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Construction for Landscape Architecture by Jamie Liversedge, Robert Holden

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Rigid paving

Cast-in-place concrete, terrazzo, and unit paving laid on a concrete bed are examples of rigid paving. This tends to be more expensive than many flexible pavings. It is also difficult to dig it up for utilities trenches, so when using a concrete foundation do allow spare utilities ducts. Rigid construction is recommended for steep slopes (say, greater than 1:10), steps and ramps, places where pollutants should not be allowed to seep into the ground (such as gas-station forecourts) and some areas of high-impact loading. Rigid paving requires design for movement joints consequent on expansion and contraction of the material. Generally, such joints are provided at 20 foot intervals and should be carried through to the wearing surface. ...

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