Spean Praptos is a nearly 1,000-year-old Khmer bridge in Cambodia—about 85 metres long, 14 metres high and built with 22 corbelled laterite spans without binder. The video argues that inward-sloping walls provide gravity support, a V-shaped channel aids drainage and sandstone facing protects a laterite core, likening the arrangement to modern rebar-and-concrete. The presenter estimates 23 feet of flood headroom, an eight-foot stain line, three times normal flood level and a roughly 90% laterite core; the cited sources do not confirm those figures or the construction analogy.
Ancient corbelled engineering at Cambodia’s Spean Praptos bridge
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📍 Spean Preah Chang-ae (Ancient Bridge)🌍 Show on the globe
Key facts
- Spean Praptos is a nearly 1,000-year-old Khmer bridge in Cambodia, about 85 metres long and 14 metres high, with 22 corbelled spans.
- The cited descriptions say the spans were built from laterite blocks without binder; they do not verify the claimed roughly 90% internal laterite core.
- The video argues that inward-sloping laterite walls provide gravity support and that a V-shaped channel promotes drainage and reduces stagnation.
- The video estimates about 23 feet of flood headroom, an eight-foot stain line and roughly three times the normal flood level; the cited sources do not establish those measurements.
- The sandstone-and-laterite arrangement and comparison with modern rebar-in-concrete are the presenter’s interpretation, not a documented construction explanation.
Sources
Oldest and longest corbeled stone-arch bridge - Asia Book of Recordsasiabookofrecords.com
The nearly 1,000 years old bridge is 85 metres long and 14 metres high. The bridge has 22 spans, all built of laterite without any binder. It is ...
Corbel arch - Wikipediaen.wikipedia.org
The Arkadiko Bridge is one of four Mycenean corbel arch bridges, which are part of a former network of roads, designed to accommodate chariots, between Tiryns ...
[PDF] The True and the Corbel Arch in Mainland Southeast Asian ...resolve.cambridge.org
Furthermore, laterite is such a hard material that it cannot be hewn into other than very rough blocks, which ipso facto prohibits its use in the construction ...
Corbel arch Facts for Kidskids.kiddle.co
A corbel arch is a special way to build an arch shape without using a "true" arch. Imagine stacking stones or bricks, each one sticking out a little further.
Corbel arch bridges from around the world - Structuraestructurae.net
Corbel arch bridges are actually not true arch bridges as they are formed by incrementally cantilevering blocks of stone to span a small distance.
Ancient bridges in China, Cambodia showcase contrasting ...asianews.network
Unlike Anping's long granite beams resting on hundreds of piers, Kampong Kdei was built from laterite blocks with more than 20 corbelled arches.
Spean Praptos Facts for Kidskids.kiddle.co
Spean Praptos was known as the longest stone-arch bridge in the world. It has more than 20 arches and stretches about 87 meters (285 feet) long.
Kampong Kdei Bridge Used Be Longest Stock Photo ...shutterstock.com
Spean Praptos or Kampong Kdei Bridge in Cambodia used to be the longest corbeled stone-arch bridge in the world · Siem Reap, Cambodia - December 27th, 2018: An ...
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