page_title: Adrian Long
section_title: FlexiArch
hierarchical_section_title: Adrian Long / FlexiArch
caption_attribution_description: English: Teewell Hill bridge widening
context_page_description: Adrian Long OBE is a British civil engineer. A professor at Queen's University Belfast, he has a particular interest in concrete structures and has patented FlexiArch, a pre-cast concrete arch product. He served as president of the Institution of Civil Engineers for 2002-03, the first Northern Irish engineer to do so.
context_section_description: From 1997 Long worked on the FlexiArch, a pre-cast concrete arch in which the individual voussoirs are joined by a flexible polymeric membrane. The arch arrives to site flat packed and when lifted into position by a crane the gaps between the voussoirs close under gravity and form the correct arch profile.  Long patented the product, which is produced by Irish pre-cast manufacturer Macrete, in 2004.  The product can be constructed within a day and, containing no corrodable elements, has been stated to have a design lifespan of 300 years.  More than 50 FlexiArch bridges have been constructed in the UK and Ireland and spans up to 30m are possible.
caption: A FlexiArch bridge constructed adjacent to an existing structure in Soundwell, Gloucestershire
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