generally provided, supplemented in the case of stratified foundations by deep well stems. Drainage of a slab on rock is usually accomplished by drain holes drilled in the rick with formed holes or pipes...")