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#236 RAAC: The Misunderstood Material?

RAAC, or reinforced autoclaved aerated concrete, enabled a boom in public building in post-war Britain. It allowed schools, hospitals and other services to be built

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#131 Cranes: How to Plan a Lift

Modern construction cranes are highly optimised. They’re designed to lift as much as possible, as far or as high as possible, while being able to