How the ancient Romans became the world's greatest builders

The expansion of one of the Mediterranean’s strongest powers wasn’t only driven by conquest, but also infrastructure. By ...

The world's tallest railway bridge is bigger than the Shard and cost £122m to build

The world's tallest railway bridge is bigger than the Shard and the Eiffel Tower.
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Pictured: World’s highest railway arch bridge ‘taller than Eiffel Tower’ opened in India

Indian prime minister Narendra Modi on Friday inaugurated the Chenab Railway Bridge – the tallest railway arch bridge in the world which is 35m taller than the Eiffel Tower. Towering at 359m above the ...
PBS

Arch Bridge: Forces

The arch is squeezed together, and this squeezing force is carried outward along the curve to the supports at each end. The supports, called abutments, push back on the arch and prevent the ends of ...